lesson 21 grammar

docs/howtostudykorean/unit-1/01-sentences.md

@@ -1399,7 +1399,7 @@ Examples
 
 <Details>
 
-*This is the first time you are being introduced to a word that must be conjugated in order to be used. Visit [Lesson 5](./05-tenses.md) for more information. Any word that ends in “*다*” must be conjugated to be used. The conjugation of* 이다 _is different than other words. I introduce all of these conjugations in [Lesson 9](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/unit-1-lesson-9/)._
+*This is the first time you are being introduced to a word that must be conjugated in order to be used. Visit [Lesson 5](./05-tenses.md) for more information. Any word that ends in “*다*” must be conjugated to be used. The conjugation of* 이다 _is different than other words. I introduce all of these conjugations in [Lesson 9](./09-conjugate-이다.md)._
 
 Common usages
 
@@ -1713,7 +1713,7 @@ The focus of this lesson (and [Lessons 2](./02-particles.md), [3](./03-verbs.md)
 
 The conjugation of sentences is very important, but so is the structure of sentences. When creating these lessons, I went back in forth many times thinking about which one I should present first. You can’t conjugate sentences if you don’t have a logical sentence to conjugate; and you can’t create a logical sentence if you don’t know how to conjugate it. In the end, I figured it would make more sense to present the information this way – where learners are introduced to sentence structure and then learn how to conjugate the words within the sentence.
 
-Throughout all of my lessons, I use example sentences to show how grammar can be used. The example sentences in Lessons 1 – 4 are not conjugated. However, directly beneath each non-conjugated sentence is a conjugated version of the same sentence in parenthesis (one formal and one informal conjugation). You might want to glimpse at how the words are conjugated, but remember that this will be taught in [Lessons 5](./05-tenses.md) and [6](./06-honorifics.md) (for verbs and adjectives) and [Lesson 9](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/unit-1-lesson-9/) (for 이다).
+Throughout all of my lessons, I use example sentences to show how grammar can be used. The example sentences in Lessons 1 – 4 are not conjugated. However, directly beneath each non-conjugated sentence is a conjugated version of the same sentence in parenthesis (one formal and one informal conjugation). You might want to glimpse at how the words are conjugated, but remember that this will be taught in [Lessons 5](./05-tenses.md) and [6](./06-honorifics.md) (for verbs and adjectives) and [Lesson 9](./09-conjugate-이다.md) (for 이다).
 
 ---
 

docs/howtostudykorean/unit-1/02-particles.md

@@ -616,7 +616,7 @@ Notes:
 
 The word “개” is usually used for dogs that are not pets.
 
-The counter for animals is “<TTS>마리</TTS>.” See [Lesson 10](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/unit-1-lesson-10/) for more information.
+The counter for animals is “<TTS>마리</TTS>.” See [Lesson 10](./10-numbers.md) for more information.
 
 The sound a dog makes in Korean is “<TTS>멍멍</TTS>.” This is like saying “woof woof” in English.
 
@@ -1095,7 +1095,7 @@ You might also want to try listening to all of the words on loop with this [Voca
 
 ## Introduction
 
-In [Lesson 1](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-1/) you learned about simple Korean particles. To review, you learned that:
+In [Lesson 1](./01-sentences.md) you learned about simple Korean particles. To review, you learned that:
 
 - ~는 or ~은 are used to indicate <span class="md spoiler">the subject (or main person/thing)</span> in a sentence.
 - ~를 or ~을 are used to indicate <span class="md spoiler">the object</span> in a sentence.
@@ -1127,7 +1127,7 @@ Let’s talk about the first usage, “to have.” In English, “to have” is
 
 This usage of 있다 in Korean is an _adjective._ This is hard for a learner to wrap their head around. At this point, this is important to you for one reason.
 
-You learned in [Lesson 1](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-1/) that sentences with adjectives cannot act on an object. Thus, you cannot have a word with the particle ~을/를 attached to it if the predicating word in a sentence is an adjective (because ~을/를 indicates an object in a sentence).
+You learned in [Lesson 1](./01-sentences.md) that sentences with adjectives cannot act on an object. Thus, you cannot have a word with the particle ~을/를 attached to it if the predicating word in a sentence is an adjective (because ~을/를 indicates an object in a sentence).
 
 If this _weren’t_ the case, we could do the following:
 
@@ -1153,7 +1153,7 @@ Remember that the example sentences provided in Lessons 1, 2, 3 and 4 are _not_
 
 ## Indicating a Place or Time: ~에
 
-In the [previous lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-1/), you learned how to use the particles ~은/는 and ~을/를 to denote the purpose of certain words in a Korean sentence. The particle ~에 is also used to denote certain words in a sentence. Specifically, ~에 denotes a place or time. When used to identify a place, it is similar to the underlined words in the English sentences below:
+In the [previous lesson](./01-sentences.md), you learned how to use the particles ~은/는 and ~을/를 to denote the purpose of certain words in a Korean sentence. The particle ~에 is also used to denote certain words in a sentence. Specifically, ~에 denotes a place or time. When used to identify a place, it is similar to the underlined words in the English sentences below:
 
 - I am at school
 - I went to the park
@@ -1248,7 +1248,7 @@ One of the most difficult things for a new learner of Korean to understand is th
 
 In addition to this, there are more functions of ~이/가 that you should know about.
 
-In [Lesson 1](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-1/), you learned that you should add ~는/은 to the subject of the sentence. To use an example using the grammar taught earlier in this Lesson, you could say:
+In [Lesson 1](./01-sentences.md), you learned that you should add ~는/은 to the subject of the sentence. To use an example using the grammar taught earlier in this Lesson, you could say:
 
 - 고양이**는** 집 뒤에 있다 = <span class="md spoiler">The cat is behind the house</span>
   - (고양이**는** 집 뒤에 있어 / 고양이**는** 집 뒤에 있어요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2014/10/Lesson2new11.mp3" />)
@@ -1309,15 +1309,15 @@ In addition to the distinction discussed in this lesson, there are other situati
 
 At this point, I would like you to continue to [Lesson 3](./03-verbs.md) to continue learning other grammatical principles you need to deepen your understanding of Korean in general.
 
-In [Lessons 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/) and [22](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-22/), we will come back to this problem and dive into more ways we can distinguish the functions of ~이/가 and ~는/은. I want to stress that I do not want you to read these now, but you should know that there is more to distinguishing ~는/은 and ~이/가 than is described here.
+In [Lessons 17](./17-connecting-want.md) and [22](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-22/), we will come back to this problem and dive into more ways we can distinguish the functions of ~이/가 and ~는/은. I want to stress that I do not want you to read these now, but you should know that there is more to distinguishing ~는/은 and ~이/가 than is described here.
 
-If you haven’t reached [Lesson 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/) (and especially if you haven’t even moved on to [Lesson 3](./03-verbs.md)) you won’t understand what is being described in that lesson. Being able to fully understand the difference between ~이/가 and ~는/은 is important, but not as important (at the moment) as understanding other aspects of Korean grammar. I can’t stress this enough – your understanding of the difference between the two will progress with your Korean development in general.
+If you haven’t reached [Lesson 17](./17-connecting-want.md) (and especially if you haven’t even moved on to [Lesson 3](./03-verbs.md)) you won’t understand what is being described in that lesson. Being able to fully understand the difference between ~이/가 and ~는/은 is important, but not as important (at the moment) as understanding other aspects of Korean grammar. I can’t stress this enough – your understanding of the difference between the two will progress with your Korean development in general.
 
 The good thing is, even if you make a mistake with the usages of ~이/가 and ~는/은 (either because you are confused or because you haven’t reached the later lessons yet), 99.9% of the time, the listener will be able to understand exactly what you are trying to express. Likewise, if you listen to somebody speaking, you will be able to understand what they are trying to say regardless of if you have learned the more complex usages of ~이/가 and ~는/은. The difference between these two particles is about nuance and does not dramatically change the meaning of the sentence.
 
 Making a mistake between other particles, however, _would_ cause other people to misunderstand you. For example, using ~를/을 instead of ~는/은 would (most likely) make your sentence incomprehensible.
 
-That’s it for this lesson. Please keep all of this information in your mind for future lessons. We will continue this discussion in [Lesson 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/).
+That’s it for this lesson. Please keep all of this information in your mind for future lessons. We will continue this discussion in [Lesson 17](./17-connecting-want.md).
 
 For now, please continue to [Lesson 3](./03-verbs.md).
 

docs/howtostudykorean/unit-1/03-verbs.md

@@ -1229,7 +1229,7 @@ It is also commonly used to indicate that one “holds” an event where many pe
 
 Notes:
 
-This word can only be used to say that you want a noun. You cannot say that you want to do a verb using 원하다. In order to say “I want to do…” see [Lesson 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/).
+This word can only be used to say that you want a noun. You cannot say that you want to do a verb using 원하다. In order to say “I want to do…” see [Lesson 17](./17-connecting-want.md).
 
 Examples:
 
@@ -1330,7 +1330,7 @@ Example:
 
 Notes:
 
-좋다 is an adjective that means “good.” 좋아하다 is a verb that means “like.” For more information, see [Lesson 15](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-15/).
+좋다 is an adjective that means “good.” 좋아하다 is a verb that means “like.” For more information, see [Lesson 15](./15-good-carry-similar.md).
 
 Examples:
 
@@ -1500,7 +1500,7 @@ Example:
 
 The pronunciation of this word is closer to “조타”
 
-Notes: Although this translates to “good,” it is often used to say that one “likes” something. The grammar for this is taught in [Lesson 15](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-15/).
+Notes: Although this translates to “good,” it is often used to say that one “likes” something. The grammar for this is taught in [Lesson 15](./15-good-carry-similar.md).
 
 Examples:
 
@@ -1656,7 +1656,7 @@ We will get into more complicated particles in later lessons, but here I want to
 Korean adjectives, just like Korean verbs are placed at the end of a sentence. The main difference between verbs and adjectives is that an adjective can never act on an object. Notice, in the sentences below that there is no object being acted on.
 Adjectives are very easy to use. Just put them into the sentence with your subject. (Remember that the examples in parentheses show sentences that have been conjugated which you have not learned yet.)
 
-_Note that due to weird Korean grammatical rules regarding adjectives, the un-conjugated sentences below are actually grammatically correct as they are. Therefore, we provided audio examples for the un-conjugated sentences and not the conjugated sentences (although all are correct). You will learn about this weird rule and how to conjugate adjectives in [Lesson 5](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-5/)._
+_Note that due to weird Korean grammatical rules regarding adjectives, the un-conjugated sentences below are actually grammatically correct as they are. Therefore, we provided audio examples for the un-conjugated sentences and not the conjugated sentences (although all are correct). You will learn about this weird rule and how to conjugate adjectives in [Lesson 5](./05-tenses.md)._
 
 - 나는 아름답다 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2014/01/Lesson-3-8.mp3" /> = <span class="md spoiler">I am beautiful</span>
   - (나는 아름다워 / 저는 아름다워요)

docs/howtostudykorean/unit-1/04-adjectives.md

@@ -1509,7 +1509,7 @@ Notes:
 
 In order to say that you live in a place, it is acceptable to use “<span class="md spoiler">살고 있다</span>.”
 
-For example: 저는 한국에서 살고 있어요. Note that this directly translates to “<span class="md spoiler">I am living in Korea</span>”, whereas is English we would most likely say “<span class="md spoiler">I live in Korea</span>.” See [Lesson 18](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-18/).
+For example: 저는 한국에서 살고 있어요. Note that this directly translates to “<span class="md spoiler">I am living in Korea</span>”, whereas is English we would most likely say “<span class="md spoiler">I live in Korea</span>.” See [Lesson 18](./18-present-progressive.md).
 
 Example:
 
@@ -1628,7 +1628,7 @@ Common Usages:
 
 Notes:
 
-When saying something is different “from” something, 와/과/랑/이랑 must be attached to the noun that is being compared. See [Lesson 15](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-15/) for more information.
+When saying something is different “from” something, 와/과/랑/이랑 must be attached to the noun that is being compared. See [Lesson 15](./15-good-carry-similar.md) for more information.
 
 Examples:
 

docs/howtostudykorean/unit-1/05-tenses.md

@@ -1305,7 +1305,7 @@ Common Usages:
 
 Notes:
 
-싫다 can be used to say “<span class="md spoiler">one does not like</span>” by attaching ~이/가 to an object. For more information, see [Lesson 15](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-15/).
+싫다 can be used to say “<span class="md spoiler">one does not like</span>” by attaching ~이/가 to an object. For more information, see [Lesson 15](./15-good-carry-similar.md).
 
 Example:
 
@@ -1491,7 +1491,7 @@ Common Usages:
 
 Notes:
 
-When talking about a day, “<TTS>날</TTS>” should be used. For more information, see [Lesson 11](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-11/).
+When talking about a day, “<TTS>날</TTS>” should be used. For more information, see [Lesson 11](./11-time.md).
 
 Examples:
 
@@ -1514,7 +1514,7 @@ Common Usages:
 
 Notes:
 
-You can use this word to indicate that something was done for a certain amount of hours. In addition, it can mean “time” as in “last time” or “this time.” For more information, visit [Lesson 11](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-11/).
+You can use this word to indicate that something was done for a certain amount of hours. In addition, it can mean “time” as in “last time” or “this time.” For more information, visit [Lesson 11](./11-time.md).
 
 Examples:
 
@@ -1576,12 +1576,12 @@ Although the word in Korean for “I/me” doesn’t change based on its usage i
 - 저를
 - 나를
 
-~가 can be attached to 저 and 나 to indicate “I” is the subject of a sentence or clause. I have already briefly distinguished the difference between ~이/가 and ~은/는 in [Lesson 2](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-2/). The difference between these particles is very subtle and takes years to fully grasp. I discuss these differences more deeply in [Lesson 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/) and [Lesson 22](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-22/) but this isn’t immediately important to you right now. What is immediately important to you is that you remember that when ~가 is attached 나 changes to 내, and 저 changes to 제. For example:
+~가 can be attached to 저 and 나 to indicate “I” is the subject of a sentence or clause. I have already briefly distinguished the difference between ~이/가 and ~은/는 in [Lesson 2](./02-particles.md). The difference between these particles is very subtle and takes years to fully grasp. I discuss these differences more deeply in [Lesson 17](./17-connecting-want.md) and [Lesson 22](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-22/) but this isn’t immediately important to you right now. What is immediately important to you is that you remember that when ~가 is attached 나 changes to 내, and 저 changes to 제. For example:
 
 - 내가
 - 제가
 
-In the lesson below, all of the sentences are conjugated in an informal style. Therefore, all of the example sentences below use the informal “나” or “내.” In this lesson, don’t worry about formality and just focus on the information that I present. In the [next lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-6/), you will learn more about formal and informal speech, and you will see “저” and “제” being used.
+In the lesson below, all of the sentences are conjugated in an informal style. Therefore, all of the example sentences below use the informal “나” or “내.” In this lesson, don’t worry about formality and just focus on the information that I present. In the [next lesson](./06-honorifics.md), you will learn more about formal and informal speech, and you will see “저” and “제” being used.
 
 ## How to say “you”
 
@@ -1829,7 +1829,7 @@ You must add 았다 or 었다 to the stem of a word. 았다 is added to words wi
 
 The meaning of “_오래되다_” is not “old” in a bad, negative sense. Rather, it is indicating that something has existed for a long time, and now it is “old.” A more appropriate way to indicate that something is “old and decrepit” is to use the word “_낡다_”… not to be confused with the word “_늙다_”, which refers to an “old” person.
 
-This is a little bit complicated for you now, but although ~_었다_ is attached to _되_ to make “_되었다_”, this can be contracted. Teaching this is not the focus of this lesson, so don’t worry about this for now. You will learn more about _되다_ in future lessons. See [Lesson 9](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/unit-1-lesson-9/) or [Lesson 14](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-14-korean-passive-verbs/) for lessons nearby that discuss ‘_되다_.’
+This is a little bit complicated for you now, but although ~_었다_ is attached to _되_ to make “_되었다_”, this can be contracted. Teaching this is not the focus of this lesson, so don’t worry about this for now. You will learn more about _되다_ in future lessons. See [Lesson 9](./09-conjugate-이다.md) or [Lesson 14](./14-passive.md) for lessons nearby that discuss ‘_되다_.’
 
 Also, while _되다_ is commonly used and conjugated as a verb, in this case, _오래되다_ is an adjective. Which means that [in addition to other ways it will change when used with other grammatical principles], ~_ㄴ_ can be added to it to describe an upcoming noun.
 
@@ -1871,7 +1871,7 @@ Check out the table giving a breakdown of adjectives in the past, present and fu
 
 있다 can be an adjective, or it can be a verb. Whether it is an adjective or a verb depends on its usage.
 
-있다 is an adjective when it is used to indicate that one “has” something. You learned these sentences in [Lesson 2](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-2/):
+있다 is an adjective when it is used to indicate that one “has” something. You learned these sentences in [Lesson 2](./02-particles.md):
 
 - 나는 펜이 있다 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/11/Lesson-5-s11.mp3" /> = <span class="md spoiler">I have a pen</span>
 - 나는 차가 있다 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/11/Lesson-5-s12.mp3" /> = <span class="md spoiler">I have a car</span>
@@ -1879,7 +1879,7 @@ Check out the table giving a breakdown of adjectives in the past, present and fu
 
 Because this 있다 is considered an adjective, we follow the rule for conjugating an adjective to the present tense – which is do nothing and leave the adjective the way it is. So, those three sentences above are perfectly conjugated and grammatically correct.
 
-When 있다 is used to indicate that something/someone is “at/in” a location, it is also an adjective. This is also very difficult for an English speaker to wrap their head around. You learned these sentences in [Lesson 2](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-2/):
+When 있다 is used to indicate that something/someone is “at/in” a location, it is also an adjective. This is also very difficult for an English speaker to wrap their head around. You learned these sentences in [Lesson 2](./02-particles.md):
 
 - 나는 은행 안에 있다 = <span class="md spoiler">I am inside the bank</span>
 - 개는 집 안에 있다 = <span class="md spoiler">The dog is in the house</span>
@@ -1893,8 +1893,8 @@ However, the usage of 있다 is much more complex than just these two meanings.
 
 Below are some complicated ways that 있다 can be seen as a verb. You absolutely do not need to understand these now. I suggest that you worry about them when you reach that particular lesson in your studies:
 
-- In [Lesson 14](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-14-korean-passive-verbs/) when ~아/어 있다 is used to indicate the passive state of a verb
+- In [Lesson 14](./14-passive.md) when ~아/어 있다 is used to indicate the passive state of a verb
-- In [Lesson 18](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-18/) when ~고 있다 is used to indicate one continues doing something
+- In [Lesson 18](./18-present-progressive.md) when ~고 있다 is used to indicate one continues doing something
 - In [Lesson 40](https://www.howtostudykorean.com/unit-2-lower-intermediate-korean-grammar/unit-2-lessons-34-41/lesson-40/) when telling somebody to stay in a location or in a state
 - In [Lesson 44](https://www.howtostudykorean.com/unit-2-lower-intermediate-korean-grammar/unit-2-lessons-42-50/lesson-44/) when ~자 is used to make a suggestion to stay in a place
 

docs/howtostudykorean/unit-1/06-honorifics.md

@@ -1310,7 +1310,7 @@ Notes:
 
 To say that one was sitting while doing something, you should attach “~아/어서” to 앉다. For example:
 
-- <TTS>저는 앉아서 먹었어요</TTS> = <span class="md spoiler">I sat down and ate.</span> The grammar for this is introduced in [Lesson 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/).
+- <TTS>저는 앉아서 먹었어요</TTS> = <span class="md spoiler">I sat down and ate.</span> The grammar for this is introduced in [Lesson 17](./17-connecting-want.md).
 
 Example:
 
@@ -1449,7 +1449,7 @@ Example:
 
 <Details>
 
-- 듣다 follows the ㄷ irregular. See [Lesson 7](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-7/) for more information.
+- 듣다 follows the ㄷ irregular. See [Lesson 7](./07-irregulars.md) for more information.
 
 Common Usages:
 
@@ -1531,7 +1531,7 @@ Example:
 
 <Details>
 
-빠르다 follows the 르 irregular. See [Lesson 7](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-7/) for more information.
+빠르다 follows the 르 irregular. See [Lesson 7](./07-irregulars.md) for more information.
 
 Notes:
 

docs/howtostudykorean/unit-1/07-irregulars.md

@@ -1715,7 +1715,7 @@ Common Usages:
 
 Notes:
 
-See [Lesson 15](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-15/ "Lesson 15: Miscellaneous Words and Grammar: 들다, Korean Homonyms, Being Sick, Different/Similar/Same") for more information
+See [Lesson 15](./15-good-carry-similar.md) for more information
 
 Example:
 
@@ -1875,7 +1875,7 @@ You might also want to try listening to all of the words on loop with this [Voca
 
 <VocabQuiz fm-key="sentence" />
 
-As with all languages, there are some irregular conjugations that you need to know. Irregulars are applied to certain verbs or adjectives when adding something to the stem of the word. Korean grammar is based on these “additions” that are added to stems. I mentioned this in [Lesson 5](https://www.howtostudykorean.com/unit1/unit-1-lessons-1-8/unit-1-lesson-5/), but I want to reiterate it here.
+As with all languages, there are some irregular conjugations that you need to know. Irregulars are applied to certain verbs or adjectives when adding something to the stem of the word. Korean grammar is based on these “additions” that are added to stems. I mentioned this in [Lesson 5](./05-tenses.md), but I want to reiterate it here.
 
 There are hundreds of additions that you can add to the stem of a verb or adjective. Some of these additions are conjugations and some of them are grammatical principles that have meaning in a sentence.
 
@@ -1946,7 +1946,7 @@ The third one (which is incorrect) completely changes the sound of the word stem
 
 Some other examples of words that follow this irregular are (these words are too difficult for you right now, but I’m just showing you):
 
-- <TTS>낫다</TTS> = <span class="md spoiler">better (adjective)</span> – You will learn more about this word in [Lesson 19](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-19/#comp31)
+- <TTS>낫다</TTS> = <span class="md spoiler">better (adjective)</span> – You will learn more about this word in [Lesson 19](./19-comparatives.md#comp31)
 - <TTS>잇다</TTS> = <span class="md spoiler">to continue (verb)</span>
 
 Common words that this does not apply to are:

docs/howtostudykorean/unit-1/09-conjugate-이다.md

@@ -1939,7 +1939,7 @@ As you build vocabulary, you will be able to apply this same format of sentences
 - This place will become a park next year
 - I will become a doctor in a few months
 
-_In [Lesson 11](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-11/), you will learn the vocabulary necessary to create those types of sentences._
+_In [Lesson 11](./11-time.md), you will learn the vocabulary necessary to create those types of sentences._
 
 The sentences above using 이다 and 되다 in the future tense can be used to make negative sentences as well. When making the negative form of a 되다 sentence, you can just add 안 or ~지 않다 just like with any other verb or adjective. When making the negative form of an 이다 sentence, you should use 아니다. You can change each pair of sentences above to a negative sentence. For example:
 

docs/howtostudykorean/unit-1/10-numbers.md

@@ -843,7 +843,7 @@ Example:
 Notes:
 
 - When <span class="md spoiler">telling time,</span> “시” is put after the hour. For example: 5시 = 5:00
-- When <span class="md spoiler">talking about “hours,”</span> the word “시간” is used. See [Lesson 11](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-11/) for more information.
+- When <span class="md spoiler">talking about “hours,”</span> the word “시간” is used. See [Lesson 11](./11-time.md) for more information.
 
 Example:
 
@@ -859,7 +859,7 @@ Example:
 
 Notes:
 
-When telling time, “분” is put after the minute. It also means “minute” in regular situations. See [Lesson 11](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-11/) for more information.
+When telling time, “분” is put after the minute. It also means “minute” in regular situations. See [Lesson 11](./11-time.md) for more information.
 
 Example:
 
@@ -1063,7 +1063,7 @@ When writing out the word instead of using the numeral (for example, writing “
 
 When the Korean numbers are used (i.e. when counting things or actions), the word is more typically used than the numeral. In our lessons, you will usually see the Korean word written out when a counter is used.
 
-In other situations where Sino-Korean numbers are used, there is no difference if you use the Sino-Korean numeral or the word. I will come back to this in the [next lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-11/) when you learn applications for Sino-Korean numbers.
+In other situations where Sino-Korean numbers are used, there is no difference if you use the Sino-Korean numeral or the word. I will come back to this in the [next lesson](./11-time.md) when you learn applications for Sino-Korean numbers.
 
 These nouns that we have counted can now become the object of a sentence:
 
@@ -1140,7 +1140,7 @@ This is fairly simple to use, but you will continue to learn about this word in
 
 <VocabQuiz fm-key="sentence" category="time" />
 
-There are so many different ways to talk about time (seconds, minutes, hours, days, weeks, months, years, etc…). You will learn more about how to indicate when you did/do/will do something using these ‘time’ words in the [next lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-11/). In this lesson, however, you will learn about telling time, as in the time on a clock.
+There are so many different ways to talk about time (seconds, minutes, hours, days, weeks, months, years, etc…). You will learn more about how to indicate when you did/do/will do something using these ‘time’ words in the [next lesson](./11-time.md). In this lesson, however, you will learn about telling time, as in the time on a clock.
 
 When talking about the hour, as in ‘2 o’clock’ all you need to do is put <TTS>시</TTS> after a number:
 

docs/howtostudykorean/unit-1/14-passive.md

@@ -1676,7 +1676,7 @@ _As you know,_ 있다 _has many usages and meanings in Korean. Sometimes_ 있다
 - 저는 문을 잠갔어요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/28.mp3" /> = <span class="md spoiler">I locked the door</span>
 - 문이 잠겨 있어요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/29-1.mp3" /> = <span class="md spoiler">The door is (in the state of) locked</span>
 
-Notice that ~이/가 is used in the passive sentences above. In most cases, this is usually more natural with these types of sentences. Don’t worry about that for now (I’ll discuss it in [Lesson 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/)), and focus more on how the verbs (both active and passive) are being used.
+Notice that ~이/가 is used in the passive sentences above. In most cases, this is usually more natural with these types of sentences. Don’t worry about that for now (I’ll discuss it in [Lesson 17](./17-connecting-want.md)), and focus more on how the verbs (both active and passive) are being used.
 
 ---
 
@@ -1788,7 +1788,7 @@ As I said before, 나다 itself means “<span class="md spoiler">for something
 - 그 가방에서 냄새가 났어요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-14-18.mp3" /> = <span class="md spoiler">That bag is smelly</span> (<span class="md spoiler">A smell is coming out of that bag</span>)
 - 그 방에서 냄새가 났어요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-14-19.mp3" /> = <span class="md spoiler">That room is smelly</span> (<span class="md spoiler">A smell is coming out of that room</span>)
 
-_Remember that_ 나다 *is a passive verb and cannot act on an object. Therefore, the particle ~*이/가 *must be used on “*것*.” You will learn more about this sentence structure in the [next lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-15/#m3).*
+_Remember that_ 나다 *is a passive verb and cannot act on an object. Therefore, the particle ~*이/가 *must be used on “*것*.” You will learn more about this sentence structure in the [next lesson](./15-good-carry-similar.md#m3).*
 
 Another common example of “나다” in use is in the following phrase:
 

docs/howtostudykorean/unit-1/15-good-carry-similar.md

@@ -2155,7 +2155,7 @@ What I am trying to get at here – is that often times in Korean there is an ad
 
 Adjectives and passive verbs can never act on objects, so instead of using ~를/을 in these situations, you have to use ~이/가. Another example where this is commonly done is with <TTS>그립다</TTS>:
 
-그립다 = this word is translated as “<span class="md spoiler">to miss</span>,” but is usually used when <span class="md spoiler">talking about missing a non-person</span> (it is sometimes used to say that you miss a person, but we will talk about how to say you miss a person in [Lesson 17](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/)).
+그립다 = this word is translated as “<span class="md spoiler">to miss</span>,” but is usually used when <span class="md spoiler">talking about missing a non-person</span> (it is sometimes used to say that you miss a person, but we will talk about how to say you miss a person in [Lesson 17](./17-connecting-want.md)).
 
 그립다 is an _adjective_ in Korean (because it actually describes <span class="md spoiler">the feeling rather than an action verb</span>). This means that if you want to say “I miss Korean food” you cannot say:
 
@@ -2500,7 +2500,7 @@ Also note that even though you have a cold in the present tense, Korean people u
 
 - 저의 아들은 시끄럽게 기침했어요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/63.mp3" /> = <span class="md spoiler">My son coughed loudly</span>
 
-_(Probably more naturally translated to “My son was coughing loudly.” Korean people don’t really distinguish between simple and progressive past tenses as much as we do in English. You will learn about the progressive tense in [Lesson 18](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-18/).)_
+_(Probably more naturally translated to “My son was coughing loudly.” Korean people don’t really distinguish between simple and progressive past tenses as much as we do in English. You will learn about the progressive tense in [Lesson 18](./18-present-progressive.md).)_
 
 Wow that’s a long lesson. I have to apologize for writing these lessons so long. This lesson could have easily been broken into 2, 3 or even 4 separate lessons, but I chose against doing it that way. When I was first learning Korean, I wanted to plow through material as fast as I possibly could – and I guess that is coming out as I am writing these lessons as well.
 

docs/howtostudykorean/unit-1/17-connecting-want.md

@@ -1576,7 +1576,7 @@ In these situations, it is common to use \~고 to connect the two sentences as t
 - 이 사람은 부자이고 저 사람은 가난해요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-17-17.mp3" /> = <span class="md spoiler">That person is rich, but that person is poor</span>
 - 이분은 저의 아버지이고 이분은 저의 어머니입니다 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson17-21.mp3" /> = <span class="md spoiler">This person is my father, and this person is my mother</span>
 
-I continue to talk about the use of \~는/은 and \~이/가 later in the [lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-17/#visit).
+I continue to talk about the use of \~는/은 and \~이/가 later in the [lesson](#visit).
 
 For now, let’s move on to applying this meaning to other verbs.
 
@@ -1695,7 +1695,7 @@ Actually, you _have_ come across this \~고 싶다 grammar concept before, but y
 
 - 저는 친구를 보고 싶어요 <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson17-41.mp3" /> = <span class="md spoiler">I miss my friend/I want to see my friend</span>
 
-\~고 싶다 is not used with adjectives. In English, it is acceptable to say something like “I want to be happy.” If you want to say something like this in Korean, you need to add an additional grammatical principle that changes the meaning to “I want to _become_ happy.” You will learn how to create this meaning with \~아/어지다 in the [next lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-18/ "Lesson 18: Present Progressive ~고 있다 (I am ___ing), Adjective + 아/어지다 (Getting ___)").
+\~고 싶다 is not used with adjectives. In English, it is acceptable to say something like “I want to be happy.” If you want to say something like this in Korean, you need to add an additional grammatical principle that changes the meaning to “I want to _become_ happy.” You will learn how to create this meaning with \~아/어지다 in the [next lesson](./18-present-progressive.md).
 
 One thing to note is that 싶다 actually acts as an adjective, and must be conjugated as one. This means that:
 

docs/howtostudykorean/unit-1/21-why-when-where-who.md

@@ -1136,17 +1136,17 @@ Asking questions in Korean, at first glance, is very easy. For the most part, as
 
 Asking questions in English is unnecessarily complicated. If I asked you the question “Do you like sports?” In English, what is the meaning of the word “do” in that sentence? In English, whenever we ask a question (without a question word), we need to include the words did/do/will to make the listener know that we are asking a question.
 
-Did you go to the park?
+- Did you go to the park?
-Do you like sports?
+- Do you like sports?
-Will you eat with us?
+- Will you eat with us?
 
 It is so confusing in English, and my two sentence explanation doesn’t really explain it very well. Luckily, this is not an English learning website! You are here to learn how to ask questions in Korean. Enough of this English nonsense.
 
 In Korean, if you are asking a question that does not require the use of a question word (one more time: who/what/when/where/why/how/how much/how many) you don’t need to do anything structurally to make that sentence a question. All you need to do is raise the intonation of the end of the sentence to make it sound like a question. For example, if you want to say “My mother ate” you already know that you can say:
 
-엄마는 먹었어요 = My mom ate
+- 엄마는 먹었어요 = <span class="md spoiler">My mom ate</span>
 
-But if you want to ask somebody “did you eat?” You just raise the intonation of the end of the sentence to make it sound like a question:
+But if you want to ask somebody “did you eat?” You just <span class="md spoiler">raise the intonation of the end of the sentence</span> to make it sound like a question:
 
 - 엄마는 먹었어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-1.mp3" /> = <span class="md spoiler">(literally means “did mom eat?”)</span>
 
@@ -1175,35 +1175,35 @@ The formal high respect \~습니다 is never used as a question. When asking a q
 
 I work at a school in Seoul. In the bathrooms, there are charts on the walls that the cleaning staff is supposed to check once per day. Written on these charts is a list of questions about the state of the bathroom.
 
-While you will not understand most of the words on this list, notice that all of the sentences (except for the last one) has the ending \~ㅂ/습니까?
+While you will not understand most of the words on this list, _notice that all of the sentences (except for the last one) has the ending \~ㅂ/습니까?_
 
-[![Bathroomchart - Copy|282x349](https://www.howtostudykorean.com/wp-content/uploads/2012/07/Bathroomchart-Copy.jpeg)](https://www.howtostudykorean.com/wp-content/uploads/2012/07/Bathroomchart-Copy.jpeg)
+[![Bathroomchart|282x349](https://www.howtostudykorean.com/wp-content/uploads/2012/07/Bathroomchart-Copy.jpeg)](https://www.howtostudykorean.com/wp-content/uploads/2012/07/Bathroomchart-Copy.jpeg)
 
 Some of the words provided in the 10 sentences above are fairly difficult. However, I would like to translate it for you:
 
-1.  Is the bathroom floor clean?
+1.  <span class="md spoiler">Is the bathroom floor clean?</span>
-2.  Is the sink clean?
+2.  <span class="md spoiler">Is the sink clean?</span>
-3.  Has the mirror been wiped clean?
+3.  <span class="md spoiler">Has the mirror been wiped clean?</span>
-4.  Is there extra soap?
+4.  <span class="md spoiler">Is there extra soap?</span>
-5.  Is the toilet paper ready?
+5.  <span class="md spoiler">Is the toilet paper ready?</span>
-6.  Is the bathroom’s garbage can empty?
+6.  <span class="md spoiler">Is the bathroom’s garbage can empty?</span>
-7.  Are there no toilets that haven’t been flushed?
+7.  <span class="md spoiler">Are there no toilets that haven’t been flushed?</span>
-8.  Are any lights broken?
+8.  <span class="md spoiler">Are any lights broken?</span>
-9.  Is there any smell?
+9.  <span class="md spoiler">Is there any smell?</span>
-10. Are there any places, the doorknob, the faucet, etc that are broken?
+10. <span class="md spoiler">Are there any places, the doorknob, the faucet, etc that are broken?</span>
 
 There are other ways you can change a sentence to make it a question. \~ㅂ/습니까 is typically the most formal. We will talk about the others in the upcoming sections.
 
 ### \~니
 
-When asking a question, instead of ending your sentences with \~아/어, you can end them with \~니. This is an informal way to ask a question, and you can do this in all tenses. For example:
+When asking a question, instead of ending your sentences with \~아/어, _you can end them with \~니_. This is an informal way to ask a question, and you can do this in all tenses. For example:
 
 - Past tense: 했니, 먹었니, 갔니, 이었니
 - Present tense: 하니, 먹니, 가니, 이니
 - Future tense (\~겠): 하겠니, 먹겠니, 가겠니
 - Future tense (\~ㄹ 것이다): 할 거니, 할 것이니, 먹을 거니, 먹을 것이니
 
-However, note that using this form gives the sentence a slightly feminine feel to it (I’ve never once used \~니). However, I work at a Korean high school, and I hear female Korean teachers use this form all the time when asking questions to a student.
+However, note that using this form gives the sentence a slightly <span class="md spoiler">feminine</span> feel to it (I’ve never once used \~니). However, I work at a Korean high school, and I hear female Korean teachers use this form all the time when asking questions to a student.
 
 - 시험을 잘 봤니? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-12.mp3" /> = <span class="md spoiler">Did you write the exam well (did you do well on the exam)?</span>
 - 서울에 가겠니? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-13.mp3" /> = <span class="md spoiler">Are you going to go to Seoul?</span>
@@ -1214,19 +1214,19 @@ However, note that using this form gives the sentence a slightly feminine feel t
 
 In [Lesson 7](./07-irregulars.md), you learned how irregular words change as a result of adding different additions. This is the first time you have been introduced to adding \~니.
 
-The ㄹ irregular applies when adding \~니. When you add \~니 to a stem of a word that ends in ㄹ, you must drop the ㄹ from the stem, and attach the grammatical principle to the remainder of the word. For example:
+_The ㄹ irregular applies when adding \~니. When you add \~니 to a stem of a word that ends in ㄹ, you must drop the ㄹ from the stem_, and attach the grammatical principle to the remainder of the word. For example:
 
-열다 + \~니 = 여니
+- 열다 + \~니 = 여니
 
 As you know, some additions require the speaker to choose between two possible options – for example, choosing between \~아 and \~어 when adding \~아/어. Notice that when adding \~니 there is no choice. I call this a “solid ㄴ.” That is, there is only one choice, and it starts with ㄴ.
 
 In later lessons, you will learn other grammatical additions that have a solid ㄴ. For example:
 
-\~나 ([later in this lesson](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-21-asking-questions-in-korean-why-when-where-and-who/#21new))
+- \~나 ([later in this lesson](#%E1%84%82%E1%85%A1-%E1%84%8B%E1%85%AD))
-\~는 ([Lesson 26](https://www.howtostudykorean.com/unit-2-lower-intermediate-korean-grammar/unit-2-lessons-26-33/lesson-26/))
+- \~는 ([Lesson 26](https://www.howtostudykorean.com/unit-2-lower-intermediate-korean-grammar/unit-2-lessons-26-33/lesson-26/))
-\~는데 ([Lesson 76](https://www.howtostudykorean.com/upper-intermediate-korean-grammar/unit-4-lessons-76-83/lesson-76/))
+- \~는데 ([Lesson 76](https://www.howtostudykorean.com/upper-intermediate-korean-grammar/unit-4-lessons-76-83/lesson-76/))
-\~네 ([Lesson 83](https://www.howtostudykorean.com/upper-intermediate-korean-grammar/unit-4-lessons-76-83/lesson-83/))
+- \~네 ([Lesson 83](https://www.howtostudykorean.com/upper-intermediate-korean-grammar/unit-4-lessons-76-83/lesson-83/))
-\~나 ([Lesson 109](https://www.howtostudykorean.com/unit-5/lessons-109-116/lesson-109/))
+- \~나 ([Lesson 109](https://www.howtostudykorean.com/unit-5/lessons-109-116/lesson-109/))
 
 All grammatical additions where a solid ㄴ is attached to a word follow the same rule as when \~니 is added. Below are some examples of \~니 in use with the ㄹ irregular:
 
@@ -1234,21 +1234,23 @@ All grammatical additions where a solid ㄴ is attached to a word follow the sam
 - 마음에 드니? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-7.mp3" /> = <span class="md spoiler">Do you like it?</span>
 - 어디 사니? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-8.mp3" /> = <span class="md spoiler">Where do you live?</span>
 
-\~니 also affects the ㅎ irregular, which is introduced in [Lesson 23](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-23/).
+_\~니 also affects the ㅎ irregular,_ which is introduced in [Lesson 23](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-23/).
 
 ### \~ㄴ/은가(요)
 
 Just like ‘\~니’ you can also end your questions with \~ㄴ/은가(요). Adding “요” to the end makes it more formal. This form is less formal than the high-respect \~ㅂ/습니까 form.
 
-\~ㄴ/은가(요) gets added to the stem of adjectives. Using this form makes a question a little bit softer than using the forms described previously. The exact difference cannot be translated perfectly, but sort of like how “would it be okay if I go into the park?” sounds slightly softer than “can I go into the park.”
+\~ㄴ/은가(요) gets added to the stem of adjectives. Using this form makes a question a little bit softer than using the forms described previously. The exact difference cannot be translated perfectly, but sort of like how “<span class="md spoiler">would it be okay if I go into the park?</span>” sounds slightly softer than “can I go into the park.”
 
 You add \~ㄴ/은 to adjective stems just like you would when conjugating it to describe a noun:
-예쁘다 + ㄴ/은 = 예쁜
+
-작다 + ㄴ/은 = 작은
+- 예쁘다 + ㄴ/은 = 예쁜
+- 작다 + ㄴ/은 = 작은
 
 And then attach “가(요)” after that construction:
-예쁜가(요)?
+
-작은가(요)?
+- 예쁜가(요)?
+- 작은가(요)?
 
 It is only conjugated into the present tense and therefore usually only used to ask about some sort of present situation. For example:
 
@@ -1287,8 +1289,8 @@ This form can be used in the past tense as well. For example:
 
 It is possible to use this in the future tense, but it only sounds natural when applying it to the \~겠다 future conjugation. Adding \~나(요) to 이다 is typically not done, and therefore adding it to words that are conjugating using \~ㄹ/을 것이다 is unnatural. For example:
 
-- 내일 퇴원할 거나요? – unnatural
+- ~~내일 퇴원할 거나요?~~ – unnatural
-- 내일 퇴원할 것이나요? – unnatural
+- ~~내일 퇴원할 것이나요?~~ – unnatural
 
 ## Using Question Words
 
@@ -1300,22 +1302,22 @@ Why (왜) is probably the easiest question word in Korean. ‘왜’ is an adver
 
 With these adverb-question words, you can typically just take a statement and change it into a question by inserting the word into the sentence. For example:
 
-- 만화책을 좋아합니까? = Do you like comic books?
+- 만화책을 좋아합니까? = <span class="md spoiler">Do you like comic books?</span>
 - 만화책을 왜 좋아합니까? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-35.mp3" /> = <span class="md spoiler">Why do you like comic books?</span>
 
 ---
 
-- (저는) 한국어를 공부하고 있어요 = I am studying Korean
+- (저는) 한국어를 공부하고 있어요 = <span class="md spoiler">I am studying Korean</span>
 - 한국어를 왜 공부하고 있어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-36.mp3" /> = <span class="md spoiler">Why are you studying Korean?</span>
 
 ---
 
-- (저는) 너무 빨리 먹었어요 = I ate really fast
+- (저는) 너무 빨리 먹었어요 = <span class="md spoiler">I ate really fast</span>
 - 왜 너무 빨리 먹었어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-37.mp3" /> = <span class="md spoiler">Why did you eat so fast?</span>
 
 ---
 
-- (저는) 어제 학교에 안 갔어요 = I didn’t go to school yesterday
+- (저는) 어제 학교에 안 갔어요 = <span class="md spoiler">I didn’t go to school yesterday</span>
 - 어제 학교에 왜 안 갔어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-22.mp3" /> = <span class="md spoiler">Why didn’t you go to school yesterday?</span>
 
 왜 is also used to respond when somebody calls your name (because they want you for some reason). In English, we would say “what,” but in Korean, they say “왜.” For example:
@@ -1329,52 +1331,52 @@ Notice that saying “why” in English is unnatural. This is how they say it in
 
 The usage of ‘when’ (언제) is very similar to the usage of ‘왜’ in Korean. As an adverb, it can be used to ask “when” something happens. For example:
 
-- 집에 갔어? = Did you go home?
+- 집에 갔어? = <span class="md spoiler">Did you go home?</span>
 - 집에 언제 갔어? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-40.mp3" /> = <span class="md spoiler">When did you go home?</span>
 
 ---
 
-- 집에 갈 거야? = Will you go home?
+- 집에 갈 거야? = <span class="md spoiler">Will you go home?</span>
 - 집에 언제 갈 거야? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-41.mp3" /> = <span class="md spoiler">When will you go home?</span>
 
 ---
 
-- 그 여자가 사라졌어요 = That girl disappeared
+- 그 여자가 사라졌어요 = <span class="md spoiler">That girl disappeared</span>
 - 그 여자가 언제 사라졌어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-24.mp3" /> = <span class="md spoiler">When did that girl disappear?</span>
 
 ---
 
-- 낮잠을 잤어요? = Did you take a nap?
+- 낮잠을 잤어요? = <span class="md spoiler">Did you take a nap?</span>
 - 낮잠을 언제 잤어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-25.mp3" /> = <span class="md spoiler">When did you take a nap?</span>
 
 ---
 
-- 아빠가 왔어요? = Did dad come?
+- 아빠가 왔어요? = <span class="md spoiler">Did dad come?</span>
 - 아빠가 언제 왔나요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-26.mp3" /> = <span class="md spoiler">When did dad come?</span>
 
-Particles like \~부터 and \~까지, which are often used to indicate from/until when something happens can be attached to 언제 to indicate that it is unknown “from/until when” something happens. For example:
+Particles like \~부터 and \~까지, which are often used to indicate from/until when something happens can be attached to 언제 to indicate that it is unknown “<span class="md spoiler">from/until when</span>” something happens. For example:
 
-- 어제부터 아팠어요 = I have been sick since yesterday
+- 어제부터 아팠어요 = <span class="md spoiler">I have been sick since yesterday</span>
 - 언제부터 아팠어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-45.mp3" /> = <span class="md spoiler">Since when have you been sick?</span>
 
 _Notice that_ 어제 _and_ 언제 _are not the same word._
 
-- 한국에서 내년까지 있을 거예요 = I will be in Korea until next year
+- 한국에서 내년까지 있을 거예요 = <span class="md spoiler">I will be in Korea until next year</span>
 - 한국에서 언제까지 있을 거예요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-46.mp3" /> = <span class="md spoiler">Until when will you be in Korea?</span>
 
 ---
 
-- 작년부터 한국어를 공부했어요 = I have been studying Korean since last year
+- 작년부터 한국어를 공부했어요 = <span class="md spoiler">I have been studying Korean since last year</span>
 - 언제부터 한국어를 공부했어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-27.mp3" /> = <span class="md spoiler">Since when have you been studying Korean?</span>
 
 언제 can also be attached to “이다” to ask “when” something is. In these cases as well, it replaces the noun that would normally be attached to 이다. For example:
 
-- 결혼식은 내일이야 = The wedding is tomorrow
+- 결혼식은 내일이야 = <span class="md spoiler">The wedding is tomorrow</span>
 - 결혼식은 언제야? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-28.mp3" /> = <span class="md spoiler">When is the wedding?</span>
 
 ---
 
-- 방학은 다음 주야 = Vacation is next week
+- 방학은 다음 주야 = <span class="md spoiler">Vacation is next week</span>
 - 방학은 언제야? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-29.mp3" /> = <span class="md spoiler">When is vacation?</span>
 
 The grammatical principle \~든지 is commonly attached to 언제 to form 언제든지. For now, you can think of this simply as a word that means “whenever.” When you learn about the function of \~든지 in [Lesson 106](https://www.howtostudykorean.com/unit-5/lessons-101-108/lesson-106/ "Lesson 106: Listing Possibilities/Outcomes: ~든지 (간에)"), you will understand how this meaning is formed.
@@ -1383,34 +1385,34 @@ The grammatical principle \~든지 is commonly attached to 언제 to form 언제
 
 어디 works very much like 언제. It can be used to ask “where” something happened if the place is unknown. For example:
 
-- 집에 가고 싶어요 = I want to go home
+- 집에 가고 싶어요 = <span class="md spoiler">I want to go home</span>
 - 어디 가고 싶어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-50.mp3" /> = <span class="md spoiler">Where do you want to go?</span>
 
 ---
 
-- 한국에 살아요 = I live in Korea
+- 한국에 살아요 = <span class="md spoiler">I live in Korea</span>
 - 어디 살아요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-51.mp3" /> = <span class="md spoiler">Where do you live?</span>
 
 _Just like_ 여기, \~에 _is often omitted from_ “어디.” 어디에서 _is often contracted to_ 어디서.
 
 More examples:
 
-- 그것을 집에서 하고 싶어요 = I want to do that at home
+- 그것을 집에서 하고 싶어요 = <span class="md spoiler">I want to do that at home</span>
 - 그것을 어디서 하고 싶어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-30.mp3" /> = <span class="md spoiler">Where do you want to do that?</span>
 
 ---
 
-- 한국에서 왔어요 = I came from Korea
+- 한국에서 왔어요 = <span class="md spoiler">I came from Korea</span>
 - 어디에서 왔어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-53.mp3" /> = <span class="md spoiler">Where are you from (from where did you come?)</span>
 
-The particle \~까지 is commonly attached to 어디. \~부터 is not commonly attached to 어디 for the same reason that \~부터 is not commonly attached to a place, as described in [Lesson 12](https://www.howtostudykorean.com/unit1/unit-1-lessons-9-16/lesson-12/chinese/). For example:
+The particle \~까지 is commonly attached to 어디. \~부터 is not commonly attached to 어디 for the same reason that \~부터 is not commonly attached to a place, as described in [Lesson 12](./12-more-particles.md). For example:
 
-- 부산까지 가고 싶어요 = I want to go until Busan
+- 부산까지 가고 싶어요 = <span class="md spoiler">I want to go until Busan</span>
 - 어디까지 가고 싶어요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-54.mp3" /> = <span class="md spoiler">How far/until where do you want to go?</span>
 
 ---
 
-- 지하철을 서울역까지 탈 거예요 = We will take/ride the Subway until Seoul Station
+- 지하철을 서울역까지 탈 거예요 = <span class="md spoiler">We will take/ride the Subway until Seoul Station</span>
 - 지하철을 어디까지 탈 거예요? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2015/04/Lesson-21-31.mp3" /> = <span class="md spoiler">Until where will we ride the subway?</span>
 
 Like 언제, it can be used as the noun before 이다 to ask where something “is.”
@@ -1450,29 +1452,29 @@ As a pronoun, 누구 can be used in the place of a noun in a sentence – that i
 
 This is the same in English – as you can see in the following three examples:
 
-Who will study Korean tomorrow? – ‘who’ is the subject of the sentence
+- Who will study Korean tomorrow? – ‘who’ is the subject of the sentence
-Who will you meet tomorrow? – ‘who’ is the object of the sentence -“you” is the subject
+- Who will you meet tomorrow? – ‘who’ is the object of the sentence -“you” is the subject
-Who is that person? = ‘who’ is ‘that person’ in the sentence
+- Who is that person? – ‘who’ is ‘that person’ in the sentence
 
 However, this is confusing in English because in all three cases “who” is the first word of the sentence regardless of its role.
 In Korean, instead of always placing ‘who’ at the start of the sentence, it should be placed in the location of the subject (usually the start of the sentence), the object (usually somewhere in the middle of the sentence) or before 이다. I will show you an example of each:
 
 In the third sentence below you can see an example of 누구 being used as a subject. The subject is underlined in each case. When 누구 is used as the subject of a sentence, it is changed to 누가.
 
-- 너는 내일 한국어를 공부할 거야 = You will study Korean tomorrow
+- 너는 내일 한국어를 공부할 거야 = <span class="md spoiler">You will study Korean tomorrow</span>
-- 너는 내일 한국어를 공부할 거야? = Will you study Korean tomorrow?
+- 너는 내일 한국어를 공부할 거야? = <span class="md spoiler">Will you study Korean tomorrow?</span>
 - 누가 내일 한국어를 공부할 거야? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-65.mp3" /> = <span class="md spoiler">Who will study Korean tomorrow?</span>
 
 In the third sentence below you can see an example of 누구 being used as an object. The object is underlined in each case. The object particles can be used if 누구 is the object.
 
-- 너는 내일 친구를 만날 거야 = You will meet a friend tomorrow
+- 너는 내일 친구를 만날 거야 = <span class="md spoiler">You will meet a friend tomorrow</span>
-- 너는 내일 친구를 만날 거야? = Will you meet a friend tomorrow?
+- 너는 내일 친구를 만날 거야? = <span class="md spoiler">Will you meet a friend tomorrow?</span>
 - 너는 내일 누구(를) 만날 거야? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-66.mp3" /> = <span class="md spoiler">Who will you meet tomorrow?</span>
 
 In the third sentence below you can see an example of 누구 being used before 이다:
 
-- 그 사람은 너의 아버지야 = That person is your dad
+- 그 사람은 너의 아버지야 = <span class="md spoiler">That person is your dad</span>
-- 그 사람은 너의 아버지야? = Is that person your dad?
+- 그 사람은 너의 아버지야? = <span class="md spoiler">Is that person your dad?</span>
 - 그 사람은 누구야? <AudioButton src="https://www.howtostudykorean.com/wp-content/uploads/2017/03/Lesson21-67.mp3" /> = <span class="md spoiler">Who is that person?</span>
 
 That’s it for this lesson, but there is still lots for you to know about asking questions in Korean! This lesson covered the first half of what you need to know, and the following lesson ([Lesson 22](https://www.howtostudykorean.com/unit1/unit-1-lessons-17-25-2/lesson-22/)) will cover the rest!