英语：Module 6《Unexplaied Mysteries of the Natural World》教案-Grammar（外研版必修4）VIP专享VIP免费

Module6UnexplainedMysteriesoftheNaturalWorldGrammar---教案TeachingGoals:1.ToenableSstoknowaboutthewaytoexpresspossibilityandimprobability.2.ToenableSstomastertheusageof“may”,“might”,and“likely”.3.TohelpSslearnhowtousemodalverbs“may”and“might”toexpressconjecture.Teachingprocedures:Step1.RevisionChecktheanswerstotheVocabularyexercisesintheWorkbook.Step2.FunctionPurpose:ToletSsknowhowtotalkaboutpossibilityandimprobability.1.PairworkAskSstodoActivity1onpage54andthencallbacktheanswers.SuggestedAnswers:(1)a,b(2)c(3)unlikely2.GroupworkAskSstoidentifythecreaturesinthepicturesinActivity4onpage55,byusing“may”or“might”.Arousetheirinterestintalkingaboutpossibility.3.IndividualworkAskSstodoActivity2onpage54individually.Thenchecktheiranswers.SuggestedAnswers:(1)Theremightstillbedinosaurssomewhere.(2)Don’tgonearthewater.Itmaybeverydeep.(3)Weareunlikelytoseethemonster.(4)TheremaybeanundergroundriverfromLochNesstothesea.(5)Wemusthelphim–hemaynotbeabletoswim.(6)Therearelikelytobelotsofstrangecreaturesinthatlake.Step3.GrammarPurpose:ToenableSstoknowhowtousemodalverbs“may”and“might”toexpressconjecture.1.GroupworkAskSstodiscussthetwosentencesinActivity1ofGrammaronpage57,andthenaskthemtochoosethebestanswer.SuggestedAnswers:Weusemayhaveormighthave(withthepastparticiple)totalkaboutsomethingwhichhappenedinthepast—perhaps.2.ExplanationExplainhowtousemodalverbstotalkaboutsomethingwhichhappenedinthepast—perhaps.(1)对过去的事情进行猜测，但把握较小时，肯定形式一般用mayhavedone，否定形式一般用maynothavedone。如：Hemayhavegonebackhome,becausehedidn’tsayhewouldtakepartinherbirthdayparty.Hemaynothavepaidforthebill,becausehehadlosthisjob.(2)对过去的事情进行猜测，但把握更小时，肯定形式一般用mighthavedone，否定形式用mightnothavedone。如：Theyhelpedsendherbattothehospital;otherwise,shethought,thebabymighthavedied.ShemightnothavelefthomewhenIgottoschool.(3)对过去的事情进行猜测，并且可能性较大时，肯定形式一般用musthavedone，否定形式一般用can’thavedone。如：Yourscoreisthehighest;youmusthavestudiedveryhard.Youcan’thaveseenherinherofficelastFriday;she’sbeenoutoftownfortwoweeks.3.PracticeAskSstodoActivity2onpage57.Thencallbacktheanswersandcorrectthem.SuggestedAnswers:(1)mighthavecaused(2)mayhavecutoff(3)mayhavesurvived(4)mighthavebeenkilled4.SupplementsExplainhowtousemodalverbstotalkaboutsomethingwhichhappenedatpresent—perhaps.用来表猜测的情态动词有：must,can,may等，但它们所表示可能性是不同的。(1)对现在的事情进行猜测，并且可能性较大时，肯定形式一般用must加动词原形，此时，must不再表示“必须”，而是表示“肯定”；否定形式一般用can’t加动词原形，此时，can不再表示“能够”，而是表示“肯定不……”。如：Isawhimgooutjustnow.Hecan’tbeinhisownroom.ItmustbeLindaintheclassroom,becausesheisondutytoday.(2)对现在的事情进行猜测，但把握较小时，肯定形式一般用may加动词原形，此时，may不再表示“可以”，而是表示“可能”；否定形式一般用maynot加动词原形。如：Hemaytellthetruthtohisfather.Shemaynotangrybecausesheisgood-tempered.(3)对现在的事情进行猜测，但把握更小时，肯定形式一般用might加动词原形；否定形式一般用mightnot加动词原形。如：Shemightnotbeangrybecausesheusuallyisverypatient.Hemightbeathomenow,butI’mnotsure.(4)情态动词+动词现在进行时，表示对现在或将来正在进行的情况进行推测。如：Atthismoment,ourteachermustbecorrectingourexampapers.DoctorWangisn’there.Hemightbegivingalectureinthehall.(5)情态动词+动词的现在完成进行时，表示对过去正在发生事情的推测。如：Yourmothermusthavebeenlookingforyou.Thelightwasonthewholenight.Hemayhavebeendoinghishomeworkallthetime.5.ConsolidationAskSstotranslatethefollowingsentences.(1)他们也许错过了那班飞机。(2)快点！他们正在机场等我们。(3)Tom是个诚实的孩子。他今晚可能会把真相告诉他父亲。(4)他五年前来看过我，他也许不费劲就能找到我的住处。SuggestedAnswers:(1)Theymayhavemissedtheplane.(2)Let’shurry!Theymaybewaitingforusattheairport.(3)Tomisanhonestboy.Hemaytellhisfatheraboutthetruththisevening.(4)Hecametoseemefiveyearsago.Hemightfindmyhousewithoutanydifficulty.Step4.Homework1.AskSstoreviewGrammar.2.AskSstofinishGrammarexercisesintheWorkbookpages97~98.