have、 had、 has的用法和区别是什么？

have、had、has的用法和区别：

1、have、had、has区别在于不同时态和不同人称之间，三个单词其实表达为一个意思。

2、如果是一般现在时，第三人称单数的时候用has，其它（如第一人称和第二人称）用have。

3、如果是一般过去时，全部都用had。

4、has/have been是现在完成时，has用于第三人称单数，had been过去完成时，跟前者相比，比前者更为过去。

have

1、Alex has already gone?

亚历克斯已经走了。

2、When I met her, she had just returned from a job interview?

我遇见她时，她刚参加完一场求职面试回来。

3、You haven't sent her away, have you

你还没有把她送走，是吗？

4、He arrived in San Francisco, having left New Jersey on January 19th?

1月19日离开新泽西后，他到了旧金山。

5、I went out and had a walk around?

我出去在周围散了一会儿步。

had

1、Had he succeeded, he would have acquired a monopoly?

要是他当时成功了，他就会取得垄断地位。

2、If your customer thinks he's been had, you have to make him happy.?

要是顾客感觉自己当了冤大头，你就得设法让他消气。

3、Unless she loses some weight, she's had it?

除非她减点儿肥，否则她就没戏了。

4、I've had it. Let's call it a day?

我受不了了。今天就到这儿吧。

5、Had I known what the problem was, we could have addressed it.?

如果我当时知道问题出在哪里，我们就可以设法解决了。

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