It is easy for him to anwser the question.这里easy不能指人,不是说人简单,所以用的是for him.
It is kind of him to help me.这里kind指的是him,是说他这个人很好,所以用的是of.
所以用for还是of取决于这个形容词是不是形容那个人.是用of,不是用for.
It is easy for him to anwser the question.这里easy不能指人,不是说人简单,所以用的是for him.
It is kind of him to help me.这里kind指的是him,是说他这个人很好,所以用的是of.
所以用for还是of取决于这个形容词是不是形容那个人.是用of,不是用for.