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因此 (therefore / for this reason)
IntroducedYour saved position stays in this browser. Resuming does not complete the lesson or answer its questions.
Writing up results
- You are writing a report on why sales of a new drink went up.
- new新产品价格low低，therefore因此very很popular受欢迎。 — "The new product is cheap, and is therefore very popular."
Cause，therefore因此 + result
- therefore因此 = "therefore, for this reason": a formal "so", common in writing.
- It starts the result clause or follows its subject: therefore因此he他to decide (to do something)决定… / he他therefore因此to decide (to do something)决定….
he他every day每天practises练习，therefore因此improves进步very很fast快。
Complete (written): “He practises daily and therefore improves fast.” 他每天练习，____进步很快。
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因此 gives the logical consequence.
After a full sentence too
- 这次to take an exam考试very很important重要。therefore因此，everyone大家must要carefully认真revise复习。 — "This exam is important. Therefore, everyone must revise carefully."
- It can start a new sentence, followed by a comma.
therefore因此，everyone大家must要carefully认真revise复习。
Build: “Therefore, everyone must revise carefully.”
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因此 can open a new sentence.
Do not pair with because因为
- Use due to由于…，therefore因此… or because因为…，so所以…; because因为…，therefore因此… is avoided in careful writing.
- therefore因此 is formal; in chat, so所以 is more natural.
Which pair suits careful writing?
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由于…因此… is the standard written pair.
therefore因此 versus so所以 and and so于是
- so所以 is the everyday "so": it rained下雨(completed / change)了，so所以I我didn't没go去.
- and so于是 tells the next action in a story; therefore因此 gives a logical consequence.
it rained下雨了，so所以I我didn't没go去。
In casual conversation, 所以 sounds more natural than 因此.
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True. 因此 is formal and written; in casual conversation 所以 is the natural word for “so, therefore”.
Recap
- Cause，therefore因此 + result = therefore (formal); it may start a new sentence.
- Pairs with due to由于; everyday speech uses so所以.
Read the full reference: HSK 4 grammar — Cause & effect statements.
You are writing a report on why sales of a new drink went up. Close the examples. Say a Mandarin response, then write it in Chinese. Explain briefly in English what the lesson’s pattern adds. Compare with the model, then change one detail and try again.
This is supported productive practice. Compare meaning and structure; your answer need not copy the model. A partner or teacher must hear the spoken response to comment on pronunciation.