情态动词-can-could-may-might

Modelverbs情态动词1.表推测、可能性2.表许可，允许3.表责任，义务can,couldmay,mightmust,havetoshall,should,oughttowill,wouldusedtobetobesupposedtoneed,darecan,couldcan=beabletoIcanspeakalittleFrench.Canyouplayvolleyball?Evenasmallcomputercancalculateveryfast.会，能表能力can,couldcould=was/wereabletoIcouldswimverywellwhenIwasonlysixyearsold.Nobodycouldfigureoutthisproblem会，能表能力can,couldKeithcanbereallystubborn.ThewinterinChangchuncanbewarm.Anybodycanmakemistakes.ThewinterinChangchuncouldbewarminthepast.有时会表可能性（肯定句中）can,couldItcouldn'tbeDad.Hewon'tbebackthistimeofevening.Youcan'tbeserious!could比can可能性更小表可能性（否定句）不可能表示对过去的推测Ryancan'thavereadthisbook,becauseheknowsnothingaboutit本应该做Youarelateagain,youcouldhavecomeearlier.can/couldhavedone表可能性can,could1.请求（torequest）Canyougivemeahandwiththisbox?Couldyouhelpmewiththisbox?Can/couldyoumakealittlelessnoise?表许可can,could2.允许（tobeallowedto）-Can/couldIuseacalculatoratanexam?-Yes,ofcourseyou______.3.建议（tomakeasuggestion）Icould/candothehomeworkforyou,ifyouaretoobusy.表许可canmay,might1.请求（torequest）MightIhaveafewwordswiththeboss?-MayIhelpmyselftosomemorefood?-Ofcourseyou_______.2.允许（tobeallowedto）Areadercanborrow6booksatonetime.Areadermayborrow6booksatonetime.may表许可may;might可能（toexpresspossibility）Thereasonofthisaccidentmayneverbediscovered.Petermightphone.Ifhedoes,couldyouaskhimtoringlater?表可能性may表祝愿Maysb.do...Mayyouallsucceedinwhateveryoudo!Mayyoubothbeveryhappy.作业1.编故事；2.must