英语中be,do,have如何应用啊?特别是在什么情况下用do?

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英语中be,do,have如何应用啊?特别是在什么情况下用do?

英语中be,do,have如何应用啊?特别是在什么情况下用do?
英语中be,do,have如何应用啊?特别是在什么情况下用do?

英语中be,do,have如何应用啊?特别是在什么情况下用do?
be
1) be +现在分词,构成进行时态,例如:
They are having a meeting.他们正在开会.
English is becoming more and more important.英语现在越来越重要.
2) be + 过去分词,构成被动语态,例如:
The window was broken by Tom..窗户是汤姆打碎的.
English is taught throughout the world.世界各地都教英语.
3) be + 动词不定式,可表示下列内容:
a.表示最近、未来的计划或安排,例如:
He is to go to New York next week..他下周要去纽约.
We are to teach the freshpersons.我们要教新生.
说明:这种用法也可以说成是一种将来时态表达法.
b.表示命令,例如:
You are to explain this.对此你要做出解释.
He is to come to the office this afternoon.要他今天下午来办公室.
c.征求意见,例如:
How am I to answer him?我该怎样答复他?
Who is to go there?谁该去那儿呢?
d.表示相约、商定,例如:
We are to meet at the school gate at seven tomorrow morning.我们明天早晨7点在校门口集合.
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do
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?
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have
Have有四种用法:
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

LZ可能是初中的英语水平吧
be:be am is are was were
do:do does did done
have:have has had haven
上面是所有这3个动词的变化
be 代表“是”的意思 例如:i am a student 我是个学生
have 代表 “拥有” 例如:i have a watch 我有个手表
d...

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LZ可能是初中的英语水平吧
be:be am is are was were
do:do does did done
have:have has had haven
上面是所有这3个动词的变化
be 代表“是”的意思 例如:i am a student 我是个学生
have 代表 “拥有” 例如:i have a watch 我有个手表
do 没有特别的意思,如果在初中的语法中一般只用到疑问句和反意疑问句,等上了高中大学后do可作为强调句或者虚拟语气出现
例如:i donnot know,do i? 反意疑问句

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