高中情态动词大全PPT学习教案

1、会计学1高中情态动词大全高中情态动词大全情态动词情态动词表示推测表示推测不表示推测不表示推测can couldmay mightshall shouldmust will wouldought tohave to dare (darent)need (neednt) used to第1页/共36页情态动词有一定的意义，但没有人称和数的情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成变化，不能独立使用，它和后面的动词构成谓语谓语只作情态动词的只作情态动词的can/could, may/might, ought to， must可情态可实义的可情态可实义的need, d

2、are/dared可情态可助动词的可情态可助动词的shall/should, will/would相当于情态动词的相当于情态动词的have to, used to第2页/共36页must , can/could, may/might 的用法的用法must1.must 表示推测时，表示推测时， 只能用于只能用于肯定句。肯定句。e.g.这个电脑肯定出了问题。这个电脑肯定出了问题。There must be something wrong with the computer. 你努力学了一整天，你努力学了一整天， 一定累了吧一定累了吧You have worked hard all day. You

3、 must be tired.第3页/共36页2.must +be doing/do 表示对表示对现在的动作现在的动作进行进行肯定推测肯定推测 e.g.他现在一定在看小说他现在一定在看小说. .He must be reading novels now. 他们买了一辆新车他们买了一辆新车。 他们一定很有钱他们一定很有钱.They have bought a new car. They must have a lot of money.第4页/共36页3.must +have done 表示对表示对过去发生的事情过去发生的事情作作出的肯定判断出的肯定判断e.g.e.g.他们在玩篮球，他们在玩篮球

4、， 他们一定完成了作业他们一定完成了作业。They are playing basketball, they must have finished their homework. 路是湿的。昨天晚上一定下雨了。路是湿的。昨天晚上一定下雨了。The road is wet. It must have rained last night.第5页/共36页对现在或将来情况推测：对现在或将来情况推测：must +动词原形。动词原形。must只能用于肯定。否定和疑问分别用只能用于肯定。否定和疑问分别用cant和和can。e.g. He must tell a lie. Can he tell a lie

5、 ? He cant tell a lie.*must-should/ought to may-might/could+do可能性依次减弱可能性依次减弱第6页/共36页He must be reading, isnt he?You must do it yourself, dont you?He must have gone over the article, hasnt he?It must have rained last night, didnt it?表猜测语气的反意疑问句的构成表猜测语气的反意疑问句的构成第7页/共36页can/could 1. can /could 表示推测时，只能

6、用在表示推测时，只能用在否定句否定句或疑问句中或疑问句中。e.g. Its so late. Can Tom be reading? Can it be Mr. Green? 这个人不可能是玛丽，这个人不可能是玛丽， 她生病了。她生病了。It cant be Mary. She has fallen ill. 她不可能在说谎。她不可能在说谎。She couldnt be telling lies.第8页/共36页2. can/could have done 对对过去发生过去发生行为的可行为的可能性进行推测能性进行推测: :刚才我还看见他了，刚才我还看见他了， 所以他不可能出国的所以他不可能出国

7、的。 I saw him just now so he couldnt have gone abroad. 门是锁着的，门是锁着的， 所以她不可能在家。所以她不可能在家。The door was locked. She couldnt have been at home.第9页/共36页3. can/could have done “本可以，本来可能本可以，本来可能已经已经”用于用于肯定句肯定句中，表示对中，表示对过去发生的事过去发生的事情情做出的判断做出的判断. . e.g.你本来可以考的更好。你本来可以考的更好。You could have had a better mark.第10页/共

8、36页may/might1.may/might表示推测时，只能用于陈述句，表示推测时，只能用于陈述句，表示对现在或将来要发生的动作把握不大。表示对现在或将来要发生的动作把握不大。e.g.她们明天可能会到这里来。她们明天可能会到这里来。They may come here tomorrow. 他们可能还在等我们呢。他们可能还在等我们呢。They may be still waiting for us.第11页/共36页3.might/may have done,表示对表示对过去发生的动过去发生的动作作进行可能性推测。进行可能性推测。 e.g.他可能去医务室了。他可能去医务室了。He may ha

9、ve gone to the clinic. 他可能已经从报纸上知道这个消息了。他可能已经从报纸上知道这个消息了。He might have read about the news in the newspaper.第12页/共36页策划：学生双语报142. should 的用法的用法第13页/共36页表示推测表示推测情态动词的重要用法情态动词的重要用法. .肯定的推测肯定的推测可能的推测可能的推测否定的推测否定的推测疑问的推测疑问的推测must 对将来对将来 对现在对现在 对过去对过去情态动词情态动词may, might cant, couldntcan, could + V. + V. +

10、 have done常见常见must be + be doing + V. + V. + have done + be doing 可以用可以用not表示表示“可能不可能不” +V. + V. + have done + be doing+ V. + V. + have done + be doing第14页/共36页策划：学生双语报161.Judging from his accident, he must be from the south,2.Tom bought a lot of apples. He must like eating apples,3.It is eleven ocl

11、ock at night and the lights are off. They must be sleeping now,isnt, he? didnt he?arent they?因因must后是实意动词后是实意动词like因因must后是系动词后是系动词 be must后接的是后接的是be sleeping，是对正在进行的情况推测，是对正在进行的情况推测第15页/共36页策划：学生双语报171.We must have learned 2,000 words by the end of last term,hadnt we?3.He must have gone to Beijing,

12、didnt it?hasnt he? 若句中含有过去完成时的时间状语，用过去完成时完成反意疑问句若句中含有过去完成时的时间状语，用过去完成时完成反意疑问句若句中含有过去的时间状语，用一般过去时完成反意疑问句若句中含有过去的时间状语，用一般过去时完成反意疑问句若句中不含任何时间状语，若句中不含任何时间状语， 用现在完成时完成反意疑问句用现在完成时完成反意疑问句2.It must have rained last night, for the road was very muddy，第16页/共36页 1. I dont know where she is, she _ be in Wuhan.

13、2. At this moment, our teacher _ our exam papers. 这时，我们老师想必在批改试卷。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。你妈妈一定一直在找你。 maymust be markingmust have rainedmust have been looking第17页/共36页5. Philip _ seriously in the car accident. 菲利普可能在车祸中受了重伤菲利普可能在

14、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。公共汽车来上班的。may (might) have been hurtmay (might) have gonecant have found第18页/共36页Practice 2:表示推测表示推测情态动词的重要

15、用法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.

16、You could be right, I suppose.第19页/共36页1.-Is John coming by train? -He should, but he _ not. He likes driving his car. (2002高考题）高考题） A. must B. can C. need D. may2.It has been announced that candidates(候选人候选人) _ remain in their seats until all the papers have been collected. (2002上海上海高考题）高考题） A. can

17、 B.will C. may D. shall3.-I heard they went skiing in the mountains last winter. (2002北京北京高考题）高考题） -It _ true because there was little snow there. A. may not be B. wont be C. couldnt be D. mustnt be第20页/共36页modal verbGrammar ( 33ms )第21页/共36页策划：学生双语报23第22页/共36页策划：学生双语报24第23页/共36页策划：学生双语报25第24页/共36页策

18、划：学生双语报26第25页/共36页策划：学生双语报27BBA第26页/共36页策划：学生双语报284.As it turned out to be a small house party, we _ so formally.A. neednt dress B. didnt have to dress upC. Might not have dressed up D. neednt have dressed up5.Im rather surprised you havent reported him to your teacher. In my opinion, you _ this as

19、soon as you found out he was cheating.A. must have done B. might have done C. should have done D. could have done DC第27页/共36页策划：学生双语报292. should 的用法的用法注意：注意：should可表示可表示“居然，竟然居然，竟然”。e.g.我不敢相信这样一个绅士居然对老人如我不敢相信这样一个绅士居然对老人如此无礼。此无礼。 I cant believe such a gentleman should be so rude to the old.第28页/共36页策

20、划：学生双语报30e.g. Young people should learn how to use computers. Every citizen ought to obey law. You ought not to go.3. should常表示劝告、建议、命令，与常表示劝告、建议、命令，与ought to意义相近，但意义相近，但ought to多表示责任多表示责任、义务，语气强烈。在疑问句中通常用、义务，语气强烈。在疑问句中通常用should代替代替ought to。第29页/共36页策划：学生双语报31e.g. You should/ought to have told her t

21、he truth earlier. She shouldnt have left without saying a word.4.should/ought to have done表示责备或表示责备或批评批评,意为意为“本应该做到本应该做到但没有做到但没有做到”,用于否定则表示用于否定则表示“本不该本不该但但”ought to的语气更强烈的语气更强烈.第30页/共36页策划：学生双语报32can, could 和和be able to的用法的用法e.g.She can/be able to sing the song in English. This machine can make you feel comfortable.1.can, be able to都可都可表示表示“能力能力”Can的主语是人或物的主语是人或物,be able to的主语是人的主语是人 第31页/共36页策划：学生双语报33can, could 和和be able to的用法的用法e.g. Well be able to finish the work soon. I havent been a