201x年九年级英语下册Module5RulesandsuggestionsGrammar情态动词外研版.ppt

外研小学起点外研小学起点外研小学起点外研小学起点九年九年九年九年级级级级( (下下下下) )Module 5Module 5整理课件有一定的有一定的词义词义，但，但词词意不完整意不完整, ,不能不能单单独作独作谓语谓语，必，必须须和和实义实义动词连动词连用用, ,表示表示说话说话人人对对某一某一动动作或状作或状态态的的态态度和看法情度和看法情态态动词动词后面跟后面跟动词动词原形，没有人原形，没有人称和数的称和数的变变化整理课件1. can, could 1)表示能力表示能力(体力体力, 知知识识, 技能技能) , 常用情常用情2) 态动词态动词can和和could表达Can you lift this heavy box? (体力体力) Mary can speak three languages. (知知识识)Can you skate? (技能技能) 此此时时可用可用be able to代替can只有一般只有一般现现在在时时和一般和一般过过去去时时；而；而be able to则则有更多的有更多的时态时态 整理课件例如：例如：I’ll not be able to come this afternoon. (一般将来一般将来时时) 当表示当表示“经过经过努力才得以做成功某事努力才得以做成功某事”时时应应用用be able to, 不能用不能用can。

如：如：He was able to go to the party yesterday evening in spite of the heavy rain. 整理课件2) 表示表示请请求和允求和允许许 ---Can I go now? ---Yes, you can. / No, you can’t. 此此时时可与可与may互互换换在疑问问句中句中还还可用可用could, might代替，但代替，但could, might 并不表并不表示示过过去式，只是去式，只是语语气更委婉它气更委婉它们们不能用不能用于肯定句和答于肯定句和答语语中 --- Could I come to see you tomorrow? --- Yes, you can. (No, I’m afraid not.) 整理课件3) 表示客表示客观观可能性可能性 (客客观观原因形成的能力原因形成的能力) They’ve changed the timetable, so we can go by bus instead. This hall can hold 500 people at least. 整理课件4) 表示推表示推测测 (惊惊讶讶、、怀怀疑、不相信的疑、不相信的态态 度度) ，用于疑，用于疑问问句、否定句和感句、否定句和感叹叹句句 中。

中 Can this be true? This can’t be done by him. How can this be true? 整理课件2. may, might 1) 表示表示请请求和允求和允许许might比比 may语语 气更委婉，而不是气更委婉，而不是过过去式否定回答去式否定回答时时可用可用can’t 或或mustn’t，表示，表示“不可不可以，禁止以，禁止” 例如：例如： ---- Might/ May I smoke in this room? ---- No, you mustn’t. 整理课件 ---- May/Might I take this book out of the room? ---- Yes, you can. (No, you can’t / mustn’t. ) 用用May I...？征徇？征徇对对方方许许可可时时比比较较正式正式和客气，而用和客气，而用Can I...？在口？在口语语中更常中更常见见2) 用于祈使句，表示祝愿用于祈使句，表示祝愿。

例如：例如： May you succeed! 整理课件3) 表示推表示推测测、可能性、可能性 (不用于疑不用于疑问问 句句)might不是不是过过去式，它所表示去式，它所表示 的可能性比的可能性比may小 例如：例如： He may /might be very busy now. Your mother may /might not know the truth. 整理课件3. must, have to 1) 表示必表示必须须、必要例如：例如： You must come in time. 在回答引出的在回答引出的问问句句时时, 如果是否定的如果是否定的, 不不能用能用mustn’t (禁止禁止, 不准不准)，而用，而用needn’t, don’t have to (不必不必) ---- Must we hand in our exercise books today? ---- Yes, you must. ---- No, you don’t have to/you needn’t. 整理课件2) must是是说话说话人的主人的主观观看法，而看法，而have to 则则强强调调客客观观需要。

需要must只有一般只有一般现现在在 时时，，have to 有更多的有更多的时态时态形式 例如：例如： His play isn’t interesting, I really must go now. I had to work when I was your age. 整理课件 3) 表示推表示推测测、可能性、可能性 (只用于肯定的只用于肯定的陈陈 述句述句) 例如：例如： You’re Tom’s good friend, so you must know what he likes best. Your mother must be waiting for you now. 整理课件用用must, have to填空1. I know I ______ study hard.2. My mother is ill. I _______ look after her at home.musthave to整理课件1) Please ask that man. He ____ know that.2) The light is on, so he ______ be at home.3) It ______ be Wei Fang. She is at school now.4) —Are you coming to Jeff’s party? —I’m not sure. I ______ go to the concert instead. maymustcan’tmightcan, may/ might, must 表推表推测测整理课件4. shall和和should征求征求对对方意方意见见 Shall we go out for a walk? What shall we drink?1) shall2) should We should protect our environment. You should do it better next time.劝劝告告﹑义务义务﹑责责任任整理课件 用用shall/should填空。

填空 1.When _____ we meet? 2.You ______ see a doctor.shallshould整理课件5. will, would 1) 表示表示请请求、建求、建议议等，等，would更委婉更委婉 例如例如: Will / Would you pass me the ball, please? 2) 表示意志、愿望和决心表示意志、愿望和决心 例如例如: I will never do that again. They asked him if he would go abroad.整理课件3) would表示表示过过去反复去反复发发生的生的动动作或某种作或某种 倾倾向would表示表示过过去去习惯时习惯时比比used to正正式，且没有式，且没有“现现已无此已无此习惯习惯”的含的含义义 During the vacation, he would visit me every other day. The wound would not heal. 4) 表示估表示估计计和猜想和猜想 It would be about ten o’clock when she left home. 整理课件1) should, ought to表示表示“应该应该”，，ought to 2) 表示表示义务义务或或责责任，比任，比should语语气重。

气重3) I should help her because she is in trouble. You ought to take care of the baby. 6. should, ought to 整理课件2) 表示表示劝劝告、建告、建议议和命令should, ought to可通用，但在疑可通用，但在疑问问句中常用句中常用should You should/ought to go to class right away. Should I open the window? 整理课件3) 表示推表示推测测 should, ought to (客客观观), must(主主观观) He must be home by now. (断定他已到家断定他已到家) He ought to/should be home by now. (不太肯定不太肯定) This is where the oil must be. (直爽直爽) This is where the oil ought to/should be. (含蓄含蓄)整理课件 情情态动词练习态动词练习1. 你必你必须马须马上回家。

上回家 2. 他一定吃他一定吃过过什么什么东东西了 3. 吃吃饭饭之前不能吃零食之前不能吃零食You must go home now.He must have eaten something.You mustn’t eat snacks before meals.整理课件4. 我可以我可以问问你的名字你的名字吗吗？？ 5. 你能用英你能用英语说吗语说吗？？6. 我我们应该们应该准准时时去上学7. 你没有必要那么做你没有必要那么做May I ask your name?Can you speak in English?We should go to school on time.You needn’t do that.整理课件1. ---Dad, must I finish my homework today？？ ---No, you ____. You may finish it tomorrow. (2008朝阳朝阳) A. needn’t B. mustn’t C. don’t D. won’t2. ---May I put my bike here? (2008广安广安) ---No, you ___. You should put it over there. A. may not B. mustn’t C. needn’t整理课件解答解答锦锦囊囊掌握情掌握情态动词问态动词问句的回答：句的回答：May I…? Yes, …may. No,…mustn’t/can’t. Must I…? Yes, …must. No,…needn’t/don’t have to. 整理课件1. ---Is Mr. Brown driving here?(2008安徽安徽) ---I’m not sure. He ____ come by train. A. may B. can C. need D. must2. ---Who’s that boy reading in the garden? Is it David? (2008重重庆庆) ---It ______be David. I saw him in the classroom just now. A. must B. can’t C. may D. needn’t整理课件3. I’m sure this book ____ Li Lei’s, because there is his name on it. (2008吉林吉林) A. can’t be B. may be C. might be D. must be解答解答锦锦囊囊掌握推掌握推测测用法用法:肯定可能性由肯定可能性由must → may → might逐步逐步递递减减 ; can’t则则用于用于否定否定句、句、疑疑问问句。

句整理课件1. ---Lisa, ___ you speak French?(2008南京南京) ---Yes, but only a little. A. may B. can C. need D. must2. ---___ I use your mobile phone?(2008北京北京) ---Certainly. Here you are. A. May B. Must C. should D. need整理课件3. --- Mum, can I go to the movies today? (2008长长沙沙) --- No, but you ____ finish your schoolwork first. A. can B. can’t C. must D. needn’t解答解答锦锦囊囊掌握基本用法掌握基本用法: can表能力表能力, may表表许许可可, must表表义务义务整理课件1. ---Is Lucy knocking at the door?(2008长长沙沙) ---No. It ____be Lucy. She is in Japan. A. needn’t B. must C. can’t2. ---Have you seen my glasses? I ___find them. ---Sorry, I haven’t seen them.(2008武武汉汉) A. can’t B. shouldn’t C. won’t D. mustn’t整理课件3. When traffic lights are red, we ___ stop and wait. (2007南京南京) A. may B. can C. must D. might4.---Must I wait for here now?(2006沈阳沈阳) ---No, you____. You may give it to me tomorrow. A. don’t have to B. mustn’t C. can’t D. shouldn’t整理课件请请用适当的情用适当的情态动词态动词填空填空, 每空一每空一词词(含含缩缩写写)。

1. —Where is your mother, Tony? —She ____ be in the kitchen. I am not sure.2. John, you _______ play with the knife, or you _________ hurt yourself. maymustn’tmay/might整理课件3. You _____ stop your car when the traffic light is red.4. He says that he ___ speak at least two foreign languages.5. I will do whatever I ___ do to help you.6. —Let’s go for a picnic this afternoon. —Sorry, I _____. I have to go to see my grandparents with my father.can’tmustcancan整理课件。