人教版九年級(jí)英語(yǔ)第八單元Unit8 Section A3

1、Unit 8It must belong to Carla.Section APeriod Threelaboratoryoutdoorscoatsleepyn. 實(shí)驗(yàn)室adv. 在戶外；在野外n. 外套；上衣adj. 困倦的；瞌睡的Words ReviewObjectiveTo learn to use must, might, could and cant for making inferences It must be Carlas.It could be Meis hair band.Im not sure, but it cant be a dog.A: Whose volleyba

2、ll is this?B: It must be Carlas. She loves volleyball.A: Whose hair band is this?B: It could be Meis hair band.A: What did you see that night?B: Im not sure. But it cant be a dog. It was bigger. I think it might be a bear or a wolf.Read the sentences below and pay attention to the red words.1. A: Wh

3、ose volleyball is this? B: It _ be Carlas. She loves volleyball.2. A: Whose hair band is this? B: It _ be Meis hair band.3. A: What did you see that night? B: Im not sure. But it _ be a dog. It was bigger. I think it _ be a bear or a wolf.mustcouldcantmight Ready?表推測(cè)的情態(tài)動(dòng)詞情態(tài)動(dòng)詞must, can, may, could, m

4、ight都可以表示推測(cè)。must表示對(duì)現(xiàn)在的狀態(tài)或現(xiàn)在發(fā)生的事情很有把握的推測(cè)， 意為“一定； 準(zhǔn)是”，可能性為100%。 如：You have studied for a long time. Youmust be tired.may, could, might這三個(gè)詞表示的可能性較小， 意為“有可能； 也許”， 可能性占20%至80%。 如：My friend has lost his watch. This may /might / could be his, but Im not sure.cant 表示很有把握的否定推測(cè)， 意為“不可能”， 可能性為0%。 如：The blue mo

5、torbike cant be yourmothers. Hers is yellow.表推測(cè)情態(tài)動(dòng)詞的用法一、根據(jù)被推測(cè)的時(shí)間，確定動(dòng)詞的形式。 Good morning. Ive got an appointment with Miss Smith in the Personnel Department. Ah, good morning. You must be Mrs. Brown. “情態(tài)動(dòng)詞+do”形式：表示對(duì)現(xiàn)在或?qū)?lái)情況的推測(cè)。 Tom is never late for work. Why is he absent today? Something must have hap

6、pened to him.2. “情態(tài)動(dòng)詞 + be + doing”形式：表示對(duì)此時(shí)此刻正在發(fā)生的事情的推測(cè)。He may/might be waiting for us at home.3. “情態(tài)動(dòng)詞+have done”形式：表示對(duì)過(guò)去情況的推測(cè)。二、根據(jù)猜測(cè)語(yǔ)氣的強(qiáng)弱，選擇情態(tài)動(dòng)詞。 在肯定句中表推測(cè)，must語(yǔ)氣最強(qiáng)， 表示“肯定，一定”；could, may, might語(yǔ)氣依次減弱，表示“可能， 也許”。 Some people who dont like to talk much are not necessarily shy; they may just be quiet

7、people.2. 在否定句中表推測(cè)，cant, couldnt語(yǔ)氣最強(qiáng)，表示“不可能”；may/might not語(yǔ)氣較弱，表示“可能不”；mustnt 表示“禁止”，不用于否定推測(cè)。You cant be hungry already you had lunch only two hours ago!must表推測(cè)只用于肯定句，如果要表示否定意義，則要用cant；can表推測(cè)多用于否定句和疑問(wèn)句，而用于肯定句一般指“客觀可能性”，說(shuō)明人或事物一時(shí)的特點(diǎn)。三、某些情態(tài)動(dòng)詞表推測(cè)時(shí)的用法限制。e.g. Tigers sometimes can be very kind.1. I saw Lil

8、y in the supermarket this morning. Oh, it _ be her. She moved to Australia the day before yesterday.2. After a long walk, the children _ be very tired now.3. John _ go with us tomorrow, but he isnt sure.cantmustmay/mightUse proper modal verbs to fill in the blanks.4aChoose the best way to complete e

9、ach sentence using the words in brackets.1. A: Wheres Jean? B: Im not sure. She _ (is/ might be/ must be) in the laboratory.2. A: Everyone is going to the pool after school. B: Really? It _ (must be/ cant be/ could be) hot outdoors.might bemust be3. A: Thats the phone. B: Hmm. I wonder who it _ (mus

10、t be/ could be/ should be).4. A: I wonder if these are Jims glasses. B: They _ (cant be/ might be/ could be) his. He doesnt wear glasses.5. A: I hear water running in the bathroom. B: It _ (could be/ must be/ cant be) Carla. She was thinking of taking a shower.cant becould be/must becould be4bComple

11、te these responses.1. A: Many people are wearing coats. B: The weather must be _ _.2. A: Sally has been coughing a lot. B: She might be _.3. A: This restaurant is always very crowed. B: The food _.4. A: Whenever I try to read this book, I feel sleepy. B: It cant _.getting colderhaving a sore throat/

12、illmust be deliciousbe that boring/cold outsideIwonderiftheseareJimsglasses.我想知道是否這些是吉姆的眼鏡。(4a)【解析】wonderv/n希望知道；驚奇；奇跡（=wanttoknow）wonderfuladj.奇妙的wonderfullyadv.非常好地ChineseWomensVolleyballteamplayed_(wonder)inthematchNowonder+句子“難怪”Nowonderyouareangry.難怪你覺(jué)得生氣。WheneverItrytoreadthisbook,Ifeelsleepy每

13、當(dāng)我試著讀這本書(shū)的時(shí)候，我感到瞌睡。(4b)sleepyadj.困倦的；瞌睡的【解析】sleep(slept;slept)v“睡覺(jué)”sleepyadj.“困倦的；疲憊的” 可做表語(yǔ)和定語(yǔ) feelsleepy感到疲倦sleeping“正在睡覺(jué)的“可做定語(yǔ)和表語(yǔ)thesleepingbaby熟睡的嬰兒asleep“睡著的”,只做表語(yǔ)fallasleep入睡1）Ifyoustayuptoolate,youwillfeel_(sleep)inclassthenextday.2）Keepquiet,kids,Dad_(sleep)inthenextroom.OK,Mum.3）Davidfell_(sl

14、eep)inclassbecausehestayeduptoolatelastnight.4cLook at this picture of a room. How much can you tell about the person who lives here? Is it a boy or a girl? What are his/ her hobbies? Discuss your ideas with a partner.思考題:1.can與could的區(qū)別2.may與might的區(qū)別，以may為首的一般疑問(wèn)句該怎么否定回答？3.must與have to 的區(qū)別；以must為首的一般

15、疑問(wèn)句該怎么否定回答？4.maybe= may be 嗎？can與be able to 怎么使用？ 肯定式否定式其他用法can能，會(huì)可能cant不能，不會(huì)不可能（不會(huì)）1.在口語(yǔ)中can 可以代替may，同理，could也可代替might。2、Could you please?委婉語(yǔ)氣。3、表示否定猜測(cè)，用cant be(不可能）。couldcan的過(guò)去式couldnt不能，不會(huì)不可能（不會(huì)）may 可以可能mustnt/cant不可以，不應(yīng)該不許可mightmay的過(guò)去式(可能性更?。﹎ay not,可能不（表猜測(cè)）must必須應(yīng)當(dāng)一定準(zhǔn)是neednt不必不用表示說(shuō)話人對(duì)事物的肯定推測(cè)時(shí)常用

16、must be。have to 有各種時(shí)態(tài)。mustnt不準(zhǔn)禁止have to 不得不dont have to 沒(méi)必要這么做1. Whose T-shirt is this? It _ be Johns. Its much too small for him. 2. The magazine _ be Lilys, for we can find her name on the cover.3. The man _be my English teacher. He has gone to Canada. 4. Difficulties always go with me! Cheer up!

17、If God closes a door in front of you, there _ be a window opened for you.cantmustcantmustUse proper modal verbs to fill in the blanks.5. Whos singing in the garden? It _ be Mr. Brown. He always practices singing at this time. 6. Is the man over there Mr. Brown? It _ be him. He has gone to Brazil to participate in a conference. 7.The woman _ be our English teacher. She has gone to Canada.