情态动词课件-高考英语一轮复习.pptx

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1、情态动词情态动词有哪些？must,can(could),may(might),ought to,shall(should),will(would),have(had)to,need,dare,have to,had better.情态动词本意01 can,could1.能力Can you lift this heavy box?Mar can speak three languages.Can you skate?be able to doThe baby will be able to walk in a few weeks.(将来的能力)The fire was very big,but

2、most people were able to escape from it.(过去某时某一场合设法做成了某事)2.表示请求和允许。-Can I go now?-Yes,you can./No,you cant.-Could I come to see you tomorrow?-Yes,you can.(No,Im afraid not.)3.表示客观可能性。(多用于肯定句)It can be very hot in our ciry in summer.Anyone can make mistakes.cant.too/enough:无论怎样.都不过分，越来越好You cant be c

3、areful enough to across the road.=You cant be too careful to cross the road.You can never do the work too well.cant help it:无计可施I couldnt help it if the bus was late.cant help doing:情不自禁may,might 1.表示请求和允许。-Might/May I smoke in this room?-No,you mustnt.-May/Might I take this book out of the room?-Ye

4、s,you can/may.(No,you cant/mustnt.)May I.？征徇对方许可时比较正式和客气。2.表示祝愿。May you succeed!May all your dreams come true.may/might as well:最好.，不妨You may as well stay where you are.may well:很可能.(be very likely to)Her appearance has changed so much that you may well not recognize her.must1.表示必须、必要。You must come

5、in time.-Must we hand in our exercise books today?-Yes,you must.-No,you dont have to/you neednt.2.偏偏，非得要Must you waste so much time?If you must smoke,please go outside the room.3.表示强调（口语）I must say,you are looking extremely well.must/have toMust是说话人的主观看法，而have to则强调客观需要。have to 有更多的时态形式。Shall/should

6、shall:1)shall 用于第一人称，第三人称，征求对方的意见。（问句）What shall we do this evening?2)shall 用于第二、三人称，表示说话人给对方的命令、警告、允诺或威胁。（陈述句）1.You shall fail if you dont work hard.(警告)2.He shall have the book when I finish it.(允诺)3.He shall be punished.(威胁)should：1.应该，应当（义务，职责）I think todays children should really learn to respe

7、ct their elders.2.表示惊讶，难以置信：竟然The man should be so rude to a lady.will/would1.表示请求、建议等，would更委婉。Will/Would you pass me the ball,please?2.表示意志、愿望和决心。I will never do that again.They asked him if he would go abroad.3.will 表示规律性的“注定会”You will fail if you dont work hard.Man will die without air.4.will 表示

8、习惯性，经常性，倾向性：经常，总是The old man is strange.He will sit there for hours without saying anything.The door wouldnt open,no matter how hard she pushed.would表示过去的习惯：总是，总会Every evening,she would sit by the window,deep in thought.would/used to1.Used to可指过去的状态或情况，would则不能。如：School children used to know the sto

9、ry of how Abraham Lincoln walked five miles to return a penny hed overcharged a customer There used to be to park here.2.used to 强调过去的行为同现在的对比，“过去怎样，则现在却不这样了。”would则表示单纯的过去习惯.He used to be a very strong man.过去很强壮，而现在体质差。We would sit in the yard every evening and listen to his story.(过去重复的行为)情态动词推测02

10、对目前状态动作推测：情态动词+do：I dont know where she is，she may be in Wuhan.对正在发生的事情的推测：情态动词+be doing：At this moment，our teacher must be correcting our exam papers.对已经发生的事情的推测：情态动词+have doneMike cant have found his car，for he came to work by bus this morning.Exercises03Peter _come with us tonight,but he isnt ver

11、y sure yet.A.must B.can C.may D.will.I didnt hear the phone,I _asleep.A.must be B.must have been C.should be D.should have been There was plenty of time,she _.A.mustnt have hurried B.couldnt have hurried C.must not hurry D.neednt have hurried Tom is late.He _the wrong bus.A.must take B.must have tak

12、en C.might take D.could take Though she was seriously ill,she _ complete the work in time.A.would B.was able to C.was possible to D.might Who told you my telephone number?I dont remember.It _Mary.It cant be Mary,she doesnt know it.A.may have been B.can have been C.must be D.can be He learnt the lang

13、uage in three months.He _very hard.A.must work B.might have worked C.must have worked D.might work _ you interrupt now?Cant you see Im one the phone?Sorry sir,but its urgent.mustYou _to town to see the film yesterday.It will be on TV tonight.A.neednt goB.had better not goC.should not goD.neednt have

14、 goneThe poor man needs our help,_he?A.needB.needntC.doesD.doesntYou _fail to pass the entrance examination if you dont study hard.A.couldB.mustC.shallD.shouldSome aspects of a pilots job_be boring,and pilots often _work at inconvenient hours.A.can;have toB.may;canC.have to;mayD.ought to;mustI didnt

15、 see her in the meeting-room this morning.She _at the meeting.A.mustnt have spokenB.shouldnt have spokenC.neednt have spokenD.couldnt have spokenWhy are your eyes so red?You _have slept well last night.Yeah,I stayed up late writing a report.A.cant B.musntC.needntD.wontYou cant imagine that a top student _have failed in the college entrance examination.A.mightB.needC.shouldD.would