他对周围的一切都感兴趣 翻译 what's是什么意思 he is interested in what's______ him.

他对周围的一切都感兴趣 翻译 what's是什么意思 he is interested in what's【about】him.
what=the thing which/ that可以再详细一些吗？我才初一。he is interested in what's【about】him.what=the thing which/ that介词in需要介词宾语，is前面需要主语，只有what才能满足此句的需求，你说是吗？