英语人教版九年级全册Unit 8 Grammar Focus.ppt

1、Unit 8,Section A Grammar Focus,Review,Translate the phrases.,outside the window have fun next-door neighbor at first run away feel uneasy have no idea have fun (in) doing sth.,在窗外 玩得高兴 隔壁邻居 最初； 首先 逃跑 心神不安 一点不知道； 没办法 做某事很愉快,- Whose volleyball is this? - It must be Carlas. She loves volleyball. - Whos

2、e book is this? - It must be Marys. J.K. Rowling is her favorite writer. - Whose hair band is this? - It could be Meis.,Read the sentences below, paying attention to the colored parts.,- Whose notebook is this? - It must be Mings. It has her name on it. - Whose French book is this? - It could be Car

3、ols. She studies French. - Whose guitar is this? - It might belong to Alice. She plays the guitar. - Whose T-shirt is this? - It cant be Johns. It is too small for him.,Read more sentences.,must,cant,could might,100% probably true,20%-80% possibly true,0 almost not true,表示推测的情态动词 在英语中，表示对某件事物的确定程度，即

4、表示推测的时候，我们通常会用到以下情态动词: must, might, could, may, cant, couldnt。,可能性： must can/could may/might,can not (cant) could not (couldnt),may not might not,情态动词表推测,一、must must表示可能性最大的肯定推测，意思是“一定、准是”。只能用于肯定句。如果要表示“一定不”，应该用cant。如果询问可能性时，应该用can。 He must know the answers. 他肯定知道答案。 He cant know the answers. 他肯定不知道

5、答案 Can he know the answer? 他知道答案吗？,二、can / could can表示推测“可能性”时，一般用于否定句或疑问句。can在疑问句中意思是“会，可能”。 He cant pick her schoolbag up. 他不可能拿了她的书包。,could 表示某事有可能发生或可能是事实。 Dont eat it. It could go bad. 不要吃它，可能坏了。 The plane could be put off by the storm. 这趟飞机可能会因为暴风雨而推迟。 could 还可用于表示客气、礼貌、委婉的请求语气。 Could you plea

6、se help me with my homework? 你能帮我完成我的家庭作业吗？,三、may / might may, might表示推测“可能性”时，意思是“可能”，“也许”。might不表示过去时态，语气更委婉，可能性更小。may, might表推测时，可用于否定句，但不用于疑问句。 He may / might not be at home, but Im not sure. 他可能不在家，不过我也不确定。,情态动词表示推测可以分为以下几种情况: 情态动词+ do此结构表示对现在或将来情况的推测和判断 Do you know where she is now? I think sh

7、e might travel in Beijing. 情态动词+ be doing此结构表示对现在或将来正在进行的情况的推测和判断。 At this moment, my father cant be working in the office.,情态动词+ have done此结构表示对过去情况的推测和判断。 The road is wet. It must have rained last night. 情态动词+ have been doing此结构表示对过去正在进行的情况的推测和判断。 Your mother must have been looking for you at that

8、 moment.,根据句意, 从方框中选择正确的情态动词填空, 每项限用一次。 should, must, cant, may not, mustnt 1. That _ be Lucy. She has gone to Beijing on business. 2. There _ be something wrong with my watch. It isnt working now.,cant,must,3. He _ know the answer, either. Lets ask that policeman. 4. You _ swim in the river. Its da

9、ngerous. 5. You _ look after your parents when they become older. Its your duty.,may not,mustnt,should,用must, might, could或cant 填空 The toy car _ be Jims. He is the only kid at the picnic. 2. This Mp5 _ be Lindas. I know she has one. 3. The mobile phone _ belong to Lucy or Lily. They both have mobile

10、 phones. 4. The man _ be Mr Smith. He has gone to Shanghai and hell be back in three days.,must,could / might,could / might,cant,4a Choose the best way to complete each sentence using the words in brackets. The keys:,might be,must be,could be,cant be,could be / must be,A: Many people are wearing coa

11、ts. B: The weather must be _. 2. A: Sally has been coughing a lot. B: She might be _. 3. A: This restaurant is always crowded. B: The food _. 4. A: Whenever I try to read this book, I feel sleepy. B: It cant _.,4b Complete these responses.,getting colder / cold outside,having a sore throat / ill,mus

12、t be delicious,be that boring,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

13、because the clothes look like boys clothes.,Look at the two rooms below. Make guesses about the owner of each room.,A：It could / might / cant be . because . B：I guess so / I dont think so. But it might / could / must be . because .,【浙江湖州】 Whos singing in the next room? It _ be her. She has gone to N

14、ew 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，用cant，意为“一定不”。must表示推测时，意为“一定”，用于肯定句；根据答语“她已经去了纽约”可知是否定推测，故选A。,中考链接,【2011湖北黄冈】41. 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

15、“它不可能是约翰的，对他来说太小了。”故排除C、D，too much为“太多”的意思，much too为“太”。故选A。,【2013天津】 Where are you going this month? We_ go to Xiamen, but were not sure. A. neednt B. must C. might D. mustnt 【解析】 neednt (不必)表建议； must (一定)表猜测的可能性很大； might (可能，也许)表不是很肯定的猜测。 mustnt(不允许)表命令。句意：-这个月你们将去哪？-我们或许去厦门，但还不确定。,C,【2013福建泉州】- H

16、ave 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：- 你已经决定到哪里过暑假了吗？- 还没有呢，我们也许去青岛，那是个度假的好地方。情态动词表示推测时，may表“可能”，must表“一定”，cant表“不可能”。,A,【2014铜仁】 Must I water the flowers now, mum? No, you _. You _ do it lat

17、er. A. mustnt; must B. mustnt; may C. neednt; may D. neednt; must 【2014连云港】 _ I know by what time you want the project to be done? By the day after tomorrow. _ you finish it on time? A. May; Can B. Must; Need C. Could; Must D. Need; Would,C,A,【2014长沙】Whos singing in the garden? It _ be Mr. Brown. He always practices singing at this time. A. must B. cant C. need 【2014河北】I _ follow you. Would you please repeat it? A. cant B. mustnt C. neednt D. shouldnt,A,A,【2015安徽