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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课前预习Can you guess what it is? It could be _. It also might be _.a white vasetwo faces课前预习It could be _.It also might be _.Can you guess what it is?a dogtwo girls课前预习 Could A be bigger than B? In fact, A and B must be _.Which one is bigger, A or B?ABthe same sizeNo.课前预习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 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 something is not true.Grammar Focus表示推测的情态动词有表示推测的情态动词有must, may, could, might, can。 (1) must表示说话人对事物的推测可能性的程度非常大，表示说话人对事物的推测可能性的程度非常大，意为意为“一定；准是一定；准是”；表示有把握的否定推测时用表示有把握的否定推测时用cant，意意为为“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.Grammar Focus (2) can表示表示“可能可能”，常用于否定句、疑问句中，常用于否定句、疑问句中。could为为can的过去式，表示推测的语气较的过去式，表示推测的语气较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意为意为“也许也许”。might为为may的过去式，的过去式，表示说话人对现在或将来不太确定的可能性的推测。表示说话人对现在或将来不太确定的可能性的推测。如：如：Li Ming might get here in time, but I am not sure.Grammar Focus意思意思推测程度推测程度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，也许也许20%-80%的可能性的可能性cant不可能，不可能，不会不会可能性几乎为零可能性几乎为零1. 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】考查情态动词表推测。表示否定推测时，【解析】考查情态动词表推测。表示否定推测时，用用cant，意为，意为“一定不一定不”。must表示推测时，表示推测时，意为意为“一定一定”，用于肯定句；根据答语，用于肯定句；根据答语“她已她已经去了纽约经去了纽约”可知是否定推测，故选可知是否定推测，故选A。例题解析 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】情态动词的用法。根据句意【解析】情态动词的用法。根据句意“它不可能是约翰的，它不可能是约翰的，对他来说太小了。对他来说太小了。”故排除故排除C、D，too much为为“太多太多”的的意思，意思，much too为为“太太”。故选。故选A。例题解析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)表建议；表建议； must (一定一定)表猜测的可表猜测的可能性很大；能性很大； might (可能，也许可能，也许)表不是很肯定的猜测。表不是很肯定的猜测。 mustnt(不允许不允许)表命令。句意：表命令。句意：-这个月你们将去哪？这个月你们将去哪？-我们或许去厦门，但还不确定。我们或许去厦门，但还不确定。C例题解析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：- 你已经决定到哪里过暑假了吗？你已经决定到哪里过暑假了吗？- 还没还没有呢，我们也许去青岛，那是个度假的好地方。情态动词表有呢，我们也许去青岛，那是个度假的好地方。情态动词表示推测时，示推测时，may表表“可能可能”，must表表“一定一定”，cant表表“不不可能可能”。 A例题解析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 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 bathroom. 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 crowed. 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
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