Expressing Cause with “zhī suǒyǐ”
之所以……是因为……
How it works
之所以……是因为…… (zhī suǒyǐ...shì yīnwèi...) marks a reason-result relationship. In natural English, it often corresponds to 'the reason... is that...' or a direct '... because...' construction. It is used for formal, carefully structured explanations.
This is a very common HSK6-level pattern in writing, speeches, and academic explanation.
Example sentences
他之所以一直不愿意表态,是因为他担心自己的意见会影响整个团队的判断。
He has been unwilling to state his position because he worries that his opinion will influence the entire team's judgment.
这项改革之所以迟迟没有推进,是因为很多基础条件到现在还没有真正准备好。
This reform has been delayed because many basic conditions are still not in place.
一个人之所以能够长期保持清醒和克制,是因为他对自己真正想要什么非常清楚。
A person can remain clear-headed and self-controlled over the long term because they clearly understand what they truly want.
Key point
This pattern is useful for formal explanation and often makes reasoning more precise and organized.