山东省阳信一中2013届高三英语语法专项复习课件 情态动词

(共29张PPT)
情态动词的用法
情态动词的基本用法特点
1） 情态动词 除 ought 和 have 外，后面只能接动词
原型。 2） 情态动词没有人称，数的变化，即情态动词第
三人称单数不加-s。 3） 情态动词没有非谓语形式，即没有不定式，分
词，等形式。
高中阶段都学过哪些情态动词呢
1 can / could / be able to
2 may/might
3 must / have to
4 shall / should
5 will / would
6 need / dare
7 ought to
1 can / could / be able to
1 Some of us can use computers now, but we
couldn't last year.（能力）
2 It will be sunny in the day time ,but it can
rain later on this evening（客观可能性）
3 ---Can I go now yes ,you can （请求和允许）
4 Could you wait a few days for the memory
（请求）
5 1 Can this news be true
2 It can't be our headmaster.he has gone to
Beijing.（表推测，主要用于否定和疑问）
*be able to 能用于各种时态。
can / could 只能表示现在或过去的能力。
*was / were able to : “设法做成某事”
相当于 managed to do sth.
succeeded in doing sth.。
1. can 与be able to 有何区别？
1. A computer ______ think for itself; it must be told what to do.
A. can’t B. couldn’t
C. may not D. might not
2. The fire spread through the hotel very quickly but everyone ______ get out.
A. had to B. would
C. could D. was able to
A
D
3. They will ______ run this machine on their own in three months.
A. can B. could C. may D. be able to
D
2 may / might
1 May I watch Tv after supper
Yes you may /No ,you mustn't.（请求许可)
2 It may be true ./ she may come tomorrow
/ He might have some fever（推测）
3 May you succeed ! May you have many
more days as happy as this one（祝愿）
may/ might as well 还是 -----好
we may as well stay where we are
5. — Could I borrow your dictionary
— Yes, of course you _______.
A. might B. will C. can D. should
6. — Might I watch TV after supper
— Yes, you ________.
A. may B. must C. might D. can
C
A
3 must 语 have to 的 用法
1 You must come to school on time .
You mustn't waste any more time（必须,禁止）
2 Must I come back before ten
Yes ,you must.
No, you needn't./ don't have to
3 It must be our headteacher.
You must be hungry after a long walk.（推测)
4 I really must go now.
I have to go now,because my mother is in
hospital.( 不得不）
He must be reading, ____ he
You must do it yourself, ____ you
He must have gone over the article, ______he
It must have rained last night, _____ it
3、表推测语气的反意疑问句的构成
isn’t
don’t
hasn’t
didn’t
另外must 还有偏偏一定要的意思
why must you play the piano while others
are sleeping.
7. You ______ return the book now. You can
keep it till next week if you like.
A. can’t B. mustn’t C. needn’t D. may not
8. Johnny, you ______ play with the knife, you
______ hurt yourself.
A. won’t ; can’t B. mustn’t ; may
C. shouldn’t ; must D. can’t ; shouldn’t
C
B
9. --Will you stay for lunch
--Sorry, _____. My brother is coming to see me.
A. I mustn’t B. I can’t
C. I needn’t D. I won’t
10. --May I pick a flower in the garden
-- ________.
A. No, you needn’t B. Not, please.
C. No, you mustn’t D. No, you won’t
B
C
4 shall 与 should
1用于一，三人称疑问句表示征求对方的意见
和 向对方请示
Shall the driver wait What shall we do next
2 用于 二 三人称陈述句表示命令警告，允诺，
威胁以及法律条文规定
You shall go with me / He shall be punished
You shall have the book when I finish it
All the children shall go to school at the age
of seven.
3表示劝告和建议
You should study hard.
4 表推测
They should have arrived by two o'clock
5用于if 条件句表示万一
Ask Tom to ring me up if you should see him.
Shoud I be free tomorrow ,I will come.
6 表竟然
I don't know why you should be so rude to
your mother
Tom’s father promised, “You ___have a new computer if you pass the coming examination,”
A.can B.should
C.shall D.may
C
------When can I come for the photos I need them tomorrow afternoon.
-----They _____be ready by 12 : 00 . (
A. can B. should
C. might D. need
B
You ought to have helped him with his English, ____you
A. won’t you
B. ought not you
C. shouldn’t you
D. wouldn’t you
C
5 will 与 would 的用法
1 表示意志和意愿
I will never do it again.
They said that they would help us.
2 表请求，建议
Will you please take a message for me
Would you please pass him the book
3 表功能
This machine won't work.
4 表示习惯性动作与used to有何区别
Fish will die without water.
Every evening ,he would sit by the window.
6 need 语 dare的用法
既可做实意动词又可做情态动词。做情态动词用于
否定和疑问句而做实意动词可用于肯定，否定疑问
How dare you say such a thing
How dare you to say such a thing
He daren’t to speak English before such a
crowd, did he
He daren’t speak English before such a
crowd, dare he
She _____out alone at night. ( )
A.dare not to go
B. dares not go
C. doesn’t dare to go
D. doesn’t dares go
C
7 ought to 的 用法
1 表应该与 should 的 区别
You ought to take care of him.
You are his father .You ought to get him
to receive good education
2 表推测
He ought to be home by now.
He must be home by now.
一 情态动词+ 完成时表对过去的推测
1 must have done（仅用于肯定句)
2 can't /couldn't have done(用于否定疑问句）
3 may have done （肯定，否定均可)
4 might have done（肯定，否定均可)
二 表虚拟
1 should / could /would /might have done
三 needn't have done
would rather have done
had better have done
Jenny ____with him at that time, for I was having dinner with her in my home. ( )
A.can’t have been
B. mustn’t have been
C. must be
D. may be
A
They are disappointed at the English party. They say that it ___better organized. ( )
A.had been B. had to be
C. must have been D. could have been
D
---- Did you walked home by yourself last night
---- Yes, I did. But I think I _____. ( )
A. needn’t B. shouldn’t
C. may not have D. needn’t have
D
8. We______last night, but we went to the concert instead.
A. must have studied B. might study
C. should have studied D. would study
9. There was plenty of time. She_____.
A. mustn’t have hurried B. couldn’t have hurried
C. mustn’t hurry D. needn’t have hurried
10. Yesterday, Jane walked away from the discussion. Otherwise. She____something she would regret later.
A. had said B. said
C. might say D. might have said.
C
D
D
11. ----Did you scold him for his mistake
----Yes, but______it.
A. I’d rather not do
B. I’d better not do
C. I’d better not have done
D. I’d rather have not done
D