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?
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
(has为have的三单形式,就是说一般现在时第三人称的时候用has)
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
(does也为do的三单形式)
有借鉴别的地方的