什么是be动词 do动词?我英语基础差

3个回答

  • e 动词就是:be,am,is,are,been,being,was,were.

    当主动词时,“be”在性质上属于接系动词(The Linking Verb),后面要有名词、形容词、地方副词或短语作补足语(The Complement).例如:

    1.The man is a science teacher.

    2.Mary's new dresses are colourful.

    3.I have been there before.

    4.Mother is in the kitchen now.

    “Be”有两种缩写法,如下:

    He's not./He isn't.

    You're not./You aren't...

    但“am + not”的缩写法只有一个:

    I'm not.

    do是个助动词.它的用法如下:

    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?

    助动词还有be,have,shall,will,should,would用法与do类似

    助动词是语法功能词,自身没有词义,不可单独使用,也没有对应的汉译.

    有详细地