谁能解释一下have和do的用法
谁能解释一下have和do的用法
have的用法
1)have +过去分词,构成完成时态.例如:
He has left for London. 他已去了伦敦.
By the end of last month,they had finished half of their work.上月未为止,他们已经完成工作的一半.
2)have + been +现在分词,构成完成进行时.例如:
I have been studying English for ten years.我一直在学英语,已达十年之久.
3)have +been +过去分词,构成完成式被动语态.例如:
English has been taught in China for many years.中国教英语已经多年.
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.进了大学以后,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?