初中英语语法专题辅导第九讲:情态动词课件.ppt
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- 初中英语 语法 专题 辅导 第九 情态 动词 课件
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1、主讲教师:王克平主讲教师:王克平情态动词情态动词 If you want to cross a street,you must wait for the green light.You mustnt cross in front of the traffic.If the light is yellow,you should wait.If you are not careful,a car may hit you.If you are in the UK,you have to drive on the left.and find out 情态动词,顾名思义是用来表达感情感情和态度态度的动词
2、。表明说话人的立场和口气,以及说话想达到的目的 常用的情态动词有:can(could),may(might),must,have to,need,ought to,shall,should 表能力表能力表推测表推测表请求、允许表请求、允许2013济南-_I help you,sir?-Yes,I want a T-shirt.A Can B Should C Must D Would(2010年北京)-you turn down your radio,please?-Yes,I can.A.May B.Need C.Must D.Can(2009年济南)-Whos that girl swim
3、ming in the pool?Is it Lucy?-It be Lucy.She is sleeping in her bedroom now.A.may B.cant C.must D.should1.表推测表推测2.表请求、允许表请求、允许1.-May I watch TV after supper?-Yes,you may.-No,You may not/cant./Youd better not.No,you mustnt.2.If you are not careful,a car may hit you.可以可以,表示许可,相当于can.(注意问句中的回答)注意问句中的回答)
4、2)可能,或许可能,或许,表示推测 may be 可能1.-May I watch TV after supper?-Yes,you may.-No,You may not/cant./Youd better not.No,you mustnt.(2010年福州)-Dad,must I do my homework now?-No,youplay games with your friends for a little while.A.would B.neednt C.may D.should(2009年广州)I take some photos in the hall?No,you.A.Ca
5、n;neednt B.Must;mustnt C.Could;wont D.May;mustnt1必须,应该You must finish your task before playing games.2表示推测,意为“一定”He must be at home now.3一般疑问句肯定回答用must,否定回答则用neednt或者dont have to.三、must的用法If you want to cross a street,you must wait for the green light.You mustnt cross in front of the traffic.-Must I
6、 be home before 8 oclock?-Yes,you must.-No,you neednt/dont have to.3.There must be something wrong with my computer.must:必须;mustnt:不准,禁止 回答带有must的问句时,否定式常用neednt 或dont have to.3)一定,表示肯定的猜测。(否定猜测用cant)2013泰安28.May I smoke here?-No,you .This is no-smoking room.A.neednt B.mustnt C.couldnt D.wouldntIf y
7、ou are in the UK,you have to drive on the left.The animals we eat have to spend their lives living in tiny spaces.have to 不得不不得不I have to be at work at nine oclock every day.She has to work on Saturdays.Theyll have to stay in a hotel.Does Dick have to go to Beijing on business?He didnt have to go th
8、ere last week.have to+动词原形have to 有人称、数、时态的变化 当主语为第三人称单数时,用has to+动词原形变问句或否定句时,需借助助动词。not have to=needntI have to be at work at nine oclock every day.She has to work on Saturdays.Theyll have to stay in a hotel.Does Dick have to go to Beijing on business?He didnt have to go there last week.I have to
9、be at work at nine oclock every day.She has to work on Saturdays.Theyll have to stay in a hotel.Does Dick have to go to Beijing on business?He didnt have to go there last week.have to+动词原形have to 有人称、数、时态的变化 当主语为第三人称单数时,用has to+动词原形变问句或否定句时,需借助助动词。not have to=neednt 2012北京()Mum,must I wash the dishe
10、s right now?No,you _.A.shouldntB.wouldntC.mustntD.neednt2013莱芜()Students in our school _ know shouting is not allowed in the library.A.can B.may C.must D.need2012威海()Must I learn all these words by heart?No,you _.Itll be fine if you copy them in your exercise books.A.needntB.cant C.shouldnt D.mustnt
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