必修三 Unit 1 Festicals around the world.Grammar情态动词

1、I can dance.May I come in?Could you please clean your room?What shall we do this evening?I will never do that again.He must be Jin XiuxianFind the sentences in the reading passage (P1) and fill in the blanks. 1. Sometimes celebrations _ be held after hunters had caught animals.2. They also light lam

2、ps and play music because they think that this _ lead the ancestors back to earth.3. For the Japanese festival Obon, people _ go to clean graves and light incense in memory of their ancestors.wouldwillshould4. Festivals _ also be held to honor famous people.5. At the Spring Festival in China, people

3、 eat dumplings, fish and meat and _ give children lucky money in red paper.6. These carnivals _ include parades, dancing in the streets day and night, loud music and colorful clothing of all kinds.canmaymight情态动词的定义情态动词的定义 情态动词表示说话人的情态动词表示说话人的某种感情或语气某种感情或语气，对某，对某一动作或状态的某种态一动作或状态的某种态度。表示度。表示“需要、可以、需要

4、、可以、必须、应当必须、应当”等。等。特点特点：1. 1. 本身本身都有一定的都有一定的词义词义；2. 2. 不能单独做谓语不能单独做谓语；3. 3. 没有人称和数的变化；没有人称和数的变化；4. 4. 后接后接不带不带toto的不定式，的不定式， 即接动词原形。即接动词原形。can与与could- Can/Could I use your dictionary?Yes, you can.1 1) ). .表表能力能力, “, “能能. .会会”.could.could指过去时间指过去时间3). 表示表示“请求请求” “允许允许” (表请求时，口语中常用表请求时，口语中常用could 代替代替

5、 can 使语气使语气更委婉，更委婉，回答时用回答时用can)2). 表示表示推测推测. “可能可能”“或许或许”用于疑问句或否定句用于疑问句或否定句Some of us can use the computer now,but we couldnt last year.Can this news true?I though what he said could not be true.4 4) ). .用于用于疑问句疑问句或或否定句否定句或或感叹句感叹句中时中时, ,表表猜测、猜测、惊讶惊讶、不相信等、不相信等, ,“可能、能够可能、能够”。couldcould猜测猜测的可能性更小的可能性更

6、小。How can you say that? He is an honest man, he couldnt be telling lies. 5 5) ). .用于用于肯定的陈述句肯定的陈述句中中, ,表示表示理论上的可能性理论上的可能性，也可，也可以表示一时的情况。以表示一时的情况。Accidents can happen at any time.It could be very interesting to go out for a drive. ( could 比比can 的可能性小的可能性小)When I was a child, I _ watch TV whenever I w

7、anted to. （2013 江苏）江苏）A. Should B. couldC. must D. needmay与与might1). 表示表示“许可许可”或或“请求请求”，might比比may语气更委语气更委婉客气婉客气。 肯定回答肯定回答_，否定回答时否定回答时_，表示，表示“不可以不可以”或或“禁禁止止”。 - May I come in ? 我可以进来吗？我可以进来吗？ - Yes, you_. 可以，请进来。可以，请进来。 - No, you_. 不，你不能。不，你不能。 2). 表示表示可能性可能性，多用于陈述句，否定用，多用于陈述句，否定用_表示表示“可能可能不不” 。migh

8、t 比比 may可能性小可能性小He _ come today.mustnt或或cantmay/canmay/canmustnt/cantmay notmay not3). may/ might as well + 动词原形动词原形 “还是还是的好的好” You may as well go and have a look.4. may用于祈使句用于祈使句表祝愿表祝愿。 May you succeed! May God bless you!-May I take this book out of the reading room?-No, you _. You read it in here.

9、 （2011 陕西）陕西）A. mightnt B. wontC. neednt D. mustntwill与与would1). 表表“请求、建议请求、建议”等，用等，用 would 比用比用will 委婉，委婉，客气些客气些Will you lend me your book?Would you like a cup of tea?2). 用于表示用于表示意志意志、意愿意愿和决心和决心。 would 指过去指过去的意愿和决心的意愿和决心。Ill never do that again.They said that they would help us.3).表示表示习惯性动作习惯性动作或或某

10、种倾向某种倾向。 译作译作 “总是、总是、惯于惯于” would 指过去指过去。Fish will die without water.Every evening, she would sit by window, deep in thought.4). 用于用于否定句否定句中，表示中，表示“不肯、不乐意不肯、不乐意”No matter what I said, he wont listen to me.-You neednt take an umbrella. It isnt going to rain.-Well, I dont know. It _ do. （2013 北京）北京）A.

11、might B. needC. would D. shouldshall与与should1). shall 用于用于第第一和第一和第三人称三人称的的疑问句中疑问句中，用来用来征求对方意见征求对方意见或向对方请示。或向对方请示。What shall we do this evening？2). shall 用于用于二三人称二三人称的陈述句中，表示说话人的陈述句中，表示说话人命令、命令、警告警告、 许诺和威胁许诺和威胁。You shall fail if you dont work hard.（ ）He shall do it himself. ( )He shall be punished. (

12、 )You shall get an answer from me tomorrow.( ) 警告警告命令命令威胁威胁允诺允诺3). should 表示表示劝告、建议、命令劝告、建议、命令，同义词，同义词ought to；但但ought to多表示责任、义务，语气强烈。多表示责任、义务，语气强烈。 You should keep your promise.Sam suggested that we should go for a swim.4). should用于用于可能性推测可能性推测时时,表表“应该，很可能应该，很可能” They should be at home by now for

13、they have been away for two hours.-I havent got the reference book yet, but Ill have a test on the subject next month.-Dont worry. You _have it by Friday （2010 江苏）江苏）A. could B. shallC. must D. maymust与与cant1 1) ). . mustmust表示表示义务或强烈的劝告义务或强烈的劝告, ,意为意为 必须必须, ,应应该该”, ,其否定式为其否定式为_表示表示“不应该不应该, ,不不许可许可,

14、 ,不准不准, ,禁止禁止”。回答回答 must must 所在的一般疑问句时，所在的一般疑问句时，否定回答用否定回答用_ _ 或或 _._.You must finish your homework first. Children mustnt speak like that to their parents.-Must we finish the work tomorrow? -No, you _ , but you must finish it in three days. mustntneedntneednt/dont have todont have to3) must 表示发生了某

15、种与说话人的愿望相反，表示发生了某种与说话人的愿望相反，不受欢迎的事，意思是不受欢迎的事，意思是“偏偏，偏要偏偏，偏要”。Why it must rain on Sunday?怎么偏偏是星期天下雨？怎么偏偏是星期天下雨？Why must he do it that way?为什么他偏要那样做？为什么他偏要那样做？2). 表表推测推测，用于，用于肯定句肯定句，意为，意为“一定一定”“务必”。Betty must be in the next room.He must be watering the flowers in his garden. 4) 4) cant 用来表示由于特定事实或环境某事

16、用来表示由于特定事实或环境某事肯定不会发生肯定不会发生。-Listen, someone is knocking at the door, who can it be? - It cant be Tom, he has gone abroad.1. Im afraid Mr. Harding _ see you now. Hes busy. （2010 全国）全国）cant B. mustnt C. shouldnt D. neednt2. I have told you the truth. _ I keep repeating it? （2010 江苏）江苏）Must B. Can C.

17、May D. Will 情态动词情态动词 + have done这是历年高考热点之一，这是历年高考热点之一，可表示可表示“推测、责备、怀疑推测、责备、怀疑”等多种意义。等多种意义。一、表示对过去事情的推测或估计一、表示对过去事情的推测或估计1. must have done _eg: The ground is rather wet, so it must have rained last night.2. may/might have done _eg: Tom may have gone to shanghai, but I still not sure about it.3. cant/

18、couldnt have done _eg: The ground is very dry, so it cant have rained last night肯定已经做了某事肯定已经做了某事可能可能/大概已经做了某事大概已经做了某事不可能已经做了某事不可能已经做了某事二、表示对过去所发生事情的遗憾或责备二、表示对过去所发生事情的遗憾或责备1. should/ought to have done _eg: You should have told me about it eariler.2. shouldnt/oughtnt to have done _ eg: You shouldnt ha

19、ve said such words to you mom.3. could/might have done _eg: He could have worked out the problem.过去本该做而没做过去本该做而没做过去不该做的事却做了过去不该做的事却做了本来能够做的事却没做本来能够做的事却没做4. neednt have done _eg: You neednt have walked so quickly since time was enough.5. would rather have done _eg: I would have told you all about the

20、 boys story, but you didnt ask me. 原本不必做的事却做了原本不必做的事却做了本想做却未做成本想做却未做成练习练习用用can, could, might, will, would, shall, should, must填空。填空。 1. People _ die without air or water. 2. _ you mind my smoking here?3. When we were children, we _ sit around Grandpa after supper, listening to his stories.4. That li

21、ght is off. She _ have gone to bed. 5. _ you succeed in whatever you do!willWouldwouldmustMay6. The ground isnt wet. It _ have rained last night. 7. I _ have helped him, but I was busy at that time.8. You _ be punished for what you have done. 9. Peter _ come with us tonight, but he isnt very sure ye

22、t.10. I told your friend how to get to the hotel, but perhaps I _ have driven her there.cant/ couldntshouldshallmayshould1. When I was a child, I _ watch TV whenever I wanted to. A. should B. could C. must D. need2. -You neednt take an umbrella. It isnt going to rain. - Well, I dont know. It _ do. A

23、. might B. need C. would D. should 3. It _ be the postman at the door. Its only six oclock.A. mustnt B. cant C. wont D. neednt B A B4. Since nobody gave him any help, he _have done the research on his own. A. can B. must C. would D. need5. One of our rules is that every student _ wear school uniform

24、 while at school. A. might B. could C. shall D. will B C6. They _ have arrived at lunchtime but their flight was delayed. A. will B. can C. must D. should7. The door _ open, no matter haw hard she pushed. A. shouldnt B. couldnt C. wouldnt D. mightnt8. Im going to Europe on vacation together with John if I _ find the money. A. can B. might C. would D. need9. Whoever can answer one of my questions_ receive a prize. A. must B. shall C. will D. would10. If you _ go, at least wait until the stor