lesson 21 grammar

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 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 14](./14-passive.md) when ~아/어 있다 is used to indicate the passive state of a verb
+- 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