book3_unit2_Grammar_3 modal verbs

1、 GrammarGrammarModal VerbsModal VerbsWarming-up: Watch the following video clip and Warming-up: Watch the following video clip and write down the Modal Verbs you hear.write down the Modal Verbs you hear.shadow n. 影子影子wanna=want tosigh vi. 嘆息嘆息make-up n. 化妝化妝Could you point out the usage of the Modal

2、 Verbs?Could you point out the usage of the Modal Verbs? May it be the shadows call May it be you journey on We might as well be strangers in another town. I cant get you out of my head. I know I can be what I wanna be. You mustnt sigh and you mustnt cry. The show must go on. My make-up may be fadin

3、g but my smile still stays on. It must be love. Should I stay or should I go?wishwishmay/might as well doabilityabilitynecessity/prohibitionnecessitypossibilityguessingrequestRevisionRevision 1. What modal verbs have we learned in the last unit?2. What do those modal verbs have in common?Can /couldM

4、ay/mightWill/wouldShall/shouldMust/cant-They are always followed by the infinitive without “to”. Can do, should do, etc.-They are the same for all the pronouns.I can , He can, She can , They can, etc.-They dont need auxiliaries. They take direct negative and question forms.I should not(shouldnt). We

5、 must not.(mustnt)Should I .? Must we?-They never combine with another modal verb.You should can. -You should be able to -He will must.-He will have toBe able to, have toSemi-modalsWhatWhat should/shouldnshould/shouldnt t we do to keep healthy?we do to keep healthy? If youIf youd like to give advice

6、 or opinions, you can used like to give advice or opinions, you can use should/ ought to/ had better doshould/ ought to/ had better doWhatWhat oughtought wewe toto do to keep healthy?do to keep healthy? The temperature has dropped sharply and there is a serious disease called flu these days. It spre

7、ads easily among people in spring and autumn. The flu is a serious disease, but we dont have to be afraid of it. We can do something to prevent it. But how? We should eat more vegetables and fruits.We ought to keep the air fresh all the time. We ought to keep away from crowded places. Wed better dri

8、nk more water every day. Situational Dialogues:Should/ought to : for recommendation or adviceShould/ought to : for recommendation or advice You should get more fruits and vegetables. You ought to get more fruits and vegetables. Is there any difference in meaning between the two sentences? NO. The me

9、aning is the same. “ought to”is more often in British NO. The meaning is the same. “ought to”is more often in British English.English.Should Should Ought toOught toPresent Present You should eat less junk food.You should eat less junk food.You ought to eat less junk food.You ought to eat less junk f

10、ood.PastPastYou should have gone to the party.You should have gone to the party.You ought to have gone to the You ought to have gone to the party.party.FutureFutureYou should work harder next term.You should work harder next term.You ought to work harder next term.You ought to work harder next term.

11、I am too slim. I am too slim. What kind of foodWhat kind of food mustmust I I eat to be strong? eat to be strong? must / have to You must/have to eat more body-building food.You must/have to quit smoking.You must/have to exercise more.MustMust I finish the task right now? I finish the task right now

12、?Yes, you Yes, you mustmust/ you have to./ you have to.No, you No, you neednneednt t / you / you dondont have t have toto. .She called me yesterday evening She called me yesterday evening but I didnbut I didnt hear it.t hear it. I _ (be) asleep.I _ (be) asleep. must have been Situational Dialogues:

13、Your deskmate feels very ill now. What should you do? We must call a doctor now.We must go to ask Mr. Tan Pan for help. To express a necessity felt by the speaker. Must we hand our cellphones in to Tan Pan? We have to hand our cellphones in to Tan Pan.We mustnt use the cellphone during class. “mustn

14、t”:to express a prohibition(禁止). must/have to : for obligationmust/have to : for obligation Is there any difference in meaning between the two sentences? Yes. mustexpresses an external(Yes. mustexpresses an external(外部的) obligation in positive ) obligation in positive sentences.sentences. We have to

15、 hand our cellphones in to Tan Pan.We must study hard for a better future. She has failed the exam. She has to retake it. She has passed the exam. She doesnt have to retake it. I must/need to finish my work today. I dont need to finish my work today.“need to”is a softer alternative to both “must”and

16、 “have to”. mustntneednt shouldnt cant表示否定的情態(tài)動(dòng)詞的用法表示否定的情態(tài)動(dòng)詞的用法: 不準(zhǔn)不準(zhǔn), , 禁止禁止沒必要沒必要 ( = don ( = dont have to )t have to )不應(yīng)該不應(yīng)該 ( = ought not to ) ( = ought not to )不能，不可能不能，不可能 Could you use them to make sentences?What modal verbsmodal verbs have you learned? can/could can/could may/ might may/ migh

17、t will/ wouldwill/ would shall/ should shall/ should had better had better must have to need must have to need ought to ought to 情態(tài)動(dòng)詞能表示時(shí)態(tài)嗎？1. 1. 表示對(duì)現(xiàn)在的推測(cè)表示對(duì)現(xiàn)在的推測(cè)2. 2. 表示對(duì)過去的推測(cè)表示對(duì)過去的推測(cè)3.3.表示對(duì)將來的推測(cè)表示對(duì)將來的推測(cè)表示推測(cè)表示推測(cè)情態(tài)動(dòng)詞的重要用法情態(tài)動(dòng)詞的重要用法肯定的推測(cè)肯定的推測(cè)可能的推測(cè)可能的推測(cè)否定的推測(cè)否定的推測(cè)疑問的推測(cè)疑問的推測(cè)must 對(duì)將來對(duì)將來 對(duì)現(xiàn)在對(duì)現(xiàn)在 對(duì)過去對(duì)過去情態(tài)動(dòng)詞情

18、態(tài)動(dòng)詞may, might cant, couldntcan, could + V. + V. + have done常見常見must be + be doing + V. + V. + have done + be doing 可以用可以用not表示表示“可能不可能不” +V. + V. + have done + be doing+ V. + V. + have done + be doingYou look tired. You _ go to bed now.You look tired. You _ go to bed now.should ought to had better M

19、y mother cooked a lot My mother cooked a lot of food for me. She hasof food for me. She hasbeen cooking all the morningbeen cooking all the morning. .She She mustmust be tired now. be tired now.I have just eaten a lot of food for lunch.I have just eaten a lot of food for lunch.You You cancant t be h

20、ungry now. be hungry now. My house is near the railway.My house is near the railway. It _ be noisy there.It _ be noisy there. mustmust The old restaurant The old restaurant _ be very good. _ be very good. It Its always full of s always full of people.people. The new restaurant The new restaurant _ b

21、e very good. _ be very good. It Its always empty.s always empty. must cant Where is Jane?Where is Jane?Perhaps she is reading newspapers.Perhaps she is reading newspapers. =She _ (read) =She _ (read) newspaper.newspaper. may be reading In China, many children _ wear uniform when they go to In China,

22、 many children _ wear uniform when they go to school.school.have to DonDont tell anybody what I said. You _ keep it a secret.t tell anybody what I said. You _ keep it a secret.must The floor is clean. You _ sweep it.The floor is clean. You _ sweep it.neednt The floor is clean. You _ swept it.The flo

23、or is clean. You _ swept it.must haveYou are carrying a lot of things. You canYou are carrying a lot of things. You cant open the door t open the door yourself. Thereyourself. Theres a man standing near the door. You say to s a man standing near the door. You say to him:him:_ you open the door, plea

24、se?_ you open the door, please?Could 1. By lunchtime they would all be sold. 2. His restaurant ought to be full of people.3. What could have happened?4. Nothing could have been better.5. Something terrible must have happened.6. I will take all that fat off you in two weeks. 7. He could not believe h

25、is eyes.8. He wondered if he should go to the library to find out.9. He couldnt have Yong Hui getting away with telling people lies.10. He had better do some research.11. After eating in the restaurant people would become fired very quickly. Intention B. Duty C. Promise Intention B. Duty C. Promise D. Possibility E. GuessingD. Possibility E. Guessing(D)(D)(E)(A)(B)(A)(B B)(D)(C)(D)(D)1 SA