Unit2Lesson2UsinglanguageModals(2)Revision情態(tài)動詞課件-高中英語外研版（2019）必修第二冊

1、Unit 2 Lesson 2Using languageModals (2)Revision情態(tài)動詞(Modal verbs)是本身有一定的詞義，表示語氣的單詞。但是不能獨立作謂語，只能和動詞原形一起構(gòu)成謂語。情態(tài)動詞用在行為動詞前，表示說話人對這一動作或狀態(tài)的看法或主觀設(shè)想。Presentationmay&might1.表示請求獲取許可可用May I.? Might I? 表示請求獲取許可；Might I 比May I 更委婉；此時Might不是May的過去式；May/Might I borrow your hat? 我可以借你的帽子嗎？2.表示說話者給予許可在對話中表示說話者給予許可時可

2、用may，可給予現(xiàn)在或?qū)淼脑S可，might無此用法。Amy, you may go now. 艾米，你現(xiàn)在可以走了。（可表示說話者在給艾米許可）He may use my phone. 他可以用我的電話。（可表示說話者在允許他用電話）3.描述某人具備許可做某事描述某人具備許可做某事時，可用may表示現(xiàn)在或?qū)淼脑S可，常用在在正式場合，如官方用語、合同用語等；用might表示過去的許可 The applicant may appeal. 申請者可上訴。 In certain circumstances, a police officer may ask a driver to pull ove

3、r. 在某些情況下，警察可要求司機停車。4. 表示推測可用may或might表示對現(xiàn)在或?qū)淼耐茰y，表示說話人對此不太確定You may/might be right. 你可能是對的。This gift may/might surprise her. 這禮物可能會讓她驚喜。If you ask me, I may/might say yes. 如果你問我，我可能會說是。can /cant /could /couldnt1.表示能力 can表示現(xiàn)在的能力；could表示過去的能力She can read. 她會識字。Andy cant speak English fluently. 安迪不會流利

4、地說英語。When I was young I could jump high. 當我年輕的時候我能夠跳的高。She couldnt read when she was still a child. 當她還是小孩的時候，她不識字。2.表示條件允許，就可以做到的事情，可發(fā)生的事情can表示現(xiàn)在或?qū)砜砂l(fā)生的事；could表示過去可發(fā)生的事The cake can be big or small. 蛋糕可大可小。Years ago we could see the river from here. 很多年前，我們在這里就可以看到河。3.表示請求他人做某事可用 Can you? Could you?

5、 表示請求他人做某事。Could you 比Can you 委婉，此時could不是can的過去式Could/Can you give me the book? 請把書給我，好嗎？Could/Can you open the window please? 請開窗，好嗎？4.表示請求獲取許可可用 Can I? Could I? 表示請求獲取許可。Could I 比Can I 更常用；此時could不是can的過去式Could/Can I have a word with you? 我可以和你說幾句話嗎？Could/Can I use your phone? 我可以用你的電話嗎？5.表示說話者給予

6、許可在對話中表示說話者給予許可時可用can，可給予現(xiàn)在或?qū)淼脑S可，could無此用法。Amy, you can go now. 艾米，你現(xiàn)在可以走了。（可表示說話者在給艾米許可）He can use my phone. 他可以用我的電話。（可表示說話者在允許他用電話）6.描述某人具備許可做某事描述某人具備許可做某事時，可用can表示現(xiàn)在或?qū)淼脑S可，用could表示過去的許可All of us can go now. 我們現(xiàn)在都可以走了。He said we could leave. 他說我們可以離開。7.表示推測用“cant be” 表示“不可能”，表示對現(xiàn)在或?qū)淼耐茰y，體現(xiàn)說話人非常肯

7、定某事是不可能發(fā)生的；The price is too high. That cant be right. 價格太高。那價格不可能是對的。Andy is on holiday. He cant be at work. 安迪在度假，他不可能在上班。must/ mustnt1、表示“必須”，多強調(diào)說話人的主觀看法。2、must和have to 的區(qū)別：（1）must表示說話人的義務(wù)或說話人主觀認為“必須，應(yīng)當”做某事；have to表示由于某種外界原因而“必須，不得不”做某事。即must側(cè)重說明主觀看法，have to強調(diào)客觀需要。（2）must只有一種形式，可用于現(xiàn)在、過去或?qū)頃r，但have

8、to有不同的形式，可用于不同的時態(tài)。（3）在否定句中，dont need to, dont have to, neednt表示沒有義務(wù)；mustnt表示禁止。3、must的否定形式must not/ mustnt 意為“不許，禁止”，表示絕對禁止。若表示“沒必要，不必”，應(yīng)使用neednt或dont have to。注意：對must作否定回答時，不用mustnt，用neednt或dont have to。4、must 表示“偏偏”，指令人不快的事情。5、must用來表示推測，意為i“準是，肯定是”，一般用于肯定句，肯定程度比may,might大的多。Practice 1. You _ retu

9、rn the book now. You can keep it till next week if you like.A. cant B. mustnt C. neednt D. may not2. Where is my pen? I _ it.A. might lose B. would have lost C. should have lost D. must have lost3. I wish I _ you yesterday.A. seen B. did see C. had seen D. were to see4. I didnt hear the phone. I _ a

10、sleep.A. must be B. must have been C. should be D. should have been5. If my lawyer _ here last Saturday, he _ me from going.A. had been; would have prevented B. had been; would prevent C. were; would prevent D. were; would have prevented6. He _ you more help, even though he was very busy.A. might ha

11、ve given B. might have C. may have given D. may give7. If it _ for the snow, we _ the mountain yesterday.A. were not; could have climbed B. were not; could climbC. had not been; could have climbed D. had not been; could climb8. Without electricity human life _ quite difficult today.A. is B. will be

12、C. would have been D. would be9. A computer _ think for itself, it must be told what to do.A. cant B. couldnt C. may not D. might not10. Jenny _ have kept her word. I wonder why she changed her mind.A. must B. should C. need D. wouldKey: 1-5CDCBA 6-10ACDABExercise 1.Look at the sentences from the re

13、ading passage and answer the questions.a That is why Letters from Father Christmas could be the perfect book.b The children must have been very excited as they opened it.C. they might not receive their presents if they were not good.Q:1 What do the words in bold indicate: an order, a request, abilit

14、y or possibility?Q2 Will the meaning of sentence (a) change if we replace could with must or might?Q3 What happens if we change must and might in sentences (b) and (c) into could?Now look for more sentences with modals in the reading passage.2.Rewrite the underlined sentences in the coversation usin

15、g can/cant,may/might and must.(At a fancy dress party.)Chris: I spent ages putting up all the balloons and flowers last night.Jean: I expect you are feeling tired now! You must feel tired now.Chris: Yes, I am. Look, that guy is dressed as Batman. Is that Mike?Jean: Its possibly him. It may be him.Ch

16、eck out that girl over there. Im sure thats Lucy. It must be Lucy.Chris: No, I dont think thats Lucy. It cant be Lucy.Lucy isnt that tall.Jean: Look at those two guys dressed as chickens! Oh,theyrewaving at us! Maybe theyre from our school. They may be from our school.Chris: Lets go and find out.3.L

17、ook at the picture amd make as many sentences as possible using can/could,may/might and must.Black Friday is one of the busiest shoppingdays of the year.Storeshave big sales and open their doors very early.SummarySummarize what we have learnt today.Homework1. We _ last night, but we went to the conc

18、ert instead.A. must have studied B. might study C. should have studied D. would study2. Could I borrow your dictionary? Yes, of course you _.A. might B. will C. can D. should3. Tom ought not to _ me your secret, but he meant no harm.A. have told B. tell C. be telling D. having told4. If he _, he _ that food. Lucki