be adj to sb 与be adj for sb 区别Smoking is harmful to one's healthIt is necessary for you to get there on time.

问题描述:

be adj to sb 与be adj for sb 区别
Smoking is harmful to one's health
It is necessary for you to get there on time.

be adj for sb 是固定的 it is adj of/for sb to do sth
be adj to sb 是指对于某人 读一下就可以分辨了