diff --git a/docs/allsetlearning/A2/因为...所以.md b/docs/allsetlearning/A2/因为...所以.md
new file mode 100644
index 0000000..13b4c24
--- /dev/null
+++ b/docs/allsetlearning/A2/因为...所以.md
@@ -0,0 +1,171 @@
+# Cause and effect with "因为" and "所以"
+
+
+
+- 他 学 得 很 快 ,_因为_ 他 很 聪明 。
+
+ - He learns fast because he is smart.
+- 我 爱 吃 四川 菜 ,_因为_ 很 辣 。
+
+ - I love eating Sichuan food because it's very spicy.
+- 我 在 学习 中文 ,_因为_ 我 想 去 中国 。
+
+ - I am studying Chinese because I want to go to China.
+- 我 不 喜欢 她 ,_因为_ 她 不 友好 。
+
+ - I don't like her because she is very unfriendly.
+- 今天 我们 很 忙 ,_因为_ 有 很 多 工作 。
+
+ - We are very busy today because we have lots of work.
+- 汉字 太 难 了,_所以_ 我 不 想 学 。
+
+ - Chinese characters are too hard, so I don't want to study them.
+- 她 很 漂亮,_所以_ 很 多 男孩 喜欢 她。
+
+ - She is beautiful, so a lot of boys like her.
+- 他 找到 工作 了, _所以_ 很 高兴。
+
+ - He found a job so he's happy.
+- 我 太 忙 了,_所以_ 没有 时间 给 你 打 电话。
+
+ - I was too busy, so I didn't have time to give you a call.
+- 我们 公司 有 很 多 外国人,_所以_ 我们 要 说 英文。
+
+ - There are a lot of foreigners in our company, so we need to speak English.
+- _因为_ 我 有 一个 中国 女朋友,_所以_ 我 要 学 中文。
+
+ - Since I have a Chinese girlfriend, I need to study Chinese.
+- _因为_ 他 生病 了,_所以_ 没 去 上课。
+
+ - Since he was sick, he didn't go to class.
+- _因为_ 我 很 累,_所以_ 要 休息。
+
+ - I'm very tired, so I want to rest.
+- _因为_ 太 远 了,_所以_ 我 不 想 去。
+
+ - Since it's too far, I don't want to go.
+- _因为_ 太 忙, _所以_ 我们 没有 时间 吃 中饭。
+
+ - We were too busy, so none of us had time to eat lunch.
+
+
+
+
+
+- Level: [A2](https://resources.allsetlearning.com/chinese/grammar/A2_grammar_points) / [HSK2](https://resources.allsetlearning.com/chinese/grammar/HSK2_grammar_points)
+- Similar to
+ - [Expressing "as a result" with "结果"](https://resources.allsetlearning.com/chinese/grammar/Expressing_%22as_a_result%22_with_%22jieguo%22) (B1)
+ - [Expressing "then…" with "那么"](https://resources.allsetlearning.com/chinese/grammar/Expressing_%22then%E2%80%A6%22_with_%22name%22) (B1)
+ - [Expressing "since" with "既然"](https://resources.allsetlearning.com/chinese/grammar/Expressing_%22since%22_with_%22jiran%22) (B2)
+ - [Expressing "therefore" with "因此"](../B2/因此.md) (B2)
+ - [Stating the effect before the cause](https://resources.allsetlearning.com/chinese/grammar/Stating_the_effect_before_the_cause) (B2)
+ - [Express an action and its effect by using "通过... 是"](https://resources.allsetlearning.com/chinese/grammar/Express_an_action_and_its_effect_by_using_%22tongguo%E2%80%A6_shi%22) (C1)
+ - [Using "because" with "而" to indicate effect](../C1/而.md) (C1)
+- Used for: [Expressing result](https://resources.allsetlearning.com/chinese/grammar/Expressing_result), [Sequencing events in time](https://resources.allsetlearning.com/chinese/grammar/Sequencing_events_in_time), [Indicating cause and effect](https://resources.allsetlearning.com/chinese/grammar/Indicating_cause_and_effect)
+- Keywords: [以](https://resources.allsetlearning.com/chinese/grammar/%E4%BB%A5), [因为](https://resources.allsetlearning.com/chinese/grammar/%E5%9B%A0%E4%B8%BA), [所以](https://resources.allsetlearning.com/chinese/grammar/%E6%89%80%E4%BB%A5)
+
+
+
+You will often come across 因为⋯⋯所以⋯⋯ (yīnwèi... suǒyǐ...) in both written and spoken Chinese. This pattern will give your Chinese a clear logical structure, and can help make you more persuasive.
+
+## Using 因为 (yīnwèi) by Itself to Explain Causes
+
+A common way to explain causes in Chinese is with 因为 (yīnwèi). This is equivalent to "because" in English. Usually 因为 (yīnwèi) will begin a new phrase in a sentence.
+
+### Structure
+
+In this structure, we first state the result, and then give the reason in the next statement after the 因为 (yīnwèi).
+
+Result, 因为 + Reason
+
+### Examples
+
+- 他 学 得 很 快 ,_因为_ 他 很 聪明 。
+
+ - He learns fast because he is smart.
+- 我 爱 吃 四川 菜 ,_因为_ 很 辣 。
+
+ - I love eating Sichuan food because it's very spicy.
+- 我 在 学习 中文 ,_因为_ 我 想 去 中国 。
+
+ - I am studying Chinese because I want to go to China.
+- 我 不 喜欢 她 ,_因为_ 她 不 友好 。
+
+ - I don't like her because she is very unfriendly.
+- 今天 我们 很 忙 ,_因为_ 有 很 多 工作 。
+
+ - We are very busy today because we have lots of work.
+
+## Using 所以 (suǒyǐ) by Itself to Explain Results
+
+Just as 因为 (yīnwèi) can be used to explain causes, 所以 (suǒyǐ) can be used to explain results. This is the equivalent of "so…" or "therefore…" in English.
+
+### Structure
+
+This pattern is similar to the expression using both 因为 (yīnwèi) and 所以 (suǒyǐ), but it leaves out the beginning 因为 (yīnwèi). This structure is more informal.
+
+Reason, 所以 + Result
+
+### Examples
+
+- 汉字 太 难 了,_所以_ 我 不 想 学 。
+
+ - Chinese characters are too hard, so I don't want to study them.
+- 她 很 漂亮,_所以_ 很 多 男孩 喜欢 她。
+
+ - She is beautiful, so a lot of boys like her.
+- 他 找到 工作 了, _所以_ 很 高兴。
+
+ - He found a job so he's happy.
+- 我 太 忙 了,_所以_ 没有 时间 给 你 打 电话。
+
+ - I was too busy, so I didn't have time to give you a call.
+- 我们 公司 有 很 多 外国人,_所以_ 我们 要 说 英文。
+
+ - There are a lot of foreigners in our company, so we need to speak English.
+
+## Using 因为 (yīnwèi) and 所以 (suǒyǐ) Together
+
+The full pattern 因为……所以…… (yīnwèi... suǒyǐ...) is used to clearly indicate cause and effect. They could be thought of as equating to: "Since **_ happened, so _** happened." It sounds weird to use both "since" and "so" in one sentence in English, but it makes everything crystal clear in Chinese.
+
+### Structure
+
+因为 + Cause, 所以 + Effect
+
+This expresses that because of _cause_, therefore there is a _result_.
+
+### Examples
+
+- _因为_ 我 有 一个 中国 女朋友,_所以_ 我 要 学 中文。
+
+ - Since I have a Chinese girlfriend, I need to study Chinese.
+- _因为_ 他 生病 了,_所以_ 没 去 上课。
+
+ - Since he was sick, he didn't go to class.
+- _因为_ 我 很 累,_所以_ 要 休息。
+
+ - I'm very tired, so I want to rest.
+- _因为_ 太 远 了,_所以_ 我 不 想 去。
+
+ - Since it's too far, I don't want to go.
+- _因为_ 太 忙, _所以_ 我们 没有 时间 吃 中饭。
+
+ - We were too busy, so none of us had time to eat lunch.
+
+## See also
+
+- [Stating the effect before the cause](../B2/之所以.md) (advanced article)
+
+## Sources and further reading
+
+### Books
+
+- [HSK Standard Course 2](https://resources.allsetlearning.com/chinese/grammar/HSK_Standard_Course_2) (pp. 44) [Anything Goes (无所不谈) →buy](https://www.amazon.cn/mn/detailApp?_encoding=UTF8&tag=allset-23&linkCode=as2&asin=B001J0ADWA&camp=536&creative=3132&creativeASIN=B001J0ADWA,)
+- [Modern Mandarin Chinese Grammar: A Practical Guide](https://resources.allsetlearning.com/chinese/grammar/Modern_Mandarin_Chinese_Grammar:_A_Practical_Guide) (pp. 272-4) [Anything Goes (无所不谈) →buy](https://www.amazon.cn/mn/detailApp?_encoding=UTF8&tag=allset-23&linkCode=as2&asin=B001J0ADWA&camp=536&creative=3132&creativeASIN=B001J0ADWA,)
+- [Basic Patterns of Chinese Grammar](https://resources.allsetlearning.com/chinese/grammar/Basic_Patterns_of_Chinese_Grammar) (pp. 79) [Anything Goes (无所不谈) →buy](https://www.amazon.cn/mn/detailApp?_encoding=UTF8&tag=allset-23&linkCode=as2&asin=B001J0ADWA&camp=536&creative=3132&creativeASIN=B001J0ADWA,)
+- [Integrated Chinese: Level 1, Part 1 (3rd ed)]() (pp. 108) [Anything Goes (无所不谈) →buy](https://www.amazon.cn/mn/detailApp?_encoding=UTF8&tag=allset-23&linkCode=as2&asin=B001J0ADWA&camp=536&creative=3132&creativeASIN=B001J0ADWA,)
+- [现代汉语虚词例释](https://resources.allsetlearning.com/chinese/grammar/%E7%8E%B0%E4%BB%A3%E6%B1%89%E8%AF%AD%E8%99%9A%E8%AF%8D%E4%BE%8B%E9%87%8A) (pp. 482) [卓越汉语-公司实战篇 →buy](http://amzn.to/2z4g8q6,)
+
+### Websites
+
+- Yale Chinese Usage Dictionary: [How to use 因为 and 由于](http://comet.cls.yale.edu/chineseusagedictionary/0201.html)
diff --git a/docs/allsetlearning/B2/之所以.md b/docs/allsetlearning/B2/之所以.md
new file mode 100644
index 0000000..296a0bf
--- /dev/null
+++ b/docs/allsetlearning/B2/之所以.md
@@ -0,0 +1,103 @@
+# Stating the effect before the cause
+
+
+
+- 她 _之 所以_ 问 这么 多 _是 为了_ 多 关心 你们 。
+
+ - The reason she asks so many questions is in order to she cares about you guys.
+- 我 _之 所以_ 不 喜欢 他 _是 因为_ 他 太 疯狂 了。
+
+ - The reason why I don't like him is because he's too crazy.
+- 我们 _之 所以_ 迟到 了 _是 因为_ 路上 堵车。
+
+ - The reason we were late is because we were stuck in a traffic jam.
+- 小朋友 _之 所以_ 哭 _是 因为_ 我 没有 给 她 买 巧克力。
+
+ - The reason the child is crying is because I didn't buy her chocolate.
+- 路上 _之 所以_ 有 很 多 人 _是 因为_ 今天 天气 好。
+
+ - The reasons there are so many people on the street is because the weather is nice today.
+- 你 _之 所以_ 能 被 录取 _是 因为_ 你 很 优秀。
+
+ - You reason you were accepted is because you are outstanding.
+- 我 _之 所以_ 没 告诉 你 _是 为了_ 不 让 你 担心 。
+
+ - The reason I didn't tell you is that I didn't want you to worry.
+- 他 _之 所以_ 放弃 了 那 份 工作 _是 因为_ 他 找到 了 更好 的 机会 。
+
+ - The reason why he gave up that job was that he found himself a better opportunity.
+- 我们 _之 所以_ 保密 _是 想_ 给 她 一 个 惊喜 。
+
+ - The reason why we kept it a secret is that we wanted to give her a surprise.
+- 公司 _之 所以_ 花钱 培训 你们 _是 想_ 让 你们 越来越 专业 。
+
+ - The reason why the company spends money on your training is to help you become more and more professional.
+
+
+
+
+
+- Level: [B2](https://resources.allsetlearning.com/chinese/grammar/B2_grammar_points) / [HSK5](https://resources.allsetlearning.com/chinese/grammar/HSK5_grammar_points)
+- Similar to
+ - [Cause and effect with "因为" and "所以"](../A2/因为...所以.md) (A2)
+ - [Expressing "as a result" with "结果"](https://resources.allsetlearning.com/chinese/grammar/Expressing_%22as_a_result%22_with_%22jieguo%22) (B1)
+ - [Expressing purpose with "为了"](https://resources.allsetlearning.com/chinese/grammar/Expressing_purpose_with_%22weile%22) (B1)
+ - [Expressing "due to…" with "由于"](https://resources.allsetlearning.com/chinese/grammar/Expressing_%22due_to%E2%80%A6%22_with_%22youyu%22) (B2)
+- Used for: [Sequencing events in time](https://resources.allsetlearning.com/chinese/grammar/Sequencing_events_in_time), [Indicating cause and effect](https://resources.allsetlearning.com/chinese/grammar/Indicating_cause_and_effect)
+- Keywords: [是](https://resources.allsetlearning.com/chinese/grammar/%E6%98%AF), [因为](https://resources.allsetlearning.com/chinese/grammar/%E5%9B%A0%E4%B8%BA), [所以](https://resources.allsetlearning.com/chinese/grammar/%E6%89%80%E4%BB%A5), [于](https://resources.allsetlearning.com/chinese/grammar/%E4%BA%8E), [由于](https://resources.allsetlearning.com/chinese/grammar/%E7%94%B1%E4%BA%8E), [之所以](https://resources.allsetlearning.com/chinese/grammar/%E4%B9%8B%E6%89%80%E4%BB%A5)
+
+
+
+之所以⋯⋯是因为⋯⋯ (zhī suǒyǐ... shì yīnwèi...) can be translated as “the reason why... is because...” and can be used if the speaker wishes to state the effect before the cause. It's normally used in somewhat formal speech.
+
+## Structure
+
+之所以 ⋯⋯ ,是 + 因为 / 为了 / 想 ⋯⋯
+
+## Examples
+
+- 她 _之 所以_ 问 这么 多 _是 为了_ 多 关心 你们 。
+
+ - The reason she asks so many questions is in order to she cares about you guys.
+- 我 _之 所以_ 不 喜欢 他 _是 因为_ 他 太 疯狂 了。
+
+ - The reason why I don't like him is because he's too crazy.
+- 我们 _之 所以_ 迟到 了 _是 因为_ 路上 堵车。
+
+ - The reason we were late is because we were stuck in a traffic jam.
+- 小朋友 _之 所以_ 哭 _是 因为_ 我 没有 给 她 买 巧克力。
+
+ - The reason the child is crying is because I didn't buy her chocolate.
+- 路上 _之 所以_ 有 很 多 人 _是 因为_ 今天 天气 好。
+
+ - The reasons there are so many people on the street is because the weather is nice today.
+- 你 _之 所以_ 能 被 录取 _是 因为_ 你 很 优秀。
+
+ - You reason you were accepted is because you are outstanding.
+- 我 _之 所以_ 没 告诉 你 _是 为了_ 不 让 你 担心 。
+
+ - The reason I didn't tell you is that I didn't want you to worry.
+- 他 _之 所以_ 放弃 了 那 份 工作 _是 因为_ 他 找到 了 更好 的 机会 。
+
+ - The reason why he gave up that job was that he found himself a better opportunity.
+- 我们 _之 所以_ 保密 _是 想_ 给 她 一 个 惊喜 。
+
+ - The reason why we kept it a secret is that we wanted to give her a surprise.
+- 公司 _之 所以_ 花钱 培训 你们 _是 想_ 让 你们 越来越 专业 。
+
+ - The reason why the company spends money on your training is to help you become more and more professional.
+
+## See also
+
+- [Expressing purpose with "为了"](https://resources.allsetlearning.com/chinese/grammar/Expressing_purpose_with_%22weile%22)
+- ["Due to…" with "由于"](https://resources.allsetlearning.com/chinese/grammar/%22Due_to%E2%80%A6%22_with_%22youyu%22)
+- ["Because" with "而" indicating effect](../C1/而.md)
+- [Explaining results with "所以"](https://resources.allsetlearning.com/chinese/grammar/Explaining_results_with_%22suoyi%22)
+- [Cause and effect with "因为" and "所以"](../A2/因为...所以.md)
+
+## Sources and further reading
+
+### Books
+
+- [New Practical Chinese Reader 5 (新实用汉语课本5)]() (pp. 93) [Anything Goes (无所不谈) →buy](https://www.amazon.cn/mn/detailApp?_encoding=UTF8&tag=allset-23&linkCode=as2&asin=B001J0ADWA&camp=536&creative=3132&creativeASIN=B001J0ADWA,)
+- [卓越汉语-公司实战篇](https://resources.allsetlearning.com/chinese/grammar/%E5%8D%93%E8%B6%8A%E6%B1%89%E8%AF%AD%EF%BC%8D%E5%85%AC%E5%8F%B8%E5%AE%9E%E6%88%98%E7%AF%87) (pp. 199) [卓越汉语-公司实战篇 →buy](http://amzn.to/2z4g8q6,)
diff --git a/docs/allsetlearning/B2/因此.md b/docs/allsetlearning/B2/因此.md
index e4b5015..193f517 100644
--- a/docs/allsetlearning/B2/因此.md
+++ b/docs/allsetlearning/B2/因此.md
@@ -39,7 +39,7 @@
- Level: [B2](https://resources.allsetlearning.com/chinese/grammar/B2_grammar_points) / [HSK4](https://resources.allsetlearning.com/chinese/grammar/HSK4_grammar_points)
- Similar to
- - [Cause and effect with "因为" and "所以"](https://resources.allsetlearning.com/chinese/grammar/Cause_and_effect_with_%22yinwei%22_and_%22suoyi%22) (A2)
+ - [Cause and effect with "因为" and "所以"](../A2/因为...所以.md) (A2)
- [Expressing "and then" with "于是"](./于是.md) (B2)
- [Expressing "in short" with "总之"](../C1/conjunctions/总之.md) (C1)
- Used for: [Indicating cause and effect](https://resources.allsetlearning.com/chinese/grammar/Indicating_cause_and_effect)