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How many books do you have?句中do是代表什么意思?

来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:英语作业 时间:2024/04/29 02:44:38
How many books do you have?句中do是代表什么意思?
句子在什么情况下才用do?
How many books do you have?句中do是代表什么意思?
助动词,只起到语法结构的作用
助动词do 的用法
1) 构成一般疑问句,例如:
Do you want to pass the CET? 你想通过大学英语测试吗?
Did you study German? 你们学过德语吗?
2) do + not 构成否定句,例如:
I do not want to be criticized. 我不想挨批评.
He doesn't like to study. 他不想学习.
In the past, many students did not know the importance of English. 过去,好多学生不知道英语的重要性.
3) 构成否定祈使句,例如:
Don't go there. 不要去那里.
Don't be so absent-minded. 不要这么心不在焉.
说明: 构成否定祈使句只用do,不用did和does.
4) 放在动词原形前,加强该动词的语气,例如:
Do come to my birthday party. 一定来参加我的生日宴会.
I did go there. 我确实去那儿了.
I do miss you. 我确实想你.
5) 用于倒装句,例如:
Never did I hear of such a thing. 我从未听说过这样的事情.
Only when we begin our college life do we realize the importance of English.
只有在开始大学生活时我们才认识到英语的重要性.
说明: 引导此类倒装句的副词有never, seldom, rarely, little, only, so, well等.
6) 用作代动词,例如:
---- Do you like Beijing? --你喜欢北京吗?
---- Yes, I do. --是的,喜欢.(do用作代动词,代替like Beijing.)
He knows how to drive a car, doesn't he?
他知道如何开车,对吧?