Module5ATripAlongtheThreeGorgesPeriod2Grammar—Revisionofmodalverbs■Goals●Torevisethemodalverbs■ProceduresStep1:RevisingmodalverbsModalVerbsCANCOULDMAYMIGHTWILLWOULDSHALLSHOULDOUGHTTOMUSTNEEDDAREWhendoweusemodals?Totalkaboutsomeone’sability(orinability)todosomethingexample:“Wecanfindyourhousewithoutthestreetplan.”“Shecan’thaveasonthatold!”Totalkaboutanactionthatisnecessary(orimpossible,ornotnecessary)example:“Youmustalwayshaveyourdriver’slicensewhenyouaredrivingyourcar.”“Youneedn’tcarryyourwalletaroundwithyou.”Totalkaboutasituationthatispossible(orimpossible)example:“Dobecarefulwiththatcup,thecatmightknockitover”Amodalverbalwayshasthesameform:Thereisnopastform(-ed),nopresentparticiple(-ing)andno3rdpersonssingular(-s).Modalverbscomebeforethesubjectinquestions:example:“MayIcometoyourschoolforthebook?”Negativeforms:Modalverbshaven’tornotaftertheminthenegative.example:“mustn’t”–“needn’t”.PRESENTFORMPASTFORMcancouldmaymightwillwouldshallshouldmust-oughtto-用心爱心专心need-Step2:RevisingotherusesofmodalverbsApartfrombeingusedtodescribedegreesofcertainty,modalverbscanalsobeusedinthefollowingways:Obligation,prohibitionandlackofobligationWeusemusttoconveystrongobligation.Thepastformofmustforobligationishadto:YoumustimproveyourEnglishhandwriting!Wehadtoleavehisfarmimmediately.Weuseshouldtoconveymilderobligation.Thepastformofshouldformildobligationisshouldhave:Youshouldseealawyer.Youshouldhavegonetovisityourparents.Weusemustnottoconveyprohibition.Thepastformofmustnotforprohibitioniswasn't/weren'tallowedto:Youmustnotgointothestreet—it'sdangerous.Weweren’tallowedtouseourhandphonesinthebuilding.Weuseneedn’ttotalkaboutalackofobligation.Thepastformofneedn'tforlackofobligationisneedn’thave:Youneedn’tgotothemeeting.Weneedn’thavementionedit—theyalreadyknew.Weusemayandcantogivepermission.Thepastisconveyedbywas/wereallowedto:Youmaycomeinnow,boys.Canwesinginhere?Theprisonerswereallowedtositdowntalktothepoliceman.Wewereonlyallowedtospeakinthezoo.Weusecantospeakaboutability.Thepastformofcanforabilityiscould:Hecanspeakfivethreelanguages.Shecouldplayer’hubeautifullywhenshewasten.Weusewilltosaywearewillingtodosomething:Iwillcome,butonlywithmyparents.Willyouactasguide?Weusewon’ttosaywearenotwillingtodosomething.Thepastformofwon’tiswouldn’t:Iwon’tdoit,andthat'sfinal!Hewouldn’tpromiseanything.Wecanusewilltotalkaboutactionsthatarehabitual.Thepastformofwillfortypicalbehavioriswould:用心爱心专心Shewillspendhourschattingonline.Hewouldwashhisfaceeveryevening.Step3:TakingatestonmodalverbsFillingintheblankwithoneofthefollowingmodalverbs:Can,Could,MayandMight1.They(can/might)________________beawayfortheweekendbutI'mnotsure.2.You(may/might)________________leavenowifyouwish.3.(Could/May)________________youopenthewindowabit,please?4.He(can/could)________________befromSheffield,judgingbyhisaccent.5.(May/Can)________________youswim?6.Listen,please.You(maynot/mightnot)________________speakduringthisexam.7.They(can’t/maynot)________________stillbeout!8.You(couldn’t/mightnot)________________smokeonthebus.9.Withluck,tomorrow(can/could)________________beacoolerday.10.You(can/might)________________berightbutI’mgoingbacktocheckthetimes.Keys:1.might2.may3.Could4.could5.Can6.may7.can’t8.couldn’t9.could10.mightStep4:AbsorbinformationconcerningNationalCollegeEntranceExamin...
