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1、Unit 3It must belong to Carla.,Section APeriod Three,laboratoryoutdoorscoatsleepy,n. 实验室adv. 在户外；在野外n. 外套；上衣adj. 困倦的；瞌睡的,动词的种类,按词义和句中的作用，动词可以分为四类。 实义动词（及物动词和不及物动词） 系动词 助动词 情态动词,That man _ be my English teacher. He has gone to Canada. (2011湖南株洲)A. neednt B. mustnt C. cant【考点点拨】 考查情态动词辨析。neednt意为“不必”；
2、mustnt表示“明令禁止”；cant表示“不可能”。根据句意“那个男人不可能是我的英语老师。他去了加拿大。”故选C。,考点例析,情态动词,情态动词具有一定的意义，但不能单独作谓语，其后需接动词原形一起构成句子的谓语。情态动词(除have to以外)没有人称和数的变化。另外，情态动词可用来构成否定句、疑问句并进行简略回答。初中常见的情态动词有：can, may, must, need, have to, could, should, ought to 等。,考点一：考查表示“能力”的情态动词,1. _ your Australian friend eat with chopsticks? Ye
3、s, but she cant use them well. A. Should B. Need C. Can D. Must2. The work is too hard for us. We _ finish it on time. A. cant B. mustnt C. shouldnt D. neednt,情态动词考点,3. Could your father play golf when he was young? No, he _. But he _ play table tennis. A. couldnt; could B. neednt; might C. mustnt;
4、should D. shouldnt; need,【考点点拨】 情态动词can表示“能力”时，与be able to同义，其否定形式为cant。can表示现在的能力，其过去式could表示过去的能力。,考点二：考查表示“应该”的情态动词,1. _ weto finish our homework before noon? Yes, you _. A. Need; can B. Have; do C. Ought; ought to D. Should; must2. You _ study hard if you want to be a scientist in the future. A.
5、 may B. should C. would D. could,【考点点拨】 情态动词should和ought to都可表示“应该”，但should侧重说话者主观的看法，而ought to更侧重客观情况。 should的否定形式为shouldnt，ought to的否定形式为oughtnt to或ought not to。,考点三：考查表示“请求；许可”的情态动词及其回答,1. _ I borrow your maths book? Sure. Here you are. A. Need B. Will C. May D. Must,2. _ I take some photos in th
6、e hall? No, you _. Look at the sign “No photos”! A. Can; neednt B. Must; mustnt C. Should; neednt D. May; mustnt 3. Could I use your dictionary for a while? Yes, of course you _. A. could B. can C. will D. should,【考点点拨】 情态动词may和can都可表示“请求；许可”。may比can正式，could在表示“请求；许可” 时，既可表示过去，也可表示语气的委婉。 当“May / Can
7、 / Could I ”表示“请求；许可”时，肯定回答常用“Yes, please.” / “Certainly.”等，否定回答常用“No, you cant / mustnt.”等。,考点四：考查表示“推测”的情态动词,1. I saw Lily in the supermarket this morning. Oh, it _ her. She moved to Australia the day before yesterday. A. can be B. must be C. cant be D. mustnt be,2. After a long walk, the children
8、 _ be very tired now. A. will B. must C. have to D. can3. John _ go with us tomorrow, but he isnt sure. A. must B. can C. need D. may,【考点点拨】 may, can, must都可表“推测”，三者的可能性依次递增。 may和must表“推测”常用于肯定句中，can表“推测”常用于否定句和疑问句中。,考点五：考查need, must和have to的用法,1. Jim, you _ play with the knife. You _ hurt yourself.
9、 A. wont; cant B. mustnt; may C. shouldnt; must D. cant; shouldnt 2. _ I have to hand in my homework now, Mr Zhang? Yes, you do. A. Do B. Can C. May D. Must,3. Must I get up before six oclock tomorrow morning, Dad? No, you _. Tomorrow is Saturday. You may get up a little later. A. mustnt B. cant C.
10、neednt D. may not4. Its too late. We _ go home, or well be blamed (责备). A. can B. may C. might D. have to,【考点点拨】 need作情态动词，意为“需要”，后接动词原形，常用于否定句、疑问句和条件句中。 must意为“必须”，强调主观看法。对must引导的一般疑问句，肯定回答常用“must”，否定回答常用neednt或dont have to。mustnt意为“一定不要；禁止”。 have to意为“ 不得不；必须”，强调客观情况下需要做某事，有人称、数和时态的变化，变否定句和疑问句时需要借
11、助助动词完成句型的变化。,Finish the exercises 4a-4c on page 20.,Find the answer to the question.,Individual activity,注: 另附 word 文档。点击此处链接,1. The room is big enough. It _ hold 100 people. (2011广西南宁) A. can B. must be C. need D. have to2. Mr. Wang, can I finish my homework tomorrow? Sorry, you _. (2011重庆) A. cant
12、 B. dont C. neednt D. wont,I. 中考链接。,3. Whose T-shirt is this? It _ be Johns. Its much too small for him. (2011湖北荆州) A. may B. must C. cant D. shouldnt4. The talented boy _ write lyrics when he was at the age of ten. (2011山西) A. may B. could C. must,5. Bob, shall we go and meet our new classmate? Sor
13、ry. Im busy now. But you _ ask David to go with you. He is free. (2011浙江丽水) A. need B. may C. would D. must6. _ I borrow your history book? Sure. Here you are. (2011江苏淮安) A. Must B. May C. Need D. Will,7. Cars, buses and bikes _ stop when the traffic lights change to red. (2011上海) A. can B. may C. m
14、ust D. need8. The magazine _ be Lilys, for we can find her name on the cover. (2011山东青岛) A. may B. might C. could D. must,9. Must I get up early tomorrow morning? No, _. (2011山东滨州) A. you mustnt B. I dont think you have to C. you cant D. you need10. Look at the sign! Oh, I see. We _ waste water. (2011广西南宁) A. can B. must C. mustnt D. neednt,Review passive voice we have learnt today.Preview the new words we will use in the next lesson.,Homework,