I'm sorry to keep you waiting.如何划分句子成份?

问题描述:

I'm sorry to keep you waiting.如何划分句子成份?

I'm sorry to keep you waiting
I----主语
am----系动词
sorry -----表语
to keep you waiting-----动词不定式短语
to keep-----动词
you----to keep的宾语
waiting-----to keep的宾语补足语
这是一个固定句子结构----I'm sorry to do sth (很抱歉做.)