所以 suǒ yǐ
“therefore; as a result; so”
conjunctionHSK 2 · 2021 list level 2
新HSK等级2025 HSK 3.0 syllabus level
所以 appears in the November 2025 exam syllabus in the following numbered entry. Levels refer to the listed reading and use, not every meaning.
- Entry 439: 所以 suǒyǐ — Level 2; official annotation 2 (连). PDF page 90
Separate from the HSK 2.0 and 2021 list labels above. Compare the three lists.
用法How to use 所以
所以 means "therefore/so" and introduces the result of a situation. It often appears in the pattern 因为 A，所以 B (because A, therefore B), but 因为 can be left out when the cause is clear. Put 所以 at the start of the result clause.
例句Example sentences
- 今天下雨，所以我没去公园。jīn tiān xià yǔ, suǒ yǐ wǒ méi qù gōng yuán.It rained today, so I didn't go to the park.
- 他生病了，所以没来上课。tā shēng bìng le, suǒ yǐ méi lái shàng kè.He was sick, so he didn't come to class.
- 因为太贵，所以我不买。yīn wèi tài guì, suǒ yǐ wǒ bù mǎi.Because it's too expensive, I'm not buying it.
常见错误Common mistakes
-
✗所以下雨，我没去。
✓因为下雨，我没去。
所以 marks the result, not the reason; use 因为 to introduce the cause.
易混词Easily confused
所以vs因为
因为 introduces the reason (because), while 所以 introduces the result (therefore). Learners often use 所以 where 因为 is needed.