情态动词讲解

1、关于情态动词讲解第一张，PPT共四十五页，创作于2022年6月1.表能力.could 是can的过去式, 表示过去 2. 表示“请求” “许可”(表请求时，口语中常用could 代替 can 使语气更委婉，回答时用can)can 与could1) Some of us can use the computer now, but we couldnt last year.2) The newly-built theatre can seat 1500 people.1) -Can/Could I use your dictionary? -Yes, you can.2) You can have

2、 my seat. Im going now. 3) You can not talk in class. flash第二张，PPT共四十五页，创作于2022年6月3. 表示推测，意为“可能”“或许”，常用于疑问句或否定句 (could 可以用于肯定句中)1) It cant be my father. He is now in England.2) -Can it rain tomorrow? -No, it cant. 3) Where can I put my key ?4) You could be right，but I dont think you are. 对过去的可能推测怎么说

3、？(不可能)5) He cant/couldnt have gone to Beijing, for I saw him just now.第三张，PPT共四十五页，创作于2022年6月can和be able to的用法区别She _sing the song in English.This machine _ make you feel comfortable.1. can的主语是人或物,be able to的主语是人 We_ finish the work soon.I _ see the film so far. 2. can只用于现在式和过去式(could)。be able to 可以

4、用 于各种时态。She ran fast so that she _ catch the bus.3. 表示成功地做了某事时，只能was/wereableto，不能用could。 He_ fleeEuropebeforethewarbrokeout. can/is able to can ll be able to havent been able tocould/was able towasableto第四张，PPT共四十五页，创作于2022年6月may 与might表示“许可”或“请求”，有“可以”的意思，比can正式。 口语中常用 might 代 may ,表示委婉语气。 否定回答时常用

5、“must not”表“禁止，阻止”。1) - May/Might I watch TV after supper? - Yes, you may. /Yes, please. (No, you mustnt.)2. 表示可能性。 意为“或许，可能” 常用于肯定句或否定句中。might 比 may 可能性小。1) They may/might be in the library now.2) She may not know the truth. (或许不，可能不)3) She may/might have gone home. 第五张，PPT共四十五页，创作于2022年6月3. may/ m

6、ight well + 动词原形 “完全可以，很有可能” You may/might as well go and have a look.5. May you +动词原形 表“希望、祝愿” May you succeed.4. may/ might as well + 动词原形 “还是的好” You may well be proud of your son. He is excellent.May you have a good journey!May all your dreams come true！第六张，PPT共四十五页，创作于2022年6月1. A computer _ thin

7、k for itself; it must be told what to do. A. cant B. couldnt C. may not D. might not2. The fire spread through the hotel very quickly but everyone _ get out. A. had to B. would C. could D. was able toA D 第七张，PPT共四十五页，创作于2022年6月3. They will _ run this machine on theirown in three months.A. can B. cou

8、ld C. may D. be able to4. That big cinema _ seat 2,000 people.A. can B. should C. ought to D. is able toD A 第八张，PPT共四十五页，创作于2022年6月5. Could I borrow your dictionary? Yes, of course you _. A. might B. will C. can D. should6. Might I watch TV after supper? Yes, you _. A. may B. must C. might D. couldC

9、 A 第九张，PPT共四十五页，创作于2022年6月7.Peter _ come with us tonight, but he isnt very sure yet. A. must B. may C. can D. will8. Some people who dont like to talk much are not necessarily shy；they just be quiet people.A. must B. mayC. should D. would 9.Liza _ well not want to go on the trip - she hates travelin

10、g.（2008全国II）A. will B. can C. must D. may BBD第十张，PPT共四十五页，创作于2022年6月may, might, can, could1. They (can not/may not) _ still be out, for the light is on in the house.2. You (cant/arent able to) _ smoke on the bus.3. With luck, tomorrow (can/could) _be a cooler day.4. You (can/might) _ be right, but I

11、m going back to check it.表示许可cantcould表示猜测can not表示猜测(不可能)might表示猜测第十一张，PPT共四十五页，创作于2022年6月will 与would 2. 疑问句中用于第二人称，表“请求、建议”等 would 比用will 委婉，客气些。1) Will/Would you (please) lend me your book?2) Would you like a cup of tea?3. will 与would用于表示主语的意志或意愿。 will 指现在，而 would 指 过去。1) Ill never do that again.

12、2) They said that they would help us.1. 作助动词表单纯的将来, 可用于各种人称。1) I will tell you something important tomorrow.2) He said that he would tell you something important the next day.第十二张，PPT共四十五页，创作于2022年6月5. 表示习惯性动作。 译作 “总是、惯于” will 指现在，would 指过去。1) This old man is strange. He will sit for hours without s

13、aying anything.2) She would sit by window, deep in thought.4. 表示推测，译作“会，将会” Give him the apple. He will like it.6. 与not搭配，表拒绝，无可奈何之意1) This door wont open.2)We pushed the car but it wouldnt move,not a bit. 第十三张，PPT共四十五页，创作于2022年6月1) Perhaps I shall pay a visit to England this winter. shall 1. 作助动词表单

14、纯的将来, 用于第一人称。2. 在疑问句中，用于提出建议、征求意见。 常用于一、三人称.1) Shall we begin our discussion?2) Shall he use your pen?flash第十四张，PPT共四十五页，创作于2022年6月3. 用于二、三人称，表说话人的允诺，决心，警告，命令,或威胁。1) You shall fail if you dont work harder. 2) You shall get what you deserve. 3) He shall be punished if he breaks the rule.4) Nothing sh

15、all stop us.（警告）(允诺)(威胁)(决心)4. 用在条约、规章、法令等文件中表示义务或规定。1) Nobody shall go out without the teachers permission. 2) Candidates shall remain in their seats until all the papers have been collected. 第十五张，PPT共四十五页，创作于2022年6月should用于表义务、劝告、建议。 意为”应该、应当”。 （也可用ought to， 但ought to 语气重）1) You should/ought to he

16、lp your mother with the housework. 2. 表示可能性、推测、推论或期待, 意为 “可能、按理说、该”Its 8 oclock now, he should be here at any moment.2) Dinner should be ready by now. 2) One ought not (oughtnt) to cross the street against the red light.3) Ought we to do it at once? Yes, you ought to.第十六张，PPT共四十五页，创作于2022年6月3. 表示意外或

17、惊讶。意为“竟然会”1) Its strange that he should be absent. 2) It seemed unbelievable that he should have done such a wicked thing.4. 表示语气较强的假设。意为“万一” If the car should break down on the way, you would have to walk back. 第十七张，PPT共四十五页，创作于2022年6月1. This printer is of good quality. If it _ break down within th

18、e first year, we would repair it at our expense.A. would B. should C. could D. might 2. I dont care what people think.Well, you _A. could B. would C. should D. might3. What do you mean, there are only ten tickets? There_ be twelve.A. should B. would C. will D. shallBCA第十八张，PPT共四十五页，创作于2022年6月4. -Wha

19、t does the sign over there read? -“No person _smoke or carry a lighted cigarette, cigar or pipe in this area.” 2007 四川卷Awill Bmay Cshall D. must 5. Whats the name? Khulaifi. _ I spell that for you?A. Shall B. WouldC. Can D. Might CA第十九张，PPT共四十五页，创作于2022年6月must1. 表示义务或强烈的劝告，意为“必须”“应该”， 其否定式表示“不应该”“不许

20、可” “不准”“禁止”。 (回答 must 所在的一般疑问句时，否定回答用 “neednt” “dont have to”.)1) You must finish your homework first.2) Children mustnt speak like that to their parents.3) -Must we finish the work tomorrow? -No, you neednt/ dont have to, but you must finish it in three days.flash第二十张，PPT共四十五页，创作于2022年6月1)Betty mus

21、t be in the next room. 2)Hemustbejoking.3)Thereisnobodyhere.Theymusthavegonehome. 2. must表推测，用于肯定句，意为“一定”“准是”。1)Why must it rain on Sunday?3. must可表示“偏要，硬要”，指做令人不快的事情或对某事的不满或责备等情绪。2)Must you make so much noise? 第二十一张，PPT共四十五页，创作于2022年6月1).I dont like this TV set. We _buy a new one. 2).There was no m

22、ore bus. They _walk home.表示“必须”这个意思时，must和haveto稍有区别。must着重说明主观看法，haveto强调客观需要。另外，haveto能用于更多时态。 must had tomust和have to第二十二张，PPT共四十五页，创作于2022年6月 1. In crowded places like airports and railway stations, you _ take care of your luggage.A. Can B. must C. may D. willB 2. - Karl, look, its 10 oclock. _

23、you play the piano so late?A. Can B. Must C. May D. WillB第二十三张，PPT共四十五页，创作于2022年6月1. We _ smoke here, because the worker is carrying some petrol.2. It is dangerous. You _ leave the room immediately.3. He _ go hiking with friends at weekends when young.4. -Write to me when you get home. -I _.will, wo

24、uld, shall, should, must:mustntshould/mustwouldwill表示禁止,不许可表示建议,命令表示过去习惯表示意愿第二十四张，PPT共四十五页，创作于2022年6月5. -Need I hand in my exercise book at once? -Yes, you_.6. You have been working all day. You _ be very tired.7. It is a long time since we met last time. You _ come and see us more often.8. Why dont

25、 you try on this dress? It _ look nice on you.mustmustshouldwill表示必须表示肯定猜测表示建议表示将会,一定会第二十五张，PPT共四十五页，创作于2022年6月Not sure Very sure He _ be in the classroom. He _ be in the classroom. He _ be in the classroom. He _ be in the classroom. He _ be in the classroom. 表推测的情态动词cancouldmaymightshouldmustmightm

26、aycouldshouldmust第二十六张，PPT共四十五页，创作于2022年6月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 现在 正在进行 过去情态动词may, might cant, couldntcan, could + V + be doing. + have done + V + be doing. + have done + V + be doing. + have done + V + be doing. + have done （可以用not表示“可能不”）第二十七张，PPT共四十五页，创作于2022年6月1)- Who _ the man

27、over there be? - It _ be our headmaster. He wears glasses.2)- It _ be him. He has gone to Beijing. - Then it _ be Mr Li. He looks like the headmaster.canmaycant/couldntmust第二十八张，PPT共四十五页，创作于2022年6月 注意：must 表示推测时， 只能用于肯定句。must domust have donemust be doing对一般时的肯定推测对现在的动作进行肯定推测对过去发生的事情作出的肯定判断第二十九张，PPT

28、共四十五页，创作于2022年6月他们买了一辆新车。 他们一定很有钱They have bought a new car. 他现在一定在看小说He _ novels now路是湿的。昨天晚上一定下雨了。The road is wet. They _ a lot of moneymust havemust be readingmust have rained, dont they?, isnt he?It _ last night, didnt it?他一定已经知道了。He _ it nowmust have known, hasnt he?第三十张，PPT共四十五页，创作于2022年6月 1.

29、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. He knew it. He _ the film last night. (see) 4. Your mother _ for you.你妈妈一定一直在找你。may/mightmust be markingmust have seenmust have been looking第三十一张，PPT共四十五页，创作于2022年6月5. Philip _ seriously

30、 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 hurtmay (might) have gonecant have found第三十二张，PPT共四十五页，创作于2022年6月 情态动词 + hav

31、e done这是历年高考热点之一，可表示“推测、责备、怀疑”等多种意义。第三十三张，PPT共四十五页，创作于2022年6月表示对过去所发生事情的遗憾或责备1. should/ought to have done “过去本该做”I really regretted wasting the hours when I should have studied hard, but it was too late.2. shouldnt/oughtnt to have done “本不该做” Im very sorry for the words I shouldnt have said to you a

32、t that moment.第三十四张，PPT共四十五页，创作于2022年6月表示对过去所发生事情的遗憾或责备3. could/might have done “本能够，本可以”I could have got higher marks in the exam.I was too careless.4. might have done “本可能”Tom, you shouldnt have played with the knife. You might have killed yourself.第三十五张，PPT共四十五页，创作于2022年6月You _ here to tell me ab

33、out it. I have known it.-Did you come to help him yesterday morning?-No. I was busy then. And I _.5. neednt have done “原本不必做的事却做了”Your home is not far from your school, so you neednt have left in such a hurry.6. didnt need to do/ didnt have to do “ 没有必要做，实际也没做” I didnt need to clean the windows. My

34、sister did it.neednt have comedidnt need to第三十六张，PPT共四十五页，创作于2022年6月1.He _ have completed his work; otherwise, he wouldnt be enjoying himself by the seaside. A. shouldB. mustC. wouldntD. cant 2. He paid for a seat, when he _ have entered free.A. couldB. wouldC. mustD. need BA第三十七张，PPT共四十五页，创作于2022年6

35、月3. As you worked late yesterday, you _ have come this morning.A. maynt B. cant C. mustnt D. neednt D4.Im sorry. I _ at you the other day. Forget it. I was a bit out of control myself.A. shouldnt shout B. shouldnt have shoutedC. mustnt shoutD. mustnt have shoutedB第三十八张，PPT共四十五页，创作于2022年6月5. Michael

36、_ be a policeman, for hes much too short. A. neednt B. cant C. should D. mayB6. - I stayed at a hotel while in New York. - Oh, did you? You _ with Barbara. A. could have stayed B. could stay C. would stay D. must have stayedA第三十九张，PPT共四十五页，创作于2022年6月7. My sister met him at the Grand Theater yesterday afternoon, so he _ your lecture. A. couldnt have attended B. neednt have attended C. mustnt have attended D. shouldnt have attendedA第四十张，PPT共四十五页，创作于2022年6月8. What a pity! Considering his ability and experience, he _ better.A. need have done B. must