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1、情态动词一、定义:情态动词必须搭配动词原形一起构成谓语。情态动词没有人称和数的变化。二、考点:情态动词的用法和词义辨析,由情态动词引导的一般疑问句的回答。三、种类:情态动词词义否定形式词义can能够,会can’t不能,不会could能够,会couldn’t不能,不会may可以,可能//must必须mustn’t不允许,不能shall将,要//should应该shouldn’t不应该need需要needn’t不必would将会,愿wouldn’t不会,不愿四、用法及主要句型:1.can①表示“能,会,可以”。Canyouplaybasketball?②表
2、猜测,常用于否定句或疑问句,即can’t,表“一定不是”。LiHuacan’tbeintheclassroom.回答:Yes,~can.No,~can’t.CanIhelpyou?——Yes,please./No,thanks.CanIborrowyourbook?----Yes,ofcourse.CanIwriteonthebook?------No,youcan’tmustn’t.CouldCanyouhelpme?----Yes,ofcourse.Certainly.Sure.CouldCanyoutellmethewaytothezo
3、o?2.could①can的过去式IcouldswimwhenIwassevenyearsold.②could开头的疑问句,语气比can委婉。回答:Yes,~can.No,~can’t.(或根据语境)CouldIhaveadrink?Yes,youcan.3.may①表示推测,“可能,也许”,用于肯定句。Eg:Hemaycometomorrow.②表示请求,“可以”Eg:MayIborrowyourbook?回答:—MayIsmokeintheroom?—Ofcourseyoumay[can].—No,youmaynot[mustn't,can't].
4、(语气较生硬)—You'dbetternot.—Pleasedon't.4.should/shouldn’t表示征求对方意见或劝告:1)Heshouldgetupearly.2)Sheshouldn’tplaycomputergametoomuch.3)Youshouldlistentoyourteacher.回答:Yes,~should.No,~shouldn’t.5.shall用于第一人称(I,we),1)Whereshallwehavedinner?2)Shallwegofishing?-----Allright.OK.Goodidea.S
5、hallIopenthewindow?Shallwehavelunchhere?肯定回答:Allright.OK.Goodidea.否定回答:Sorry,Ican’t/Ishallnot.6.must①表示“必须,应该”。②表示推测,常用在肯定句中,表“一定”。Eg:Thereissomeoneknockingatthedoor.ItmustbeJim.③否定句中,mustn’t表示禁止,“不允许”。回答:肯定回答用must,否定回答用needn’t=don’thaveto不必要7.need需要肯定句回答用must,否定句回答用needn’t.Yo
6、uneedn’tcometoschoolsoearly.8.表示征求对方的意见,或建议。“你愿意…吗”Wouldyouliketogoshoppingwithme?回答--Yes,I’dloveto./I’dliketo.No,thankyou.Wouldyoulikesomethingtoeatdrink?----Yes,I’dlike…练习( )1. youlikesomemilk?A. WouldB. CouldC. Can( )2. Wepicktheflowerinthepark.A. can’tB. don'tC. mustn
7、’t()3.W eshouldmoretrees,andweshouldn’tcutanytrees.A. plantB. plantingC. plants()4.MayIhavesomecoffee?A.Yes,youhave. B. Yes,youcan. C. Yes,certainly.()5.Shallwevisitthefactory?A.Yes,wedo.B.Yes,weshall. B.Allright.()6.Wouldyoulikesomethingtoeat?A.Yes,wewould.B.Yes,I’dlikesom
8、ecakes.C.Yes,ofcourse.()7.WhatcanIdoforyou?A.Ye