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GrammarModalverbsⅡ情态动词Unit2.book3ByJerryRevisionTellthefunctionsofthemodalverbs.Youmustgo.Youhavetogo.Youmustn’tgo.Youdon’thavetogo.Youcanusemyphoneifyouwant.Pariscanbeveryhotinsummer.(aninternalneedorobligation)(anexternalneedorobligation)(prohibition禁止)(anabsenceofobligationorneed).(permission)(possibility)•Thechickenmustbecookedthoroughly.•Youhavetobookinadvance.•Visitorsmustremoveallfootwearbeforeentering.Iwillseeyoutomorrow.Thatmay/mightbeabetterthingtodo.Calculatorsmaynotbeusedintheexamination.(Necessity)(Necessity)(statingformalrulesandregulations)(willingnessorprediction)(Possibility)(Permission)MayIbeexcused?Thechildrenshouldn’t/oughtn’ttodroplitteronthefloor.Heshould/oughttocycletowork,theexercisewouldbegoodforhim.Thelettershould/oughttoarrivebyFriday.(requestsforpermission)(Obligation)(Suggestion,sayingwhatisthebestoragoodthingtodo)(Probability,indicatingthatsomeoneexpectssomethingtobetrueortohappen)ModalVerbDrill•POSSIBLE•IMPOSSIBLE•CERTAINWegoout.(CERTAIN)We’llgoout.Westayathome.(IMPOSSIBLE)Wecan’tstayathome.Wegotothecinema.(POSSIBLE)Wemightgotothecinema.1.Ihaveadrink.(CERTAIN)2.Ihavecoffee.(IMPOSSIBLE)3.Ihavetea.(POSSIBLE)4.Weworktonight.(POSSIBLE)5.Youworktonight.(IMPOSSIBLE)6.Iworktonight.(CERTAIN)7.Igohome.(necessity)8.Welookaftertheold.(duty/obligation)9.Wedotheworkrightnow.(suggestion)10.Wearelate.(prohibition)Reformulate(改写)thefollowingsentencesusingmodalverbsItisnecessarythatyouwearshoes.Itisnotnecessarythatyouwearshoes.Itisnecessarythatyoudonotwearshoes.Youmust/havetowearshoes.Youdon’thavetowearshoes.Youmustn’twearshoes.Itispossiblethathewenttothedentist.Hemayhavegonetothedentist.MatchtheAnswerstotheQuestionsandstudythemodalverbs.Modalverbs+have+pastparticiple•May/might+have+pastparticiplecanbeusedtotalkaboutapossibleeventinthepast,e.g.1.DoyouthinkAmymighthavearrivedbynow?sometimesbeusedtotalkaboutapossibleeventoccurringbeforeatimeinthefuture,e.g.2.Itmighthavebeensoldbythetimewegetthere.•Must+have+pastparticipleisusedtodrawaconclusion(得出结论,推论)aboutsomethingthathappenedinthepast,e.g.1.Iheardthatyourdogdied.Itmusthavebeenveryupsetting.•Should/oughtto+have+pastparticipleisoftenusedtotalkaboutsomethingthatdidn’thappenandthespeakerfeelssorrythatitdidn’thappen,e.g.1.Weshould/oughttohavestoodintheotherqueue,itwentdownquicker.•Should/Oughtto+have+pastparticiplecanbeusedtotalkaboutsomethingthatwasexpectedtohappeninthepast,e.g.1.Heshould/oughttohavearrivedearlierthismorning.•orthatisexpectedtohappeninthefuture,e.g.1.Thebuildersshould/oughttohavefinishedtheworkbytheendofthismonth.•shouldn’t/oughtn’tto+have+pastparticipleisoftenusedtotalkaboutaneventoractionthathappenedbutwhichthespeakerregrets,e.g.1.Heshouldn’t/oughtn’ttohaveboughtthatcar,it’salwaysbreakingdown.Completethesentences,tellingyourregretswhichyoudon’tmind.•Ishouldhave•Ishouldn’thave•IreallyshouldhaveThencompareyoursentenceswithyourpartner.Aninstantroleplay(即兴角色表演)Youarethemonitorcandidateforyourclass.Youhavejustlosttheelection.Youarespeakingtooneofyourassistant.Jumptoconclusions(结论)•workinpairsandmakeasmanysentencesaspossibleastowhatmayhavehappened,usingmodalverb+have+pastparticiple.e.g.WhenIarrivedatschooltoday,therewerepapersalloverthefloorintheclassroom.Possibleconclusions:Theremayhavebeenabreak-in.X(astudent’sname)mighthavegonecrazyandthrownthepapersaround.Somestudentsmayhaveplayedajoke.Theheadteachermusthavebeenfurious(狂怒的).Possiblesituations:1.Youwerestuckintrafficfortwohours.2.Youheardlouddancemusiccomingfromthestaffroom(教研室).3.Nostudentscametoclass.4.Whenyouwalkedin,allthestudentsstartedlaughing.5.Y(astudent’sname)wasfifteenminuteslate.Chooseonesituationandjumptoyourconclusions.Homework1.DoexerciseUSINGSTRUCTURESonpage50.2.Finishthelast28questionsontheexercisesheetaboutmodalverbshandedouttwoweeksago.