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1、情態(tài)動詞的基本用法特點情態(tài)動詞的基本用法特點1） 情態(tài)動詞情態(tài)動詞 除除 ought 和和 have 外，后面只能接動詞外，后面只能接動詞 原型。原型。2） 情態(tài)動詞沒有人稱，數(shù)的變化，即情態(tài)動詞第情態(tài)動詞沒有人稱，數(shù)的變化，即情態(tài)動詞第 三人稱單數(shù)不加三人稱單數(shù)不加-s。3） 情態(tài)動詞沒有非謂語形式，即沒有不定式，分情態(tài)動詞沒有非謂語形式，即沒有不定式，分 詞，等形式。詞，等形式。 高中階段都學過哪些情態(tài)動詞呢高中階段都學過哪些情態(tài)動詞呢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（客觀可能性客觀可能性）3 -Can I go now ? yes ,you can （請求和允許請求和允許）4 Could you wait a few days for the memory?（請求請求）5

3、1 Can this news be true? 2 It cant be our headmaster.he has gone to Beijing.（表推測，主要用于否定和疑問表推測，主要用于否定和疑問） *be able to 能用于能用于各種時態(tài)各種時態(tài)。 can / could 只能表示只能表示現(xiàn)在現(xiàn)在或或過去過去的能力的能力。 *was / were able to : “設(shè)法做成某事設(shè)法做成某事” 相當于相當于 managed to do sth. succeeded in doing sth.。1. can 與與be able to 有何區(qū)別有何區(qū)別？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.（請求許可請求許可)2 It may be true ./ she may come tomorrow/ He might have some fever（推測推測）3 May you succeed ! May you have many more days as happy as this one（祝愿祝愿）may/ might as well 還是還是 -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 語語 have to 的的 用法用法1 You must come to school on time .You mustnt waste any more time（必須（必須,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.（推測（推測)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、表推測語氣的反意疑問句的構(gòu)成、表推測語氣的反意疑問句的構(gòu)成isntdonthasntdidnt另外另外must 還有偏偏一定要的意思還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 與與 should1用于一，三人稱疑問句表示征求對方的意見用于一，三人稱疑問句表示征求對方的意見和和 向?qū)Ψ秸埵鞠驅(qū)Ψ秸埵?Shall the driver wait ?What shall we do next ?2 用于用于 二二 三人稱陳述句表示命令警告，允諾，三人稱陳述句表示命令警告，允諾，威脅以及法律條文規(guī)定威脅以及法律條文規(guī)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表示勸告和建議表示勸告和建議You should study hard.4 表推測表推測They should have arrived by two oclock5用于用于if 條件句表示萬一條件句表示萬一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 p h o t o s ? I n e e d t h e m tomorrow afternoon.-They _be ready by 12 : 00 . ( A. can B. shouldC. might D. need B You ought to have

13、 helped him with his English, _you ? A. wont you B. ought not you C. shouldnt you D. wouldnt youC5 will 與與 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 表請求，建議表請求，建議Will you please take a message for me?Would you please pass him the book?3 表功能表功能This machin

14、e wont work.4 表示習慣性動作與表示習慣性動作與used to有何區(qū)別有何區(qū)別Fish will die without water.Every evening ,he would sit by the window.6 need 語語 dare的用法的用法既可做實意動詞又可做情態(tài)動詞。做情態(tài)動詞用于既可做實意動詞又可做情態(tài)動詞。做情態(tài)動詞用于否定和疑問句而做實意動詞可用于肯定，否定疑問否定和疑問句而做實意動詞可用于肯定，否定疑問How dare you say such a thing?How dare you to say such a thing?He darent to s

15、peak English 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 表應該與表應該與 should 的的 區(qū)別區(qū)別You ought to take care of him.You are his father .You ought t

16、o get him to receive good education2 表推測表推測He ought to be home by now.He must be home by now.一一 情態(tài)動詞情態(tài)動詞+ 完成時表對過去的推測完成時表對過去的推測1 must have done（僅用于肯定句（僅用于肯定句)2 cant /couldnt have done(用于否定疑問句）用于否定疑問句）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 表虛擬表虛擬1 should / could /would /

17、might have 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. (

18、)A.had been 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 haveD8. We_last night, but we went to the concert instead.A. must have studied B. might studyC. should have stud

19、ied D. would study9. There was plenty of time. She_.A. mustnt have hurried B. couldnt have hurriedC. mustnt hurry D. neednt have hurried10. Yesterday, Jane walked away from the discussion. Otherwise. She_something she would regret later.A. had said B. saidC. might say D. might have said.CDD11. -Did you scold him for his mistake?-Yes, but_it.A. Id rather not doB. Id better not doC. Id better not have doneD. Id rather have not doneD