修改module4unit2情态动词语法.ppt

,We are what we eat. 吃什么是什么,(American author) : 1 I believe very strongly that our overproduction of cheap grain in general, and corn in particular, has a lot to do with the fact that three-fifths of Americans are now overweight. 2 The obesity crisis（危机） is complicated（复杂） in some ways, but its very simple in another way. 3 Basically, Americans are on average eating 200 more calories a day than they were in the 1970s.,4 If you do that and dont get correspondingly(相应） more exercise, youre going to get a lot fatter. 5 Many demographers(人口统计） are predicting that this is the first generation of Americans whose life span（寿命） may be shorter than their parents. 6 The reason for that is obesity, essentially（根本上）, and diabetes （糖尿病）specifically. （具体来说）,1 Choosing what to eat is no longer as easy as it once was 2 Our eating habits have changed, as has our way of life, and the fuel we need for our bodies is also different 3 Traditional diets often have too much fat and too many calories for the 21st-century person,4 If we want to keep up with the high pace of modern life, we had better learn to make the fight choices about what and how we eat 5 Stores offer all kinds of food and snacks and we have to make many choices,6When we choose what to buy and eat, we had better think whether the food will give us the nutrients we need 7Some nutrients help build our body and make it stronger. 8Protein, for example, is good for our musclesFish, meat and beans contain a lot of protein. Calcium(钙）, which is found in eggs，milk and other dairy products（奶制品)is good for our bones and teeth,9 We should also eat carbohydrates（碳水化 和物），the main fuel for our body which we can get from bread，rice and noodles. 10 Other nutrients，such as fibre and minerals，help keep our body Functioning(运行）well,1很重要的是养成健康的生活习惯。 2 为了保持健康，我们应该吃不同的健康饮食。 3 健康饮食一般包括适量的鱼、肉、蔬菜、还有主 食。 4 只有养成健康的饮食习惯才能建立健全的体魄。 5 他不容许女儿多吃垃圾食品。 6 要是王老师不像往常那样到学校上班，那准有什么事情发生了。,1It is important for us to form healthy eating habits. 2 To keep fit，we should eat/take/have various healthy diets. 3 Healthy diets generally include proper amounts of fish, meat, vegetables , fruits as well as main food. 4 Only by developing healthy eating habits can we build up a strong body. 5 He couldnt have his daughter eating too much junk food. 6 If Mr. Wang didnt come to school as he usually did, something must have happened to him.,【汉译英】 1不要让机器整天工作. 2他抢劫了银行并且偷携巨款潜逃了。 3. 最好的保健方式之一是形成健康的饮食习惯。 4. 我厌倦了吃这种食物。 5. 10分钟以前你就应该到这儿的。,【汉译英】 1. Dont have the machine working all day. 2. He robbed the bank and got away with a lot of money. 3. One of the best ways for people to keep fit is to develop healthy eating habits. 4. Im tired of having this kind of food. 5. You ought to have come here ten minutes ago.,【汉译英】-p50 1The weakness of this diet is that it has too much fat and sugar; its strength is that it has plenty of energy-giving food. 2 The shopkeeper is trying to win his customers back with a discount. 3 If you dont say sorry for your mistake, they wont get away with it. 4 He has been in debt for a long time. How to earn his living is a big problem.,【汉译英】-p50 5 When I was waiting for my friend, I suddenly spied a man not far away glaring at me. 6 I dont want to lie to you, but I have to say that his intelligence is limited. 7 Experts say eating carrots benefits your eyes. 8 I usually eat dumplings with a little vinegar, which I believe helps me digest of food.,I thought you were a new customer and now I find you only came to spy on me and my menu. only to do 常表示“出乎意料之外的结果” I got to the shop only to find that the door was closed. 比较： He came very early to the station finding no passengers on the platform.,look 外表视觉印象， appear 给人以表面的印象，appear的不确定性更大一些， seem 侧重指根据某种迹象作出内心的判断。 He looks like her father.(长相象） He seems to be her father. (主观判断） She appears wise. (外表给人印象） look 之后一般只限于 to be(且较少见)： He seems appears to have traveled a lot. 他似乎去过不少地方。 但是不说He looks to have traveled a lot.,look, seem 之后可接介词 like，但 appear 之后一般不能： He just looks like his brother. 他的模样就像他的哥哥。 He seems like a fool. 他看起来像个傻瓜 appear 和seem不用于进行时态 三者均可用于 it 开头的句子，且三者之后均可接以 as if 或 as though 引导的从句 appear 和 seem 之后还可接 that 引导的从句 为避免重复，appear和seem后接的 that 从句有时可用so, not 代之： “Is he reliable? ” “It seems appears so (not).”“他可靠吗?”“似乎是可靠的(不可靠)。”,情态动词,表示推测,不表示推测,can could may might shall should must will would ought to,have to dare (darent) need (neednt) used to,否定式,表示推测,不表示推测,cant couldnt May not might not Shant shouldnt Mustnt Wont wouldnt Oughtnt to,Dont have to dare (darent) need (neednt),注意对must问句的回答: -MustI finish the work today? -Yes, _. No, _. No, _.,you must,you neednt,you dont have to,构成的反意疑问句,1.We must work hard at maths,_ ? 2.You must realize that we cant allow such behavior, _ ? 3.They must go there at once, _ ? 4.The houses must be clean if there are guests, _ ？,neednt we,mustnt you,neednt they,neednt they,。必须mustnt/neednt,。有必要neednt,注意对may问句的回答: -May I park the car here? -Yes, _. No, _. No, _.,you can,you cant,you may not 少用,May 猜测、可能性（用于肯定句中）,1.The story may or may not be true. 2.Can that be true? May that be true? 3.He cant know the truth. He may not know the truth.,他不可能知道真相。 他可能不知道真相。,His restaurant ought to be full of people. ought to与should意思接近，大多数情况下二者可以互换，但是should谈的是自己的主观看法，ought to则更多反映客观情况，在谈到法律、义务和规定时使用.如： We shouldought to help each other and learn from each other in our work She is your mother, so you ought to support her We ought to go and see Mary tomorrow, but I dont think we will,1.-Is John coming by train? -He should, but he _ not. He likes driving his car. (2002高考题） A. must B. can C. need D. may 2.It has been announced that candidates(候选人) _ remain in their seats until all the papers have been collected. (2002上海高考题） A. can B.will C. may D. shall 3.-I heard they went skiing in the mountains last winter. (2002北京高考题） -It _ true because there was little snow there. A. may not be B. wont be C. couldnt be D. mustnt be,可兼做行为动词的情态动词：need 、 dare,情态动词 (+动词原形),行为动词,.,need,dare,1.无人称和数的变化;,2.尤其用于：,*否定句及疑问句中;,*在if/whether之后;,*或与hardly, never, no one, nobody连用;,3.常以neednt 和darent 的形式出现;,4.dare有其过去时dared.,多用于肯定句; (sb.) need to do dare to do (sth.) need to be done (sth.) need doing,注意对need问句的回答: -Need I finish the work today? -Yes, _. No, _. No, _.,you must,you neednt,you dont have to,neednt 对其它情态动词的回答: -Shall I tell John about it? -No, you _. -Must we do it now? -No, you _.,neednt (dont have to),neednt (dont have to),表示推测情态动词的重要用法.,1. You must be Mr Smith-I was told to expect you here. 2. He must have known what we wanted. 3. We may have read the same report. 4. He cant have slept through all that noise. 5. Theres someone outside-who can it be? 6. What can they be doing? 7. These pills might help to cure your disease. 8. You could be right, I suppose.,表示推测情态动词的重要用法.,肯定的推测 可能的推测 否定的推测 疑问的推测,must,对将来 对现在 对过去,情态动词,may, might,cant, couldnt,can, could,+ V. + V. + have done 常见must be + be doing,+ V. + V. + have done + be doing 可以用not表示“可能不”,+V. + V. + have done + be doing,+ V. + V. + have done + be doing,1. I dont know where she is, she _ be in Wuhan. 2. At this moment, our teacher _ our exam papers. 这时，我们老师想必在批改试卷。 3. The road is wet. It _ last night. (rain) 4. Your mother _ for you. 你妈妈一定一直在找你。,may,must be marking,must have rained,must have been looking,5. Philip _ seriously in the car accident. 菲利普可能在车祸中受了重伤. 6. -Linda has gone to work, but her bicycle is still here. -She _ (go) by bus. 7. Mike _ his car, for he came to work by bus this morning. 迈克一定还没有找回他的车，因为早上他是坐 公共汽车来上班的。,may (might) have been hurt,may (might) have gone,cant have found,高考考题: 1. I thought you _like something to read, so I have brought you some books. A. may B. might C. would D. must 2. Where is my pen? I _it. A. might lose B. would have lost C. should have lost D. must have lost 3. I didnt hear the phone. I _asleep A. must be B. must have been C. should be D. should have been,B,D,B,4. -There were already five people in the car, but they managed to take me as well. -It _a comfortable journey A. cant be B. shouldnt be C. mustnt have been D. couldnt have been 5. Its nearly seven oclock . Jack _be here at any moment. A. must B. need C. should D. could,D,D,请把下列词语组合成句:,1. _, ( play, interesting, must, be, new, the ) for the director is so famous. 2. See how happy he is today! _ _. ( failed, he, cant, in, the, have, exam ) 3. Peter isnt in the classroom. _ _. ( may, playing, he, with, be, his, basketball, friends ),The new play must be interesting,He cant have failed in the exam,He may be playing basketball with his friends,不同的“肯定”程度可按下列层次排列： He is at home. (事实) He must be at home.（非常肯定的推断） He could be at home.（很可能） He ought to be at home.（很可能） He may be at home.（仅仅可能而已） He might be at home.（或许, 非常不确定） He might not be at home.（也许不在家） He may not be at home. （比might可能） He couldnt be at home.（很可能不在家） He cant be at home.（一定不在家） He isnt at home.（事实）,在不表示推测的情态动词中, 我们要注意以下考点:,1. 表示能力、许可的情态动词的用法。 2. 表示否定的情态动词的用法。 3. shall 和 will 的多种意义的区别。 4. 情态动词短语的使用。 5. 虚拟语气中情态动词的使用。,表示能力: can, could, be able to *be able to 能用于各种时态。 can / could 只能表示现在或过去的能力。 *was / were able to : “设法做成某事” 相当于 managed to do sth. succeeded in doing sth.。,1. 表示能力、许可的情态动词的用法。,1. A computer _ think for itself; it must be told what to do. A. cant B. couldnt C. may not D. might not,2. The fire spread through the hotel very quickly but everyone _ get out. A. had to B. would C. could D. was able to,A,D,3. They will _ run this machine on their own in three months. A. can B. could C. may D. be able to 4. That big cinema _ seat 2,000 people. A. can B. should C. ought to D. is able to,D,A,表示许可: may / might, can / could * might, could 比较委婉, 一般多用于疑问句. * can, may 表达的语言比较随便. * 在以could, might 表示征询对方意见 或表示请求时，回答应相应使用can, may.,5. Could I borrow your dictionary? Yes, of course you _. A. might B. will C. can D. should 6. Might I watch TV after supper? Yes, you _. A. may B. must C. might D. can,C,A,2. 表示否定的情态动词的用法: 部分情态动词的否定式是情态动词中的考点 之一。,mustnt 不准, 禁止 neednt 没必要 ( = dont have to ) cant 不能; 不可能 may not 不可以; 可能不 shouldnt 不应该 ( = ought not to ),7. You _ return the book now. You can keep it till next week if you like. A. cant B. mustnt C. neednt D. may not 8. Johnny, you _ play with the knife, you _ hurt yourself. A. wont ; cant B. mustnt ; may C. shouldnt ; must D. cant ; shouldnt,C,B,9. -Will you stay for lunch? -Sorry, _. My brother is coming to see me. A. I mustnt B. I cant C. I neednt D. I wont 10. -May I pick a flower in the garden? - _. A. No, you neednt B. Not, please. C. No, you mustnt D. No, you wont,B,C,情态动词：shall, will 的多种意义:,shall / will+ 动词原形:,* shall 可表示必须、命令、 警告或征询意见.,* will 可表示意愿、常出现的动作、在疑问句 中表示请求和建议.,* 均可表示将来。 过去时为 should, would.,3.,11. He _ be punished if he disobeys. 如果他不服从, 就要受到惩罚. 12. We are not going to quarrel at all if you _ only let me speak. 只要你让我说话, 我们根本就不会吵架. 13. -Sir, _ he go or stay? -Let him go. A. will B. shall C. might D. could,shall,will,B,14. The door _ open. 这门经常打不开. 15. Ronald _ stay in his small garden for a long time every day in the past. A. could B. might C. should D. would 16. You _ have the book after I read it. 我看完以后一定把这本书给你.,wont,D,shall,4. 情态动词短语的使用:,would like to do would rather do would rather + 从句 wo