情态动词shall-should--must-用法及练习.ppt

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1、Modal verbs1.shall(1)用于疑问句与第一、三人称连用，表用于疑问句与第一、三人称连用，表示征求意见或请求许可。示征求意见或请求许可。1)Shall we go out for a meal together?2)Shall the newcomer have a try?1.-The room is so dirty._ we clean it?-Ok.A will B Shall C Would D Do(2)用于肯定句与二、三人称连用，表示用于肯定句与二、三人称连用，表示说话人的说话人的 允诺，决心，威胁，警告，允诺，决心，威胁，警告，命令，或法律、文件的命令，或法律、文

2、件的 规定规定 。Nothing shall stop me from going there.You shall be sorry for what you have done,I tell you.决心决心威胁威胁/警告警告3.You shall get an mp5 as your birthday present this year.4.The fine shall be paid in cash.5.Persons under 18 shall not be employed.（允诺允诺）（规定）（规定）（规定）（规定）“The interest(利息利息)_ be divided

3、into five parts,according to the agreement,”declared the judge.A.may B.should C.must D.shall2.should1).Children should be devoted to their parents.2).You shouldnt be so careless.ought not to2）比较有依据的推测将来某种情况，）比较有依据的推测将来某种情况，“按理说会，估计会按理说会，估计会”1)Its 2:30,They should be here now.2)The glasses should be

4、enough for each guest.3)We should arrive before dark.4)The roads should be less crowded today.(3)表示惊讶、遗憾、表示惊讶、遗憾、“竟然，居然竟然，居然”Im glad that his son should have won the first prize.Its strange that he should fail again.You cant imagine that a well-behaved gentleman _ be so rude to a lady.A.might B.need

5、 C.should D.wouldThere _ be any difficulty about passing the road test since you have practiced a lot in the driving school.(05 上海上海)A.mustnt B.shant C.shouldnt D.neednt-When can I come for the photos?I need them tomorrow afternoon.-They _ be ready by 12:00.A.can B.should C.might D.need Its nearly s

6、even oclock.Jack _ be here at any moment.A.must B.need C.should D.can 3.must-Must I do it at once?-Yes,you_./-No,you _.(=No,you _mustneedntdont have to)You mustnt waste any more time.You must not smoke here.禁止禁止,不可以不可以,千万别千万别2)肯定推测，肯定推测，“一定，准是一定，准是”（只能用于（只能用于肯定句肯定句）1.She must be tired after such a l

7、ong walk.2.He must be sleeping now.-Hi,Tom.Any idea where Jane is?-She _ in the classroom.I saw her there just now.A shall be B should have beenC must be D might have been(3)must 表示固执表示固执,不满不满,意为意为“偏偏，偏偏，偏要偏要,非得非得”-May I smoke here?-If you _,choose a seat in the smoking section.A.should B.could C.ma

8、y D.must John,look at the time,_ you play the piano at such a late hour?A.Must B.Can C.May D.Need1.Why must you always break in when others are talking?2.If you must break the law,of course,you will be punished.1.Trees are good for man.We cant plant them _ many.A so B such C too D enough2.In a rely race,a player cant run fast _.A so B such C too D enough