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情态动词一、情态动词的定义：情态动词有词义，但它不能单独作谓语，它必须和其他动词一起构成谓语。情态动词没有人称和数的变化；它的后面必须跟动词原形。二、情态动词的种类：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／／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，不愿三、情态动词的用法及主要句型：1、CanIhelpyou?——Yes,please./No,thanks.2、Can+主语+动词原形?Yes,～can.No,～can’t.3、CanIborrowyourbook?----Yes,ofcourse.4、CanIwriteonthebook?------No,youcan’t\mustn’t.5、Could\Canyouhelpme?----Yes,ofcourse.\Certainly.\Sure.6、Could\CanyoutellmethewaytotheZoo?7、MayIcomein?-----Comein,please.8、MayIsithere?-----Yes,please.\Sorry,pleasedon’t.9、MayIhavesomeCoke?----Yes,ofcourse.10、May/Could/CanIspeaktoTom?-----Speaking.Who’scalling?11、should、shouldn’t表示劝告：1)Heshouldgetupearly.2)Sheshouldn’tplaycomputergametoomuch.12、Should+主语+动词原形?Yes,～should.\No,～shouldn’t.13、表示建议“你愿意…吗”Wouldyouliketogoshoppingwithme?-----Yes,I’dloveto./I’dloveto.ButI’mbusynow.14、就餐用语Wouldyoulikesomethingtoeat\drink?----Yes,I’dlike…15、shall用于第一人称(I,we),可以表示“将”和表示建议“……好吗?”1)Whereshallwehavedinner?2)Shallwegofishing?-----Allright.\OK.\Goodidea.16、Must+主语+动词原形?---Yes,～must.\No,～needn’t.(一)用适当的情态动词填空。1.MustIborrowthebookwithmyIDcard?No,you________.2.________Iuseyourcar?Yes,you________.3.________Igohomenow?No,you_________stayhere.4.Mymotherisill.I_________stayathomeandlookafterher.5.________youlikesometea?6.You________takemoreexercise.7.________youtellmehowtogettotheQingyunPark?8.Theclock________tellusthetime.9.________youliketogofishingwithme?10.________weplayfootballthisafternoon?(二)按要求改写句子。1.Icanrunfast.I________________fast.(否定句)2.Youmustreturnthebooknow.（一般疑问句）________Ireturnthebooknow?No,you________.3.Hecanplaybasketballwell.（一般疑问句）_______he______basketballwell?4.Theymusttakethebooksoutoftheroom.（否定句）They________________thebooksoutoftheroom.5.Heshouldgetupearly.(否定句)He_______getuplate.(三)单项选择。（）1.youlikesomemilk?A.WouldB.CouldC.Can（）2.Wepicktheflowerinthepark.A.can’tB.don'tC.mustn’t()3.Weshouldmoretrees,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’dlikesomecakes.C.Yes,ofcourse.()7.WhatcanIdoforyou?A.Yes,youcan.B.No,Icandoit.C.Yes.I’dlikesomeoranges.