Unit 2 Lets celebrate!语法情态动词 课件 2025-2026学年高中英语外研版必修第二册

Book2

Unit2

Period3ModelverbsPairwork.Observeandanswer:Whodoyouthinkisthekiller?Why?1Usingthemodelverbs:must,can/could,may/mightAwomenmighthavebeenkilledinarestaurant.Thecasecouldn’thavebeen

asuicide自杀.Therewerefoursuspects,andoneofthemmustbethekiller.Thewomanmusthaveoffened得罪someone.crimescene犯罪场景Pairwork.Observeandanswer:Whodoyouthinkisthekiller?Why?1Wecouldn’tgetmuchinformationabouthim.Hemaybethekiller.Hemaynot.No.1Suspect嫌疑犯1may用于肯定句的猜测。可能性为50%Pairwork.Observeandanswer:Whodoyouthinkisthekiller?Why?1Therewasaknifeonhistable.Hecouldn’tbethekiller.No.2Suspect嫌疑犯2can/could表怀疑常用于否定句或疑问句中。can’t可能性为0%。Pairwork.Observeandanswer:Whodoyouthinkisthekiller?Why?1Shecouldenterladiesroomeasily.Shehadabag,soshecouldhidetheknifeinherbag.Shemightbethekiller.No.3Suspect嫌疑犯3might用于肯定句的猜测。可能性比may小，为30%。Pairwork.Observeandanswer:Whodoyouthinkisthekiller?Why?1Hisknifewasn’tonhistable.Therewasascaronhisneck.Hemust

bethekiller.No.4Suspectmust表示推测时，

只能用于肯定句。可能性为100%。Pairwork.Observeandanswer:Whodoyouthinkisthekiller?Why?1No.4Suspectcan/couldhavedone本可以做某事Icouldhavetalkedwithherpeacefully.Presentation.情态动词表推测1must,can,could,may,might情态动词表推测情态动词+动词原形情态动词+完成式（表示对目前的动作或状态进行推测）（表示对已发生情况的推测）情态动词must,can/could,may/might均可表示推测,它们可以对过去、现在或将来的情况作出语气强弱不同的推测。Presentation.情态动词表推测1过去现在mustmusthavedone过去一定一定(可能性100%)couldcouldhavedone本可以can’t/couldn’tcan’t/couldn’thavedone过去一定不一定不(可能性0%)may/mightmay/mighthavedone可能已经可能(可能性50%)表示肯定的推测时：语气从弱到强依次为might→may→could→can→must；表示否定的推测时：can’t/couldn’t语气较强，意为“不可能”；maynot/mightnot语气较弱，意为“可能不”。musthavedone过去一定。表示对已经发生的事情的肯定推测，语气较强。egItmusthaverainedlastnight.Thegroundiswet.may/mighthavedone可能已经。表示对已经发生过的情况的肯定推测，语气稍弱。egHe

may/mighthavegivenyoumorehelp,eventhoughhewasbusy.Presentation.情态动词表推测1couldhavedone过去一定不。表示对过去发生的一不定推测。egTheycan’thavegone

out,becausethelightison.can’t/couldn’thavedone本可以。表示过去本来能够做某事而实际上没有做egHecouldhavepassed

theexam,buthewastoocareless.Presentation.情态动词表推测1Practice.Recognizethewords.1Theymay/might/couldbefromourschool.Youmustbetirednow!Itmay/might/couldbehim.Thatmustbelucy.thatcan'tbeLucy.waveat招手bedressedas乔装打扮fancydresspartyBatmanbride

wordbandPractice.Readthedialogueandanswerthequestions.11.Whydon'tChrisandJeanrecognizetheirfriends?2.WhoisdressedasBatman?Becausetheirfrinendswearthefancydress.MaybeMikeisdressedasBatman.Practice.Rewritetheunderlinedsentencesusingcan/could,may/mightandmust.1Theymay/might/couldbefromourschool.Youmustbetirednow!Itmay/might/couldbehim.Thatmustbelucy.thatcan'tbeLucy.1.Whydon'tChrisandJeanrecognizetheirfriends?2.WhoisdressedasBatman?Becausetheirfrinendswearthefancydress.MaybeMikeisdressedasBatman.Exercises.根据句意，用情态动词的正确形式填空。1Idon'tknowwheresheis,she_____beinPinggao.Philip________________________(behurt)seriouslyinthecaraccident.——Lindahasgonetowork,butherbicycleisstillhere.——She_____________________(go)bybus.Mike_______________(find)hiscar,forhecametoworkbybusthismorning.Helooksyoung.He____________beover50.Shewasill.She___________________(attend)themeetinghere.maymay(might)havebeenhurtmay(might)havegonecan’thavefoundcan’t/couldn’tcouldn'thaveattendedViewing.Haveyoueverheardof“BlackFriday”?1BlackFridayisoneofthebusiestshoppingdaysoftheyear.Storeshavebigsalesandopentheirdoorsveryearly.Production.Lookatthepictureandmakeasmanysentencesaspossibleusingcan/could,may/mightandmust.1Thewomaninredmustbeveryexcitedtobuysomanythings.Themanwithawalletinhishandmightbeabitreluctanttopay.Thewomanwithglassesmaybeverytiredtogetupsoearlyandcarrysomanybags.Thecashiermightbefeelinguncomfortableasheissweatingalot....BlackFridayisoneofthebusiestshoppingdaysof