Formal Prepositions 于, 至于, and 因
Learn Formal Prepositions 于, 至于, and 因 with practical HSK 6 examples, focus vocabulary, common pitfalls, and targeted cloze practice.
Pattern
formal preposition + object
Use this HSK 6 pattern to make sentence structure, scope, or emphasis explicit instead of relying on word-for-word English order.
至于细节，我们明天再谈。
When to use Formal Prepositions 于, 至于, and 因
Read formal preposition + object as a sentence tool, not just as vocabulary. First locate the main action or claim, then ask what 至于 adds to it.
这个句子里的至于让意思更清楚。
The 至于 in this sentence makes the meaning clearer.
如果不用至于，句子的重点会不一样。
Without 至于, the sentence focus would be different.
他说得很自然，因为他知道至于的位置。
He spoke naturally because he knew where 至于 belongs.
Common traps
- Do not translate formal preposition + object mechanically from English; check the Chinese word order first.
- Keep 至于 close to the part of the sentence it controls.
- Do not overuse the pattern in every sentence; use it when it adds a clear role.
Vocabulario de apoyo
Targeted drill
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