Structure:

对 + Object + Verb phrase

Meaning:

When using 对 (duì) as a preposition, it is used to indicate “to” or “towards” a object or target. As with all prepositions, some care should be taken when using this particle, as usage of 对 doesn’t always totally “make sense” or correspond to English at all in Chinese grammar.

Examples:

    他 对 我 笑。

    Tā duì wǒ xiào

    He laughs at me.