高考英语二轮 情态动词和虚拟语气4课件.ppt

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1、情态动词和虚拟语气-By Bring English2021/8/11 星期三1 can,could may,might will,would shall,shouldmust,need have to,ought tocant,may not mustnt,needntdont have to shouldnt,shantbe able to dare情 态 动 词2021/8/11 星期三21.can,could表示能力He can speak English very well.He could draw very well when he was five.表示许可You can us

2、e my computer now.You cant eat in class.表示请求Can you tell me the way to the post office?Could you show me the way to the Beihai Park?2021/8/11 星期三3表示猜测Generally,she is a quiet girl.But sometimes she can be talkable.Someone is knocking at the door.Who can it be?It cant be Mr.Zhang.He has gone abroad.T

3、he hunters have been lost for days.They could starve.表示惊讶How can she be late for class?She is always on time.2021/8/11 星期三42.may,might请求许可May I have a look at your new mobile phone?表示可能The man over there may be your new teacher.He might come here by train or by air.2021/8/11 星期三53.will,would表示意愿、倾向O

4、n rainy days,she will sit by the window and watch the rain for hours.He was poor,but he would dress up as a rich man.表示请求Will you please give your seat to the old lady?Would you like to join us for dinner?2021/8/11 星期三64.shall用于第一人称，表示将要I shall go with you next time.用于第一人称，表示征求意见Shall I put the book

5、 back on the shelf?/Shall we go out for a walk?用于第二、三人称，表示许诺、义务、规定、威胁You shall get a new mobile phone if you pass the exam.Everyone shall wait in line when they buy tickets.According to the agreement,the interest shall be divided equally among the three investors.2021/8/11 星期三75.should表示建议（应该）You sh

6、ould lie down and have a rest.表示猜测Its seven oclock.Mr.Li should be there.You have practiced a lot.You shouldnt have any trouble in passing the test.表示惊讶Its surprising that such a pretty girl should be a thief.2021/8/11 星期三86.must表示必需We must finish our work by noon.表示猜测There must be something wrong.表

7、示责怪（偏偏，非得）Tom,must you play the piano at this time?My car must break down when I was hurrying to work.2021/8/11 星期三97.need表示需要（否定或疑问句）You neednt go to school today.用作实意动词You dont need to go to school today.2021/8/11 星期三108.have to表示必需，不得不You have to finish your work by noon.9.ought to表示应该You ought t

8、o hand in your homework before school is over.2021/8/11 星期三1110.dare表示 敢How dare you say that to your mother?She darent go out in the dark.He dared not ask the teacher for help.用作实意动词He dares to swim across the river by himself.Does he dare to swim across the river by himself?He doesnt dare to swim

9、in the river.2021/8/11 星期三12注意各种否定式：1.cant I cant play any musical instrument.(不能)It cant be possible.Its so rediculous！(不可能)2.mustntYou mustnt smoke in public places.(千万别)3.may notThat may not be true.(可能不)4.neednt (没必要)5.dont have to(没必要)6.shouldnt(不应该)2021/8/11 星期三13情态动词+have done1.must have done

10、 一定做过某事2.may/might/could (not)have done 可能(没)做过某事3.cant have done 不可能做过某事4.should(not)have done 本(不)应该做某事5.neednt have done 本没必要做某事6.ought(not)to have done 本(不)应该做某事7.would(not)have done 本(不)会做某事2021/8/11 星期三14虚拟语气一.在条件句中的用法if 从句动词从句动词主句动词主句动词与现在事实相反过去时（be用were）would/should/could/might+动词原形与过去事实相反过去

11、完成时（had done）would/should/could/might+have done与将来事实相反1.过去时（be 用were）2.should+do3.were+to dowould/should/could/might+动词原形2021/8/11 星期三151.If I were you,I would ask the teacher for advice.If he knew the truth,he would tell you.2.If you had come earlier,you would have met the famous star.She wouldnt h

12、ave been so angry if you had apologized to her.3.If it were to snow this evening,they would/should/could/might not go out.If it should break down within one year,we would repair it at our expense.If you went there,I would/should/could/might go with you.2021/8/11 星期三16需要注意的问题1.错综条件句 If you had follow

13、ed my advice,you would do it better now.If I were you,I wouldnt have missed the film last night.2.倒装句（省略if）Were she older,she would do it.Should he come,tell him to ring me up.Had we taken the taxi,we wouldnt have been late for the meeting.2021/8/11 星期三17二.介词短语等代替条件从句 Without air,there would be no l

14、iving things.But for your help,we wouldnt have finished the task on time.2021/8/11 星期三18三.根据上下文判定1.I would have come to your party,but I was too busy last night.2.I was too busy last night,otherwise I would have come to your party.3.You were driving too carelessly,otherwise you wouldnt be in hospita

15、l now.2021/8/11 星期三19四.在其他从句中的 虚拟语气1.I wish I had my own company.I wish I would travel in space some day.I wish I had known you earlier.2.I would rather you came here tomorrow.I would rather I hadnt seen the film.3.He talks as if he knew everything.He talks as if he had been to the moon.2021/8/11 星期三204.He suggested/ordered/requested.that.(should)do.5.It is important/strange/necessary that.(should)do.6.It is commanded/suggested/required that.(should)do.7.The requirement is that.(should)do.8.We all agreed to the suggestion/request/adviece that.(should)do.2021/8/11 星期三212021/8/11 星期三22