1、Can1.表能力表能力e.g. I can speak French.2.表許可（肯定句）或請求（疑問句）表許可（肯定句）或請求（疑問句）=maye.g. CanCould I look at your watch？ -of course you can. could use the computer.3.表推測表推測(疑問和否定句疑問和否定句)cant/couldnt do/bee.g. what he said couldnt be true. He cant be a student.e.g. Can it be true? Taday is Sunday.He cant be at s

2、chool.cant /couldnt be doing(不可能正在做某事)cant/ couldnt have done（不可能已經做了某事）4.表理論上的可能性表理論上的可能性Even experienced teachers can make mistakes.4.表理論上的可能性表理論上的可能性 can make mistakes. can happen at any timecould be very interesting to go out for a drive.can be quite cold at noght here.Can和和be able toCan 表示本身具有的

3、能力表示本身具有的能力be able to在某特定場合下，經過努力做到很在某特定場合下，經過努力做到很難做到的事難做到的事e.g. I shall be able to finish the work next week.e.g. Tom was able to escape from the fire yesterday.e.g. The young man can,t carry the big stone.Maymight1.表允諾，許可表允諾，許可(can)e.g. you may smoke here. Yes,may. No,mustnt/cantYoud better not)2

4、.表示祝福, 用于祈使句3.表示推測 “可能”“肯能”=can may/might do/bemay/might be doing(可能正在做某事)may/might have dong（可能已經做了某事）Maymight4.May might as well do(最好。最好。)e.g, you may as well stay at home.shall1.一三人稱疑問句，向對方提出建議。一三人稱疑問句，向對方提出建議。e.g. Shall I tell him the news?2.二三人稱二三人稱陳述句，說話人得允諾，命令，威脅，警陳述句，說話人得允諾，命令，威脅，警告等。告等。e.g

5、. you shall do as what I say.3.在規章制度在規章制度e.g. everyone shall get to school at six.e.g. Can i get out in the daytime ?NO, the school rules state that no child_be allowed out during the day,unless accompanied by an adult.should1.應該應該e.g. You should keep your promise.2.常規推測（理應）常規推測（理應）e.g. It is nearly

6、 seven .Jack should be here at any moment.3.竟然，表驚訝竟然，表驚訝e.g. How should you be so rude to you mother.4.用在用在IF條件句中，表一定程度的可能性。（萬一）條件句中，表一定程度的可能性。（萬一）If you should happen to meet Marry,give her this package.If you should change your ming,please let me know.5.should (ought to)have doneshouldnt (ought no

7、t to)have done責備責備be supposed to have donee.g. you should have called me right awaye.g. you shouldnt have told her the news.6.用于第一人稱表示說話人的謙遜，客氣，委用于第一人稱表示說話人的謙遜，客氣，委婉的語氣。婉的語氣。e.g. You are mistaken .I should say.依我看你是依我看你是搞錯了搞錯了e.g. I should advise you not to do that.我到是建我到是建議你別這樣做！議你別這樣做！7. 一個一個“堅持堅持

8、”insist二個二個“命令命令”order， command四個四個“建議建議”suggest（suggestion） advise（advice ）propose （proposal）recommend（recommendation）五個五個“要求要求”demand desire, require，request，aske.g.I insisted that she (should) do her work alone and I did so out of love. e.g.My suggestion is that we should go to see a doctor.(表語從句

9、表語從句)e.g.My suggestion that we should go to see a doctor was accepted。e.g.It is suggested that we should go to see a doctor 。 8. 用在用在“It is+形容詞形容詞+that+.（should )+ do”it is necessary that I should study hard.It is natural that young people should be often uncomfortable when they are with their paren

10、ts(necessary, strange, natural, important, essential, right, impossible, vital）Must1.表禁止表禁止e.g. You must not play with knife2.表非得，偏要表非得，偏要e.g. must you play the piano at midnight? Must3.推測推測 （只用于肯定句（只用于肯定句）must be a teachermust be reading upstairsmust have finished the homework.The light is still on

11、, so he must be at home. 燈還是亮的，他一定在家。燈還是亮的，他一定在家。The light was out. They must have gone to bed. 燈都熄了，他們必定睡了。燈都熄了，他們必定睡了。(can could 只能用于否定句只能用于否定句)Musthave to區別區別I must study hardI have to study hard回答說回答說:Yes .mustNo ,.dont have to No, .needntwill、would1.表意愿表意愿e.g. They say they will help us. If you

12、 will help me, I will appreciate it.2.用于第二人稱的疑問句中，表詢問對方意愿用于第二人稱的疑問句中，表詢問對方意愿或向對方提出要求或向對方提出要求e.g. WillWould you stay here?2.表一般傾向表一般傾向,規律性規律性,習慣習慣e.g. The drawer wont shut.e.g. My pen wouldnt write.e.g. Fish will die out of water.e.g. Oil will float on water.Would 表示過去經常性反復性發生的動作used to 過去存在但是現在已經停止e

13、.g. He would sit for hours like this He used to read in the sun.dare need1.實義動詞實義動詞Sb dareneed to do sb dontdoesntdidnt dareneed to doe.g. I dare to say I need to bathe2.情態動詞（否定和疑問句和條件句）情態動詞（否定和疑問句和條件句）e.g. He neednt stay here.e.g. He darent stay here.sbsth need to be donesbsth need doinge.g.Tom nee

14、ded to be punished.e.g.Tom needed punishing.e.g.The door needs to be painted by a skilled worker. (need,want ,require)情態動詞重點考點情態動詞重點考點1.must+have+done” e.g. It must have rained last night, for the ground is wet,_? e.g. You must have been mad to speak to the servant,_? 2.cant/ couldnt have donee.g. M

15、r. Smith cant have gone to Beijing, for I saw him in the library just now. e.g. Mary cant have stolen your money. She has gone home. 3.may/might (not)have doneWhat has happened to George?I dont know. He may have got lost.4.could have done e.g. If youd given the job to me ,I could have done it in hal

16、f the time.e.g. Why did you type the letter when I could have done it for you easily by computer? 6.shouldnt have done=ought not have donee.g.Look, Tom is crying. I shouldnt have been so harsh on him.7.neednt have done e.g.I neednt have bought so much wineonly five people came. 8.would have done The

17、 victim _ (本來會有機會活下來) if he had been taken to hospital in time.If I hadnt been busy that day, I would have gone there with them【經典考例1】 The weather turned out to be fine yesterday. I _ the trouble to carry my umbrella with me. A. should have taken B. could have takenC. neednt have taken D. mustnt hav

18、e taken【經典考例2】 We _ have proved great adventurers, but we have done the greatest march ever made in the past ten years. (2006天津)A. neednt B. may not C. shouldnt D. mustnt【經典考例3】 As you worked late yesterday, you _ have come this morning. （2006陜西）A. maynt B. cant C. mustnt D. neednte.g. He thought she could h