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1、Discoveringusefulstructures---ModalVerbsFunctionsofModalVerbs(p5)AbilityAdviceAgreementGuessingPasthabitNecessityPermissionPossibilityPredictionPromiseRequest(1)表示能力(ability)CanyouspeakJapanese?Shecouldplaythepianowhenshewas6.*beableto①tense②gainthroughhar
2、dworkThegirlwillbeabletospeakEnglishwellinafewmonths.IcouldswimwhenIwasonly6.1.can/could(2)表示允许(许可或请求许可)(permission/request)--Can/CouldIgonow?--Youcangonow,buthecan’t.Iampolite~Whenyouask,Iamtheoneyouwant~requestpermission(3)表示理论上或习惯上的可能性(肯定句)E.g.1Itcanbeq
3、uitecoldhereinwinter.E.g.2Accidentscanhappenatanytime.E.g.3Itcouldbeveryexcitingtogooutforadrive.possibility(4)推测(guessing)(can限于否定句,疑问句,could不受此限)E.g.A:Someoneiscoming!Whocanitbe?B:ItcouldbeJohn.C:Itcan’tbehim.B:Well.Itcouldn’tbehim.Iampolite~Conclusion1C
4、an/could(1)表示能力(ability)(2)表示允许(许可或请求许可)(3)表示理论上或习惯上的可能性(肯定句)(4)推测(guessing)(can限于否定句,疑问句,could不受此限)could可表示能力或可能性,多用于过去,也可指现在,通常表示虚拟或作为can的委婉形式。Tips1.惯用形式“cannot…too…”表示“无论怎么……也不(过分)”。如:Youcannotbetoocareful.你越小心越好。2.惯用形式“cannotbut+不定式(不带to)”表示“不得不,只好”。如:
5、Icannotbutadmireherdetermination.我不得不钦佩你的决心。2.may/might(1)表示请求、许可(requestorpermission)--May/MightIaskyouaquestion?--Yes,youmay./Yes,youcan./Yes,please.--No,youcan’t./No,youmustn’t.Iampolite~Ifyoumustask,well,donotchoose“might”.(2)表示愿望(wish)Mayyoubehappyall
6、yourlife.MayGodblessyou!Mayyousucceed.Maysb(verb)…!(3)表示推测(possibility),多用于肯定句和否定句might比may可能性更小Itmay/maynotbetrue.Hemight/mightnotcometoday.Conclusion2may/might(1)表示请求、许可(requestorpermission)(2)表示愿望(wish)(3)表示推测(possibility),多用于肯定句和否定句,might比may可能性更小Tips惯
7、用句式:“mayaswell或might(just)aswell+动词原形”意为“最好,满可以,倒不如”,相当于“hadbetter”.Youmayaswelltellusnow,we’llfindoutsoonerorlater.Thereisnothingtodo,soImayaswellgotobed.3.will/would(1)表示请求、建议等(request,adviceetc)WillyouhelpmewithmyEnglish?Wouldyoupassmethebook?Iampolite~
8、(2)表示意志,愿望,决心等。(willingness)will表示现在的意愿,would表示过去的意愿Gowhereyouwill.SheaskedifIwouldgowiththem.Iwillneverdothatagain.NomatterwhatIsaid,hewon’tlistentome.不乐意,不肯(3)表示习惯,倾向性,固有性质。will表示现在的习惯,would表示过去的习惯(=usedtod