高中英语情态动词课件

1、情态动词的基本用法特点情态动词的基本用法特点1） 情态动词情态动词 除除 ought 和和 have 外，后面只能接动词外，后面只能接动词 原型。原型。2） 情态动词没有人称，数的变化，即情态动词第情态动词没有人称，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，分情态动词没有非谓语形式，即没有不定式，分 词，等形式。词，等形式。 高中阶段都学过哪些情态动词呢高中阶段都学过哪些情态动词呢1 can / could / be able to2 may/might3 must / have to4 shall / should5 will /

2、would6 need / dare7 ought to1 can / could / be able to1 Some of us can use computers now, but we couldnt last year.（能力能力）2 It will be sunny in the day time ,but it can rain later on this evening（客观可能性客观可能性）3 -Can I go now ? yes ,you can （请求和允许请求和允许）4 Could you wait a few days for the memory?（请求请求）5

3、1 Can this news be true? 2 It cant be our headmaster.he has gone to Beijing.（表推测，主要用于否定和疑问表推测，主要用于否定和疑问） *be able to 能用于能用于各种时态各种时态。 can / could 只能表示只能表示现在现在或或过去过去的能力的能力。 *was / were able to : “设法做成某事设法做成某事” 相当于相当于 managed to do sth. succeeded in doing sth.。1. can 与与be able to 有何区别有何区别？1. A computer

4、 _ think for itself; it must be told what to do. A. cant B. couldnt C. may not D. might not2. The fire spread through the hotel very quickly but everyone _ get out. A. had to B. would C. could D. was able toA A D D 3. They will _ run this machine on their own in three months.A. can B. could C. may D

5、. be able toD D 2 may / might1 May I watch Tv after supper? Yes you may /No ,you mustnt.（请求许可请求许可)2 It may be true ./ she may come tomorrow/ He might have some fever（推测推测）3 May you succeed ! May you have many more days as happy as this one（祝愿祝愿）may/ might as well 还是还是 -好好we may as well stay where we

6、 are5. Could I borrow your dictionary? Yes, of course you _. A. might B. will C. can D. should6. Might I watch TV after supper? Yes, you _. A. may B. must C. might D. canC C A A 3 must 语语 have to 的的 用法用法1 You must come to school on time .You mustnt waste any more time（必须（必须,禁止）禁止）2 Must I come back

7、before ten ? Yes ,you must. No, you neednt./ dont have to3 It must be our headteacher. You must be hungry after a long walk.（推测（推测)4 I really must go now. I have to go now,because my mother is in hospital.( 不得不）不得不）He must be reading, _ he?You must do it yourself, _ you?He must have gone over the ar

8、ticle, _he?It must have rained last night, _ it?3、表推测语气的反意疑问句的构成、表推测语气的反意疑问句的构成isntdonthasntdidnt另外另外must 还有偏偏一定要的意思还有偏偏一定要的意思why must you play the piano while othersare sleeping.7. You _ return the book now. You can keep it till next week if you like. A. cant B. mustnt C. neednt D. may not8. Johnny

9、, you _ play with the knife, you _ hurt yourself. A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; shouldntC C B B 9. -Will you stay for lunch? -Sorry, _. My brother is coming to see me. A. I mustnt B. I cant C. I neednt D. I wont10. -May I pick a flower in the garden? - _. A. No, you nee

10、dnt B. Not, please. C. No, you mustnt D. No, you wontB B C C 4 shall 与与 should1用于一，三人称疑问句表示征求对方的意见用于一，三人称疑问句表示征求对方的意见和和 向对方请示向对方请示 Shall the driver wait ?What shall we do next ?2 用于用于 二二 三人称陈述句表示命令警告，允诺，三人称陈述句表示命令警告，允诺，威胁以及法律条文规定威胁以及法律条文规定You shall go with me / He shall be punished You shall have th

11、e book when I finish itAll the children shall go to school at the age of seven.3表示劝告和建议表示劝告和建议You should study hard.4 表推测表推测They should have arrived by two oclock5用于用于if 条件句表示万一条件句表示万一Ask Tom to ring me up if you should see him.Shoud I be free tomorrow ,I will come.6 表竟然表竟然I dont know why you should

12、 be so rude to your motherToms father promised, “You _have a new computer if you pass the coming examination,” A.can B.should C.shall D.mayC -When can I come for the photos ? I need them tomorrow afternoon.-They _be ready by 12 : 00 . ( A. can B. shouldC. might D. need B You ought to have helped him

13、 with his English, _you ? A. wont you B. ought not you C. shouldnt you D. wouldnt youC5 will 与与 would 的用法的用法1 表示意志和意愿表示意志和意愿I will never do it again.They said that they would help us.2 表请求，建议表请求，建议Will you please take a message for me?Would you please pass him the book?3 表功能表功能This machine wont work

14、.4 表示习惯性动作与表示习惯性动作与used to有何区别有何区别Fish will die without water.Every evening ,he would sit by the window.6 need 语语 dare的用法的用法既可做实意动词又可做情态动词。做情态动词用于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 darent to speak Englis

15、h before such a crowd, did he?He darent speak English before such a crowd, dare he?She _out alone at night. ( ) A.dare not to go B. dares not go C. doesnt dare to go D. doesnt dares goC7 ought to 的的 用法用法1 表应该与表应该与 should 的的 区别区别You ought to take care of him.You are his father .You ought to get him t

16、o receive good education2 表推测表推测He ought to be home by now.He must be home by now.一一 情态动词情态动词+ 完成时表对过去的推测完成时表对过去的推测1 must have done（仅用于肯定句（仅用于肯定句)2 cant /couldnt have done(用于否定疑问句）用于否定疑问句）3 may have done （肯定，否定均可（肯定，否定均可)4 might have done（肯定，否定均可（肯定，否定均可)二二 表虚拟表虚拟1 should / could /would /might have

17、done三三 neednt 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.cant have been B. mustnt 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

18、 B. had to beC. must have been D. could have beenD- Did you walked home by yourself last night ?- Yes, I did. But I think I _. ( )A. neednt B. shouldntC. may not have D. neednt haveD 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. mustnt have hurried B. couldnt have hurried C. mustnt hurry D. neednt have hurried 10. Yesterday,