关于important的句型

题目

关于important的句型
有短语：be important to sb
那么下列哪一句型正确：
It's important for sb to do sth.
It's important to sb to do sth.

答案

应当是It's important for sb. to do sth.
因为It's+形容词+for/of sb. to do sth. 是一个句式
用of 时形容词修饰人（即sb.）
如：It's good of you to help me .
用 for 时修饰事情（即sth.）
如：It's impossible for you to do it.