Question

第三人称单数的句子在什么时候have不用变has

如题

Answer 1

不知道你什么年级

所以不太好说

在过去式
http://baike.baidu.com/view/901109.htm
He didn't have lunch./He had lunch.

在过去完成时
http://baike.baidu.com/view/201153.html?wtp=tt
Mr. Smith died yesterday. He had been a good friend of mine.

在将来时
He will have lunch at 8:00.

一般性，在一般现在时中，都是要改成has的（实意动词）

当然，have 的意思很多，还有很多短语。

Answer 2

have 不做实意动词的时候就不用改了

Answer 3

I/They have a book.
He/She has a book.