问题描述：
为什么有的句子加be动词,有的不加?
本人基础好差啊,总问些很简单的问题,呵呵~
I was having dinner at a restaurant .
I have never borrowed any money from you .
have前面怎么一会又be动词,一会没有?
本人基础好差啊,总问些很简单的问题,呵呵~
I was having dinner at a restaurant .
I have never borrowed any money from you .
have前面怎么一会又be动词,一会没有?
问题解答：
我来补答展开全文阅读