It is nice to have a friend to talk,laugh and do things with Certainly.

题目

It is nice to have a friend to talk,laugh and do things with Certainly.
这个句子中最后一词certainly.是不是这样的?having a friend to talk,laugh,and do things with is certainly nice.我是这样理解这句话,

答案

It is nice to have a friend to talk,laugh and do things certainly.这句子是形式主语,真正主语是不定式：to have a friend to talk,laugh and do things certainly.to have a friend to talk,laugh and do things...