九年级英语课件Unit8GrammarFocus(1).ppt

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1、Section AGrammar FocusTranslate the phrases.outside the window have fun next-door neighbor at first run away feel uneasy have no idea have fun (in) doing sth. 在窗外在窗外玩得高兴玩得高兴隔壁邻居隔壁邻居最初；最初； 首先首先逃跑逃跑心神不安心神不安一点不知道；一点不知道； 没办法没办法 做某事很愉快做某事很愉快- Whose volleyball is this?- It must be Carlas. She loves volley

2、ball.- Whose 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

3、 Carols. 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.mustcantcould might100%probably true20%-80%possibly true0almost not true 表示推测的情态动词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，在英

4、语中，表示对某件事物的确定程度，即表示推测的时候，我们通常会用到以即表示推测的时候，我们通常会用到以下情态动词下情态动词: must, might, could, may, cant, couldnt。可能性：可能性： must can/could may/mightcan not (cant)could not (couldnt)may notmight not一、一、mustmust表示可能性最大的肯定推测，意思是表示可能性最大的肯定推测，意思是“一定、准是一定、准是”。只能用于肯定句。如果。只能用于肯定句。如果要表示要表示“一定不一定不”，应该用，应该用cant。如果询。如果询问可能性时

5、，应该用问可能性时，应该用can。He must know the answers. 他肯定知道答案。他肯定知道答案。He cant know the answers. 他肯定不知道答案他肯定不知道答案Can he know the answer? 他知道答案吗？他知道答案吗？二、二、can / couldcan表示推测表示推测“可能性可能性”时，一般用于否时，一般用于否定句或疑问句。定句或疑问句。can在疑问句中意思是在疑问句中意思是“会会，可能，可能”。He cant pick her schoolbag up. 他不可能拿了她的书包。他不可能拿了她的书包。 could 表示某事有可能发生

6、或可能是事实。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。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。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、委婉的请还可用于表示客气、礼貌、委婉的请求语气。求语气。Could you please help me with my homework? 你能帮我完成我的家庭作业吗？你能帮我完成我的家庭作业吗？ 三、三、may / mightmay, might表示推测表示推测“可

7、能性可能性”时，意思时，意思是是“可能可能”，“也许也许”。might不表示过去不表示过去时态，语气更委婉，可能性更小。时态，语气更委婉，可能性更小。may, might表推测时，可用于否定句，但不用于表推测时，可用于否定句，但不用于疑问句。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。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表示推测可以分为以下几种情况: 情态动词情态动词+ do 此结构表示对现在或将来情况的推测和判断此结构表示对现在或将来情况的推测和判断 Do you

8、 know where she is now? I think she might travel in Beijing. 情态动词情态动词+ be doing 此结构表示对现在或将来正在进行的情况的此结构表示对现在或将来正在进行的情况的推测和判断。推测和判断。 At this moment, my father cant be working in the office. 情态动词情态动词+ have done 此结构表示对过去情况的推测和判断。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. 情态动词情态动词

9、+ have been doing 此结构表示对过去正在进行的情况的推测此结构表示对过去正在进行的情况的推测和判断。和判断。 Your mother must have been looking for you at that moment.根据句意根据句意, 从方框中选择正确的情态动词从方框中选择正确的情态动词填空填空, 每项限用一次。每项限用一次。 should, must, cant, may not, mustnt1. That _ be Lucy. She has gone to Beijing on business.2. There _ be something wrong wi

10、th my watch. It isnt working now.cantmust3. He _ know the answer, either. Lets ask that policeman. 4. You _ swim in the river. Its dangerous. 5. You _ look after your parents when they become older. Its your duty. may notmustntshould用用must, might, could或或cant 填空填空1.The toy car _ be Jims. He is the o

11、nly 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 phones. 4. The man _ be Mr Smith. He has gone to Shanghai and hell be back in three days. mustcould / mightcould / mightcant4a4a Choose the best way to complete each

12、 sentence using the words in brackets. The keys:The keys:might bemust becould becant becould be / must be1. 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 crowded. B: The food _.4. A: Whenever I try to

13、 read this book, I feel sleepy. B: It cant _.4b4b Complete these responses.getting colder / cold outsidehaving a sore throat / illmust be deliciousbe that boring4c 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 hobb

14、ies? 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.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 /

15、 I dont think so. But it might / could / must be . because .【浙江湖州浙江湖州】 Whos singing in the next room? It _ be her. She has gone to New York. A. cant B. must C. shouldnt D. can【解析解析】考查情态动词表推测。表示否定推测考查情态动词表推测。表示否定推测时，用时，用cant，意为，意为“一定不一定不”。must表示表示推测时，意为推测时，意为“一定一定”，用于肯定句；根，用于肯定句；根据答语据答语“她已经去了纽约她已经去了纽

16、约”可知是否定推测，可知是否定推测，故选故选A。【2011湖北黄冈湖北黄冈】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【解析解析】情态动词的用法。根据句意情态动词的用法。根据句意“它不可它不可能是约翰的，对他来说太小了。能是约翰的，对他来说太小了。”故排除故排除C、D，too much为为“太多太多”的意思，的意思，much too为为“太太”。故选。故选A。【2

17、013天津天津】 Where are you going this month? We_ go to Xiamen, but were not sure. A. neednt B. must C. might D. mustnt【解析解析】 neednt (不必不必)表建议；表建议； must (一一定定)表猜测的可能性很大；表猜测的可能性很大； might (可能，也可能，也许许)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【2013福建泉州

18、福建泉州】- 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【解析解析】句意：句意：- 你已经决定到哪里过暑假你已经决定到哪里过暑假了吗？了吗？- 还没有呢，我们也许去青岛，那是还没有呢，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，个度假的好地方。情态动词表示推测时，may表表“可能可能”，must表表“一定一定”，cant表表“不可能不可能”。 A【20

19、14铜仁铜仁】 Must I water the flowers now, mum?No, you _. You _ do it later. A. mustnt; must B. mustnt; may C. neednt; may D. neednt; must【2014连云港连云港】 _ 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

20、; Would C A【2014长沙长沙】Whos singing in the garden?It _ be Mr. Brown. He always practices singing at this time. A. must B. cant C. need【2014河北河北】I _ follow you. Would you please repeat it? A. cant B. mustnt C. neednt D. shouldnt A A【2015安徽安徽】 - Do you have any plans for this Sunday? - Im not sure. I _ go to the countryside to see my grandmother. A. can B. must C. may D. need 【2015江苏盐城市江苏盐城市】 - Do you have any plans for this summer vacation? - Im not sure. I _ take a trip to Taiwan. A. must B. need C. may D. should C C