初一情态动词语法讲解.ppt

Grammar：Modalverbs情态动词,情态动词（modalverbs)：表示说话人的语气或情态，如请求、命令、愿望、能力以及可能性等。英语的情态动词有：,can/couldmay/mightmustshall/shouldwill/wouldneedhaveto,能够可能必须应该意愿敢需要不得不,+动词原形,Shall一般只能用于第一人称。IshallthinkitoverandLetyouknowmyidea.我将考虑一下此事，然后告诉你我的想法。,情态动词不能单独作谓语动词，只能与动词原形一起做谓语，没有人称和数的变化。Abirdcanfly.Fishcantlivewithoutwater.Youmusthandinyourhomeworkatonce.Youmustnttalkloudlyinpublic.,能够(表能力),可以(表允许),必须,主语+can+动词原形,主语+may+动词原形,主语+must+动词原形,主语+cannot/cant+动词原形,主语+maynot+动词原形,主语+mustnot/mustnt+动词原形,Can+主语+动词原形？,May+主语+动词原形？,Must+主语+动词原形？,Yes,主语+can.No,主语+cant.,Yes,主语+may.No,主语+maynot.,Yes,主语+must.No,主语+neednt.,在口语中可用can代替，但may更礼貌。,1.Myelderbrother_(能)driveacar.否定句：一般疑问句：肯定回答：否定回答：就划线部分提问：,Practice,can,Myelderbrothercannot/cantdriveacar.,Canyourelderbrotherdriveacar?,Yes,hecan.,No,hecant.,Whatcanyourelderbrotherdo?,2.You_(可以)leavenow.否定句：一般疑问句：肯定回答：否定回答：就划线部分提问：,Practice,may,Youmaynotleavenow.,MayIleavenow?,Yes,youmay.,No,youmaynot.,WhenmayIleave?,3.Lily_(必须)gotothelibrary.否定句：一般疑问句：肯定回答：否定回答：就划线部分提问：,Practice,must,Lilymustntgotothelibrary.,MustLilygotothelibrary?,Yes,shemust.,No,sheneednt.,WheremustLilygo?,A.用must(not),may(not),can(not)填空：1.Idontunderstandthisword._Iuseyourdictionary?-Yes,pleaseuseit.2.Thetrafficlightisturningred.We_stop.3.You_borrowtwobooksatatime.4.Tom_playtabletennis,buthe_playfootball.5.Doctor,_Itakemuchmedicine?-No,youneednt.Butyou_drinkalotofwater.6.Tomisgoodatdrawing.He_drawwonderfulpictures.7.You_smokehere.Itsdangerous.8.-MayIturnontheTV?No,you_.Mydadissleeping.,TestYourself,May/Can,must,may/can,can,cant,must,must,can,mustnt/cannot/maynot,maynot,cant,TestYourself,B.单项选择：1.-_Iaskyouaquestion?-SureA.MayB.DoC.ShouldD.Am2.CanIgotothepark,Mum?-Certainly.Butyou_bebackbysixoclock.canB.mayC.willD.must3._youdance?Weneedsomemoredancersforthetalentshow.MayB.CanC.MustD.Should4.ImafraidIneedapairofglasses.I_hardlyseethewordsontheblackboard.canB.mustC.mayD.should5.You_crosstheroadnow.Youhavetowaituntilthelightturnsgreen.A.dontB.didntC.wontD.mustnt,TestYourself,6.MustIanswerthisquestioninEnglish?-No,you_.mustntB.cantC.needntD.shouldnt7.Alice,pleasebequiet!Theothers_hearclearly.cantB.mustntC.shouldntD.maynot8.IamafraidI_gowithyou.Iamverybusythesedays.maynotB.cantC.mustntD.shouldnt9.Iamgoingtobed.I_getupearl