Unit2Let'sCelebrate!Grammar課件高一英語

Attheendoftheclass,Iwillbeableto:1.identify(識別)themeaningsandformsofthemodalverbs(情態(tài)動詞)byobserving(觀察)thesentences;2.findoutthefunctionsofthemodalverbs(情態(tài)動詞);3.use

modalverbs(情態(tài)動詞)

tomakeadeduction(推測)orguess.LearningobjectivesTip:payattentiontothemeaningsandformsanditsusewhenyouarelearninggrammar.DarenotNeedn’t

Haveto

Beableto

Hadbetterbeafraidto/havenocouragehavetheabilitygiveadviceHaveto

HadbetterNeedn’t

necessityadvisabilityunnecessityConclusion-functionsadvisabilitycModalVerbs(情態(tài)動詞)forDeduction(推測)ByClareToday'slessonwillfocusonusingmodalverbsforcertainty,possibility.BlackFridaycanbeaverybusydayformyfamily.Theymightnotreceivetheirpresentsiftheywerenotgood.Childrenmustbeveryexcitedwhentheyreceivethegifts.Q:Whatdowordsinblueindicate:anorder,arequest,abilityorpossibility?.Task1Fillintheblankswithmustorcan’t.present(現(xiàn)在的)certainty(肯定)He

beachef.He

beapoliceman.(WeareverycertainheisNOTapoliceman.)must(Weareverycertain,becauseofhisuniformandwhatheisdoing.)can’tCarlaworkseverydayfrom9AMto5PM.Rightnowit’s10:30AM,so…She

beatwork.She

beathome.mustcan'talmost100%suremustmustcan'tTask3Identifytheformsandmeanings.PresentPossibility(可能性)Wecanusemay,mightandcouldtotalkaboutthingsthatarepossibleinthepresent.Where'sFred?He'snotinhisoffice.He

beinthebathroom...orhe

beinthemeetingroom.Don‘teatthatmushroom.It

bepoisonous(有毒的).maymightcouldTheweatherforecastsaysitmayraintomorrow.Yourdaughterisreallysmart.Shecouldbeverysuccessfulsomeday.Wemighttakearoadtripthisweekend.FuturePossibilityAreyousurethat'sagoodidea?Thebossmaynot/mightnotlikeitwhenhefindsout.Thebosscouldnotlikeitwhenhefindsout.Findoutthecorrectsentences.Thebosscouldnotlikeitwhenhefindsout.Wecanonlyusecouldinthepositiveform,notthenegativeform,fortalkingaboutpossibility.Howcertainareyou?Usethesemodalverbs:100%-completelyoralmost

certain50%-maybecertainmust,can’tmight,may,could,canHemustbeachef.Hecan’tbeapoliceman.Hemaybeinthebathroom...orhemightbeintheconferenceroom.Don'teatthatmushroom.Itcouldbepoisonous.Task5Fillintheblanks.certainty(肯定)andpossibility(可能性)aboutthepresentPossibility:must>can/could>may/might>can’t/couldn’tCertaintyaboutthePastWhenweconsidersomepresentevidenceanddrawareasonablycertainconclusionaboutwhathappenedinthepast,weusemusthaveandcouldn'thave+thepastparticipleoftheverb.Sheilagotatan.Shealotoftimeinthesunlastmonth.Therewasonebananaleft,butnowit'sgone.Mysisterit.Thecarwasstilldirty.Paulityet.Hebarelytouchedhislunch.Hebeenhungry.Emmy;shewasn'teveninclassyesterday.musthavespentmusthaveeatenmustnothavewashedcouldnothavebeencouldn'thavetakenyournotebookTask6Workingroupsandsummarizetherulesbasedonthesentences.musthave(ifyouthinkithappened),

couldn'thave(ifyouthinkit'simpossible).musthavecouldn'thavemusthavecouldn'thavePast

PossibilityWhentalkingaboutpastpossibilities,wecanuse...

mighthave/mayhave/couldhave+pastparticiple(forpositivepossibilities)andmightnothave/maynothave+pastparticiple(fornegativepossibilities).She'snothome.Shemighthavegonetothestore.Hemayhavemisunderstood

youwhenyoutalkedtohimyesterday.Thepersonwhostolethedocumentscouldhavebeenoneoftheemployees.John’snothere.Hemightnothaveknownaboutthemeeting.Ifshehasn’tcalledyouback,shemaynothavelistenedtoyourvoicemailyet.Task8Workingroupsandsummarizetherulesbasedonthesentences.couldn'thave(ifyouthinkit'simpossible).Itmightbehim.Youmustfeeltired.ThatmustbeLucy.Thatcan’tbeLucy.Theymaybefromourschool.Task10Rewritetheunderlinedsentencesintheconversationusingcan/could,may/mightandmust.Task10Lookatthepictureandmakeasmanysentencesaspossibleusingthefollowingmodalverbs.can/couldmight/maymustcan’tcould/might/mayhavedonecould/might/maynothavedoneShemustbeveryhappy,becauseshehasabigsmileonherface.Icanplaybasketballnow,butIcouldn’twhenIwasyoung.---CouldIuseyourphone?---Yes,ofcourseyoucan.A：MayIhandinhomeworklater，Vivian？

Vivian：Ok，youmay.B：MightIrecitethepassagetomorrow，Vivian？

Vivian:Ok,youcan.Mayyouhaveagoodtrip.AllthestudentsmustrecitethetwopassagesbeforethisSaturday.Youmustn’teatWeilonginclassroom.ImustsayEnglishisveryimportant.能力（could/can）請求（could/can）＆許可（can）征求許可（may/might）＆給予許可（may/can）祝愿（may）命令（must）強調(diào)（must）OtherfunctionsofmodalsForapossibilitythatsomethingdidNOThappenModalVerbsfordeductioncertaintybecertainthatsomethingis/wastrue(present)must+do(past)musthavedonebecertainthatsomethingis/wasimpossible(present)(past)can't+docouldn'thavedonepossibilitiespresentandfuturepossibilitiespastpossibilitiesmighthavedone,mayhavedone,orcouldhavedonemightnothaveandmaynothaveabriefsummaryofmodalverbsfordeductionSelf-AssessmentAttheendoftheclass,canI:identifythemeaningsandformsofthemodalverbs(情態(tài)動詞)b