suǒ​yǐ HSK2

therefore

所以 suǒ​yǐ
therefore conjunction
indicates a result, consequence, or conclusion

He was sick, so he didn't go to work.

reason why conjunction
the cause or rationale behind a situation

Frequency

Movie subtitles
1103.4 per million appears in 95% of films
Written text
473.1 per million

Details

HSK 3.0
Level 2

Sources

Definitions
CC-CEDICT