has和had的区别是什么

文/叶丹

has用作第三人称单数形式。has具有吃、有、从事、允许等含义。had通常作动词have的过去式和过去分词,表示得到,也可以用于完成时和过去完成时,表示已经。

has和had的区别是什么

Have you any questions?这个have的意思是有,是实意动词

Do you have any questions?这个have的意思是有,也是实意动词

而do才是助动词

have只有在实意动词时,意思才为有

have在做情态动词时,充当的是助动词,无实际意义

1,动词,“有”的意思。

I have a book。我有一本书。

Do you have a book?

I don’t have a book。(也可以说I haven’t a book。不常用)

2,助动词。“使……”

have sb do 让某人做

have sb doing 让某人一直做

have sb/sth done 某人/某物被……

3,have to,“不得不,必须”,表示不是主观意愿

It’s dark outside,I have to go home。天黑了,我不得不回家。

Do you have to……。

I don’t have to……。

4,用于完成时

have+动词的过去分词

As Warrent's parents,you are to set a good example to him.(表责任,义务,相当于,must should) Are we to clean the corridor,Mrs Dell? (表征求意见=shall)

The temperature is to drop soon.(表示可能性)

Would she get cross if I were to sail into her of lying?(表假设)