modal verbs必修3 语法情态动词的用法课件.ppt

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1、GrammarModalverbsByChenzhengrui情态动词（ModalVerbs)Can/couldMay/mightWill/wouldShall/shouldMust/can’tability能力possibility可能性advice建议agreement赞同guessing猜测necessity必要性permission许可prediction预测promise许诺request请求pasthabit过去习惯Can/couldJimisn'tverygoodatmathsorscience,buthecanspeakEnglishverywell.Ourhistorytes

2、twassolonglastweekthatnoonecouldfinishit.Itwasthelastdayofschool,buttheteachersaidthatwecouldnotleaveearly.Thehuntershavebeenlostfordays.Theycouldstarve.CouldyoupleaseshowmethewaytoBeihaiPark?可能性能力请求可能性能力may/mightWhatawarddidyougetforthesportscompetition?MayIhavealook?Ourfootballteamdidn'tplayverywe

3、lltoday,butwemightdobettertomorrow.请求许可可能性DuringtheSpringFestivaltimethewholefamilywillcomefordinner.Myunclewaspoorbutlikedfashion,sohewouldoftendressupasarichman.AreyoufreethisSaturday?Wouldyouliketojoinmyfamilyfordinner?will/would许诺请求过去习惯预测TheharvestfestivalbeginsonSaturday.Weshallbetherewithourfr

4、iends.Whengoingbyplane,youshouldarriveattheairportatleastonehourearly.It'snearlytimeforclasstostart.Theteachershouldbeheresoon.shall/should许诺建议预测Whenyoueatfishyoumustbecarefulwiththebones.WangFenghaswontheEnglishcompetitionthreetimes.Hemustbeverysmart.AmanlandedonMars?Youmustbejoking.Thatcan'tbetrue

5、.must/can't建议必要性猜测猜测may/might1).表示许可(疑问句)。表示请求，允许时，might比may的语气委婉。否定回答时，可用can或mustn’t,表示“不可以，禁止，阻止”之意。---MayItakethisbookout?---Yes,youcan./No,youcan’t(mustn’t).2).用于祈使句，表示祝愿Mayyousucceed!3).表示推测，可能（不用于疑问句）Thebottlelooksblue.Theremay/mightbesomeinkinit.can/could1)表示能力或客观可能性Icandrawahorseinfiveminute

6、s.Mancannotlivewithoutair.2)表示请求或允许。could表示请求时语气较委婉，主要用于疑问句，但回答时应用can---CouldIcallyoubyyourfirstname?---Yes,youcan.3)用于否定句和疑问句，表示推测。Theyounggirlcan’t/couldn’tbeournewchairman.Canthenewsbetrue?3.will/would1).表示请求，建议等，would比will委婉客气Wouldyoupassmethebook?2).表示意志，愿望和决心Iwillneverdothatagain.3).would可以表示过

7、去反复发生的动作或某种倾向。Duringthevacationhewouldvisitmeeveryweek.4).表示估计或猜想Ithoughthewouldhavetoldyouallaboutit.4.shall/should1).shall用于第一、第三人称时，表示征求对方的意愿或向对方请求。Shallwegoforapicnicthisweekend?2).shall用于第二、第三人称时