助动词be, have, do的用法
来源:范文都 本文已影响2.71W人
来源:范文都 本文已影响2.71W人
本站:助动词:辅助其他动词构成时态、语态、疑问句式、否定名式的动词。下面我们一起看看这篇《助动词be, have, do的用法》。
, am, is, are, was, were, being, been的用法。
1)后接-ing式动词构成进行时态
I am doing my homework.
我在做家庭作业。(在谓语动词中的第一位)
She will be sitting here.
她将会坐在这里。(在谓语动词中的第二位)
What have you been doing?
你刚才一直在干什么?(在谓语动词中的第二位)
2)后接过去分词构成被动语态
He is fired.
他被解雇了。
Jane was criticized at that moment.
珍妮那时受到了批评。
3)后接不定式代替将来时,表示即将发生、计划要做的事情
You are to meet them at theairport.
你去机场接他们。
, has, had的用法
1)后接过去分词构成完成时态或者完成进行时态
We have received your letter.
我们已收到你的信。
He has been working for 18 hours.
他一直工作18个小时了。
2)后接不定式表示“必须或者不得不”
She has to give it up.
她必须放弃它。
They had to give in.
他们不得不屈服。
, does, did的用法
1)构成疑问式和否定式
Do you love sports or music?
你喜欢体育还是音乐?(疑问式)
Jack does not speak Chinese.
杰克不会说中文。(否定式)
2)加强语气
I do have two kites.
我确实有两只风筝。
He did come very late.
他确实来得很晚。
3)替代前面的动词,以免重复
Do you want us to join you? ——Yes,I do.
你想要我们加入你们吗?——是的,我想要。
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