It is very kind of him to cook food for his mother.为什么用kind of
问题描述：
It is very kind of him to cook food for his mother.为什么用kind of
答
这里的kind of 不是一个词组,是分开的,kind作形容词,是亲切的,体贴的意思,整句翻译过来是：他很体贴的去为他母亲做饭吃.