1、Period 4 Period 4 GrammarGrammarModal VerbsModal VerbsThe first wealth is health.健康是人生第一财富。A light heart lives long.豁达者长寿。Early to bed and early to rise makes a man healthy,wealthy and wise.早睡早起会使人健康、富有和聪明。Without health no pleasure can be tasted by man.没有健康就没有乐趣。Good health is over wealth.健康是最大的财富。
2、What should/shouldnt we do to keep healthy?If youd like to give advice or opinions,you can useshould/ought to/had better doWhat ought we to do to keep healthy?Good habits can help us to keep healthy and bad ones can cause diseases.There is a serious disease called H1N1 flu these days.It spreads easi
3、ly among people in spring and autumn.The flu is a serious disease,but we dont have to be afraid of it.We can do something to prevent it.But how?We ought to keep the air fresh all the time.We ought to keep away from crowded places.Wed better drink more water every day.You should go to school right aw
4、ay.Its eight oclock now.He should be at work.It seems so unfair this should happen to me.You should have reminded me of the meeting.What should we do now?表惊讶：竟然用于第一人称疑问句，询问对方的意愿表责备，谴责What kind of food must we eat to be strong?must/have toMust I finish the task right now?Yes,you must/you have to.No,y
5、ou neednt/you dont have to.She called me yesterday evening but I didnt hear it.I _(be)asleep.must have been 1.-Will you stay for lunch?-Sorry,_.My brother is coming to see me.A.I mustnt B.I cant C.I neednt D.I wont 2.-May I pick a flower in the garden?-_.A.No,you neednt B.Not,please.C.No,you mustnt
6、D.No,you wont.3.You _ return the book now.You can keep it till next week if you like.A.cant B.mustnt C.neednt D.may not 4.John,you _ play with the knife,you _ hurt yourself.A.wont;cant B.mustnt;may C.shouldnt;must D.cant;shouldntC B BCmustntneednt shouldnt cant表示否定的情态动词的用法:不准,禁止没必要(=dont have to)不应该
7、(=ought not to)不能，不可能Could you use them to make sentences?What modal verbs have you learned?can/could may/might will/would shall/should had better must have to need ought to dare*can/could 只能表示现在或过去的能力*be able to 能用于各种时态相当于manage to do sth./succeed in doing sth.1.表示“能力”的情态动词的用法 can,could（be able to）
8、1.He _ go to the party yesterday evening in spite of the heavy rain.2.Although he _swim,he _ cross the river.was able tocantwas able tomay/might,can/could2.表示“许可”的情态动词1.-_ I go out to play,mum?-No,you_.You should do your homework first.A.Might;wouldnt B.Can;neednt C.Can;cant D.Need;mustnt 2.-Could I
9、 call you by your first name?-Yes,you_.A.will B.could C.can D.might3.表示“请求”的情态动词的用法will/would,shall/should*均可表示将来。过去时为 should,would.*will,would 可表示意愿、常出现的动作。在疑问句中表示请求和建议.must,could,may,might,cant4.表示“推测，可能性”的情态动词can 表示推测时，只能用在否定句或疑问句中。Its so late.Can Tom be reading?这么晚了，汤姆还在看书吗？这个人不可能是玛丽，她生病了。It cou
10、ldnt be Mary.She had fallen ill.情态动词能表示时态吗？1.表示对现在的推测2.表示对过去的推测3.表示对将来的推测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对将来对现在对过去情态动词may,might cant,couldntcan,could+V.+V.+have done常见must be +be doing+V.+V.+have done +be doing可以用not表示“可能不”+V.+V.+have done +be doing+V.+V.+have done +be doingYou look tired.You _
11、 go to bed now.should You _ believe everything you read on the Internet.shouldnt/cantMy mother cooked a lot of food for me.She hasbeen cooking all the morning.She must be tired now.I have just eaten a lot of food for lunch.You cant be hungry now.My house is near the railway.It _ be noisy there.mustT
12、he old restaurant _ be very good.Its always full of people.The new restaurant _ be very good.Its always empty.mustcantWhere is Jane?Perhaps she is reading newspapers.=She _(read)newspaper.may be readingIn China,many children _ wear uniform when they go to school.have toDont tell anybody what I said.
13、You _ keep it a secret.must The floor is clean.You _ sweep it.neednt The floor is clean.You _ swept it.must haveI promised I would be on time.I _ be late.couldnt Last night Paul became ill suddenly.We _ call the doctor.had to We cant repair the car ourselves.We _ take it to a garage.have to I can ma
14、nage the shopping alone.You _ come with me.neednt That is an important book.You _ keep it well.must Excuse me,_ you tell me the way to the railway station,please?could You are carrying a lot of things.You cant open the door yourself.Theres a man standing near the door.You say to him:_ you open the d
15、oor,please?Could _ you like a cup of coffee?Would 1.I thought youlike something to read,s oIh a v eb r o u g h ty o us o m eb o o k s.Am a yB.m i g h tC.c a nD.m u s t2.Y o uto the meeting this afternoon ify o u h a v e s o m e t h i n g i m p o r t a n t t o d o.A.neednt to comeB.dont need comeC.do
16、nt need comingD.neednt come3.Heyou more help,even though he wasv e r yb u s y.A.m i g h th a v eg i v e nB.might giveC.can have given D.m a y give4.-I help you with some shoes,madam?-Yes,I would like to try on those brown ones.A.W i l lB.S h o u l dC.M a yD.M u s t5.T he r ea s on why theyl e a v e
17、w a s ntexplainedtous.A.h a dB.h a d t oC.m u s t D.m i g h t6.I s e a r c h e d f o r m y w a l l e t a n d i t w a s ntt h e r e.It h o u g h tIi ta th o m e.A.l e f tB.h a v e l e f tC.m i g h t h a v e l e f tD.c a n h a v e l e f t7.I _ _ a s l e e p b e c a u s e i t t o o k m e a l o n gt i m
18、 e t o r e a l i z e t h a t t h e t e l e p h o n e w a sringing.A.could have fallenB.should have fallenB.C.must have fallenD.mustnt have fallen8.The only thing that really matters to the children is how soon they _ return to their school.A.canB.must C.have to D.ought to9.I want to go to Marys,but
19、you _ go with me.A.need not B.must not C.need D.must10.What we _get seems better than what we have.A.can B.couldC.cantD.couldnt11.-My goodness!Ive just missed the train.-Thats too bad.I am sure you_ it,if you had hurried.A.could have caught B.had caught C.would catch D.could catch12.Look!What youve
20、done!You more careful.A.may be B.had toC.should have been D.would be13._I repeat the question?A.Shall B.Will C.Do you want that D.Do1.There were already 5 people in the car,but they managed to take me as well.It a comfortable journey.A.cant beB.shouldnt beC.couldnt have been D.mustnt have been1.Tom
21、ought not to _me your secret,but he meant no harm.A.have told B.tell C.be telling D.having told.I parked my car right here but now its gone.It.A.must be stolenB.may be stolenC.must have stolen D.must have been stolen.He the work yesterday,but he didnt.A.must have finished B.need finish C.finishedD.should have finished.He did not pass the examination.As a good student,he.A.mustnt have failed B.may not have failed C.neednt have failed D.shouldnt have failed
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