To express an interest: “对……感兴趣 / 有兴趣”
In Chinese, the structures 对……感兴趣 (duì... gǎn xìngqù) and 对……有兴趣 (duì... yǒu xìngqù) are used to express an interest in something or someone (equivalent to “to be interested in...” or “to have an interest in...” in English).
Affirmative form: 对 + Object + 感兴趣 / 有兴趣
Negative form: 对 + Object + 不感兴趣 or 对 + Object + 没(有)兴趣
Note: adverbs of degree such as 很 (very), 非常 (extremely), or 更 (more / even more) must always be placed BEFORE 感兴趣 or 有兴趣 (e.g. 很感兴趣, 非常有兴趣).
Grammar Structure
Affirmative: Subject + 对 + Object + (Degree Adverb) + 感兴趣 / 有兴趣
Negative: Subject + 对 + Object + 不感兴趣 / 没(有)兴趣
Example Sentences
他们对电影感兴趣。
They are interested in movies.
我儿子对打篮球不感兴趣。
My son is not interested in playing basketball.
同学们对汉语有兴趣。你们都对音乐感兴趣吗?
The classmates are interested in Chinese. Are you all interested in music?
我对她更感兴趣。
I am even more interested in her.