七年级英语下册 Unit 6 Electricity Period 3 grammar课件 （新版）牛津深圳版.ppt

Unit6Electricity,ModalVerbs,Icanplaybasketballwell.Canyou?,No,Icant.ButIcanswimfast.,Icansingbeautifulsongs.Canyou?,No,Icant.ButIcanplaykonfu.Canyou?,No,Icant.,Acanandcannot,Weusecanandcannot(cant)tosayweareableornotabletodothings.,Wecanuseelectricitytodomanythings.Wecannot(cant)electricity.Canyouthinkofanexample?Yes,Ican./No,Icannot(cant).,1.Hi_playfootball.2.Lo_paintpictures.3.Hi_speakasmanylanguagesasLo.4.BothHiandLo_dance.5.Lo_driveacar,buthe_playchess.6.Hi_swim,buthe_playtheguitar.,can,cant,cant,can,cant,can,can,cant,Yes,youmay/can.,May/CanIsitdown?,_Icomein?,Yes,youmay/can.,No,youmaynot/cant.,May/Can,Bmayandmaynot,WeusemayandmaynottoaskforandGivepermission(许可）.Wealsousecanandcannot(cant)forthesamepurpose.,May/CanIuseyoumobilephone?Yes,youmay/can.No,youmaynot/cant.,Howareyoufeeling,Daisy?,Notverywell.,_Igetyouachair?,Yes,thanks,May,Imgoingout._Iborrowyournewbicycle?,Yes,youmay.Beforeyougotomeetyourfriends,canyoucomeandseethedoctorwithme?,May/Can,Yes,I_._Icarryyourbagforyou?,Yes,thatsverykindofyou,Benny.Imreadytogo._youopenthedoorforme?,Yes,Ican,Thanks,can,May,Can,Wemustsavewater.Wemustnotwastewater.,Youmustntsmoke.,Mustyoudohomeworknow?,Yes,Imust.Mustyoudoyourhomework?,No,Ineednt.Canyouplaywithme?,Sorry,Icant.Youmay/canplaywithJim.,Cmustandmustnot,Weusemustandmustnot(mustnt)totellpeoplewhattodoorwhatnottodo.,Youmustnot/mustntdothatBenny!Wemustalwaysbecarefulwithelectricity.Theymustnot/mustntplayneartheheater.,drinkmorewatergotobedearlyeatcoldfoodsharecupswithothersgooutalonetakethemedicineontime,1.Imustdrinkmorewater.2._3._4.Imustnot_5._6._,Thedoctortoldwhattodoandwhatnottodo,Imustgotobedearly.,Imusttakethemedicineontime.,eatcoldfood.,Imustnotsharecupswithothers.,Imustnotgoouralone.,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/mightmustoughttoshall/shouldwill/woulddare/daredneedhaveto,能够可能必须应该应该意愿敢需要不得不,+动词原形,can/could,能，能够，会，可以WecanspeakChinese.Hecandrawpictures.,许可Youcan(=may)gohomenow.,表怀疑，难以置信Hecouldnt(cant)beherfather,Forhestooyoung.,注意：could为can的过去式外，could还有表示语气婉转之义。CouldIcomein?比CanIcomein?更有礼貌。但答语还用Yes,youcan.No,youcant.,may/might,允许；请求MayIhaveaglassofwater?Mayyouborrowmeyourpen?,可能；也许(may比might语气强）Theymaybeinthelibrarynow.Hemightbeathome.,表示祝愿Mayyoualwaysbeyoung.,注意：might为may的过去式外，might还有表示语气婉转之义。MightIhavealook?比MayIhavealook?更有礼貌。但答语还用Yes,youmay.No,youmaynot.,must,必须；应该Wemustworkharder.,Mustnot意为不应该；不许；Wemustnotbeafraidofdifficulties.Youmustntsmokehere.,注意：must的提问肯定回答用must,否定用neednt-MustIreturnthebook?-Yes,youmust.-No,youneednt.,情态动词记忆口诀,情态动词两要点;动词原形跟后面,could/might说话语气较委婉,can表能力may许可,must责任或义务,否定回答neednt换;should/oughtto应该,will/would愿,haveto被迫,表客观.,TestforModalVerbs,1.-_Idownloadthearticleagain?-No,youneednt.A.ShallB.WillC.MustD.Can2.-MustIstayathome,Mum?-No,you_.A.neednt.B.mustntC.dontD.maynot,C,A,3.-MayIgoouttoplaybasketball,Dad?-No,you_.Youmustfinishyourhomeworkfirst.A.mustntBmaynotC.couldntD.mightnot,A,4.Acomputer_thinkforitself.Itmustbetoldwhattodo.A.cantB.couldntC.maynotD.should5.-CouldIborrowyourdictionary?-Yes,you_.A.mightB.mustC.canD.should,A,C,6.-_themantherebeournewteacher?-He_be,butImnotsure.A.May,mustntB.Can;mayC.Must;cantD.Can;cant7.You_bemorecarefulnexttime.mayB.mustC.couldD.might8.Students_smoke.cantB.mustntC.mightnot,B,B,B,9.IsthatKatescar?-It_behers.Shehasjustgoneforameeting.