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1、Unit 8 It must belong to Carla.Section A Grammar Focus 4c It could be _. It also might be _.Can you guess what it is?three birdsa beautiful face課前預習Can you guess what it is? It could be _. It also might be _.a white vasetwo faces課前預習It could be _.It also might be _.Can you guess what it is?a dogtwo

2、girls課前預習 Could A be bigger than B? In fact, A and B must be _.Which one is bigger, A or B?ABthe same sizeNo.課前預習Whose volleyball is this?It must be Carlas. She loves volleyball.Whose hair band is this?It could be Meis hair band. Or it might belong to Linda. They both have long hair.What did you see

3、 that night?Im not sure, but it cant be a dog. It was bigger. I think it might be a bear or a wolf.Grammar Focus Use “must” to show that you think something is probably true.Use “might” or “could” to show that you think something is possibly true.Use “cant ” to show that you are almost sure somethin

4、g is not true.Grammar Focus表示推測的情態(tài)動詞有表示推測的情態(tài)動詞有must, may, could, might, can。 (1) must表示說話人對事物的推測可能性的程度非常大，表示說話人對事物的推測可能性的程度非常大，意為意為“一定；準是一定；準是”；表示有把握的否定推測時用表示有把握的否定推測時用cant，意意為為“不可能不可能”。如：。如：1. I cant find my keys. I must have left them at home.2. - Is she Mary? - That cant be her. Shes in hospital.

5、Grammar Focus (2) can表示表示“可能可能”，常用于否定句、疑問句中，常用于否定句、疑問句中。could為為can的過去式，表示推測的語氣較的過去式，表示推測的語氣較can弱。弱。如：如：- Can the man there be our math teacher?- He may be, but I am not sure. Grammar Focus (3) may意為意為“也許也許”。might為為may的過去式，的過去式，表示說話人對現(xiàn)在或將來不太確定的可能性的推測。表示說話人對現(xiàn)在或將來不太確定的可能性的推測。如：如：Li Ming might get here

6、in time, but I am not sure.Grammar Focus意思意思推測程度推測程度must一定，肯定一定，肯定100%的可能性的可能性maymight/could有可能，有可能，也許也許20%-80%的可能性的可能性cant不可能，不可能，不會不會可能性幾乎為零可能性幾乎為零1. Whos singing in the next room? It _ be her. She has gone to New York. A. cant B. must C. shouldnt D. can【解析】考查情態(tài)動詞表推測。表示否定推測時，【解析】考查情態(tài)動詞表推測。表示否定推測時，

7、用用cant，意為，意為“一定不一定不”。must表示推測時，表示推測時，意為意為“一定一定”，用于肯定句；根據(jù)答語，用于肯定句；根據(jù)答語“她已她已經去了紐約經去了紐約”可知是否定推測，故選可知是否定推測，故選A。例題解析 A2. Whose T-shirt is this?It _ be John s. Its _ small for him. A. cant; much too B. cant; too much C. mustnt; much too D. mustnt; too much【解析】情態(tài)動詞的用法。根據(jù)句意【解析】情態(tài)動詞的用法。根據(jù)句意“它不可能是約翰的，它不可能是約翰的

8、，對他來說太小了。對他來說太小了?！惫逝懦逝懦鼵、D，too much為為“太多太多”的的意思，意思，much too為為“太太”。故選。故選A。例題解析3. Where are you going this month? We_ go to Xiamen, but were not sure. A. neednt B. must C. might D. mustnt【解析】【解析】 neednt (不必不必)表建議；表建議； must (一定一定)表猜測的可表猜測的可能性很大；能性很大； might (可能，也許可能，也許)表不是很肯定的猜測。表不是很肯定的猜測。 mustnt(不允許不允

9、許)表命令。句意：表命令。句意：-這個月你們將去哪？這個月你們將去哪？-我們或許去廈門，但還不確定。我們或許去廈門，但還不確定。C例題解析4. - Have you decided where to go for your summer vacation?- Not yet. We _ go to Qingdao. Its a good place for vacation. A. may B. need C. must【解析】句意：【解析】句意：- 你已經決定到哪里過暑假了嗎？你已經決定到哪里過暑假了嗎？- 還沒還沒有呢，我們也許去青島，那是個度假的好地方。情態(tài)動詞表有呢，我們也許去青島，那

10、是個度假的好地方。情態(tài)動詞表示推測時，示推測時，may表表“可能可能”，must表表“一定一定”，cant表表“不不可能可能”。 A例題解析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. 4a Choose the best way to complete

11、 each sentence using the words in the brackets.might bemust bePractice3. A: Thats the phone. B: Hmm. I wonder who it _ (must 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 ba

12、throom. B: It _ (could be / must be / cant be) Carla. She was thinking of taking a shower.could becant bemust bePractice4B COMPLETE THESE RESPONSES1. 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 crowe

13、d. B: The food _ .4.A: Whenever I try to read this book, I feel sleepy. B: It cant _.be interesting coldillmust be deliciousPractice 4c Look 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.A: It could be a girls room because its very tidy.B: I guess so. But it might be a boys room because the clothes look like boys clothes.Practice