How to use 对；对于
对 / 对于 + object，comment; subject + 对 + person + treatment
对 and 对于 overlap when introducing the object or matter an opinion, understanding, or discussion concerns. 对于 often has a more deliberate or formal sound and can foreground that reference point. This overlap does not mean every 对 can be expanded to 对于. The shorter word participates in more constructions and combines closely with many familiar predicates.
Use 对 in ordinary expressions about treatment or directed behavior, and recognize its verbal meanings such as facing or matching. Forms with 对着 or 对上 belong to those additional uses. Word order and collocation also affect naturalness. Rather than relying on one broad interchangeability rule, learn 对于 as a way to frame a relevant object and 对 through its wider set of patterns.
Examples with pinyin and English
对于这个问题，我有不同的看法。
Regarding this question, I have a different view.
他对工作很认真。
He takes his work very seriously.
她对我很好。
She treats me very well.
他对着镜子笑。
He smiles at himself in the mirror.
这两个数字对上了。
These two numbers match up.
What to remember
- Use 对于 to frame a matter under discussion.
- Keep 对 in established treatment and directed-action patterns.
- Distinguish prepositional 对 from its verbal uses.
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Source and editorial notes
Explanation and examples written for Laowai using the grammar curriculum as a topic reference. The original curriculum credits AllSet Learning’s Chinese Grammar Wiki as used with permission. Read the retained source credits.
Difficulty labels describe the level of the explanation; they are not official HSK placement. Send a correction with this page’s URL.