It is important for us to learn English分析下这个句子成分,谢谢.

题目

It is important for us to learn English分析下这个句子成分,谢谢.
It is important for us to learn English分析下
这句话中for us 是什么语?
to learn English 是什么语?
整个句子是简单句还是从句?

答案