第1个回答 2019-03-20
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has,have,had用法 共享文档
2018-06-29 1页 2.13分
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has have had
当主语是(I, we, they)时用have,当主语是第三人称he, she, it 时用has had 是has和have的过去式。
用法:
1、后接过去分词,构成现在和过去完成、完成进行时。例如:
a) He has gone to Beijing. 他已经到北京去了。
b) I have been a teacher since then. 从那时起我就一直当教师。
c) They had left when I got there. 我到那里的时候,他们已经走了。
d) He has been working hard since early morning. 丛一大早他就一直在下劲干活。
2、has have had也可以作为一般动词,意为“拥有”“进行”“吃”“使得”“让”等。如果后接不定式,意为“不得不”。因为它们不是特殊动词,所以不能在它们后面加not构成否定句,不能把它们移到句首构成疑问句。例如:
a) He has a good pen. 他有一支好笔。
b) We have supper at 6:00. 我们六点钟吃晚饭。
c) I had my hair cut yesterday. 我昨天理了发。(我让我的头发被剪了,昨天)
d) I have to leave now. 我得走了。
第2个回答 2019-01-09
来自百度知道认证团队 2018-03-30
区别:三个单词的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。
.用法:
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。
如果是一般过去时:全部都用had
拓展:have been,has been, had been
1.解释:have/has/had+been 都是完成时。
2.区别: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;
3.例句:
(1)He has been doing this work for a period of time.
(2)I want to have this book.
(3)Have you pass the math exam?
(4)Do you ever had a thought that you can win this game?