什么是be动词 do动词?我英语基础差

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什么是be动词 do动词?我英语基础差
什么是be动词 do动词?
我英语基础差

什么是be动词 do动词?我英语基础差
be 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

be动词就是am,is,are,were,was&
do动词就是do,did,does,done

be作助动词用的形式如下:
①am, is, are, was, were
②助动词+be:shall be, will be, can be, etc.
③have/has/had + been(完成时)
④am, is, …being(进行时)
(1)表达进行时态
句型 be + V-ing…(进行时态)
例:What are you ...

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be作助动词用的形式如下:
①am, is, are, was, were
②助动词+be:shall be, will be, can be, etc.
③have/has/had + been(完成时)
④am, is, …being(进行时)
(1)表达进行时态
句型 be + V-ing…(进行时态)
例:What are you reading?
(你正在阅读什么?)
I am reading a magazine.
(我正在阅读杂志。)
例:He will be taking a walk in the park at this time tomorrow morning.
(明天早晨此时他将会正在公园散步。)
例:She has been teaching English in our school for years.
(她已在我们学校教英语许多年了。)
解说 第一例句是表达现在进行时,第二例句是将来进行时,第三例句是现在完成进行时。
(2)表达被动语态
句型 be +p.p. …(被动语态)
例:English is spoken in both Canada and the United States.
(加拿大和美国都讲英语。)
例:Those keys were found in your drawer.
(那些钥匙是在你的抽屉里找到的。)
例:It can be done much faster in this way.
(这件工作用这个方法可以更加快速地做好。)

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