北师大版高二英语必修5Unit13Lesson3教案

Lesson3GuessingaboutPeopleTeachingAims:TopractiseusingmodalsforspeculationTodistinguishbetweenmodalsusedfordecision,adviceandspeculationTeachingdifficulties:TopractiseusingmodalsforspeculationTeachingAids:computer,cassetteTeachingprocedures:Ⅰ.WarmingupT:Firstlookatthetitle“GuessingaboutPeople”Whocantellmewhat’sthemeaningofthetitle?S:T:“Guessingaboutpeople”meansmakeajudgeaboutpeoplewithoutbeingsureofallthefacts.IndailylifeIfwearecuriousorworriedatsomebodyorsomethingweoftenmakevariousguess.Thinkoverwhichwordswewillusewhenweguesswhatwillhappen?Whathappened?S:must,may,maynot,can,can’tandsoon.T:nowwewilllistentoadialogueinwhichtherearealotofwordsaboutspeculation.ⅡListeningListentothedialoguetodotheexercise1.Thetwostudentsweremissing______.A.becausetheywereseparatedfromtheotherstudents.B.inacave.C.forthereasonwedon’tknow.2.Thedialoguetellsus______.A.Thetwostudentsdisappeared3daysago.B.MycousinknowwheretheyareC.Therescuersfoundtheminacottage.3.Thedialoguemakesvariousguessedexcept_________.A.Theymustbefrightened.B.Theybothareinjured.C.Theymighthavesomefoodtoeat.Answers:1.C2.A3.BT:Canyousayoutthemainideaofthestoryinyouownwords?S:T:Nowlet’slookatwhetheryourstoryistrueornot.Dotheexercise2ListentothedialogueagainandcompletethegapsPlaythecassetteonceforstudentstolistenandthenagainforthemtocompletethegaps.ⅢGrammarDotheexercise3.Thetwopeopleinthedialoguemakevariousguessesatthetwomissingstudents.Theyusethefollowingsentencesbutyouneedtocompletethegapswithmodalverbs.Checkstudents’answersbyhavingthemreadthesentencesaloud.Drawtheirattentiontothedifferentinfinitiveformsafterthemodals.Dotheexercise4.Asaclassstudentsdiscussthemeaningofthesentencesinthetableanddecideiftheyexpressdecision,adviceorspeculation.Askstudentshowtheywouldexpressdecision(isgoingto;isaboutto;)andadvice(should,hadbetter,)Dotheexercise5Thegrammarwelearntodayismodalverbs.Modalverbscanexpresspossibility,permission,intentionandguess.Nowdotheexercise5.Whichofthemodalverbsinexercise3expressthefollowing.Dotheexercise6Asawholeclass,studentsdiscusswhatthesentences1-3arereferringtoandmatchthemwitha,bandc.Guidestudentstoanalysisthemodalverbs’useinthepast,inthefutureandnow.用在肯定句中：对过去的推测：may/mighthave+PP(过去分词)musthave+pp(过去分词)对现在的推测：mustbe+noun/adjmaybe/mustbe+vingmust+v(原形)用在否定句中对过去的推测：can’thave+PP(过去分词)对现在的推测：can’tbe+noun/adjcan’t+v(原形)Dotheexercise7,8and9topractiseandconsolidatemodalverbsDosomeBestChoicetoconsolidatemodalverbs1.—DoyouknowwhereDavidis?Icouldn’tfindhimanywhere.--Well.He_____havegonefar—hiscoat‘sstillhere.A.shouldn’tB.mustn’tC.can’tD.wouldn’t2---Excuseme.IsthistherightwaytotheSummerPalace?---Sorry,Iamnotsure.Butit_____be.A.mightB.willC.mustD.can3.---Tomgraduatedfromcollegeataveryyoungage.---Oh,he_____havebeenaverysmartboythen.A.couldB.shouldC.mightD.must4.---Iheardtheywentskiinginthemountainslastwinter.----It____truebecausetherewaslittlesnowthere.A.maynotbeB.won’tbeC.couldn’tbeD.mustn’tbe5.Jack______yet,otherwisehewouldhavetelephonedme.A.mustn’thavearrivedB.shouldn’thavearrivedC.can’thavearrivedD.needn’thavearrived6.---Didn’tyouknowthatyouwentdrivingat100kilometersanhour,Madam?---_____.Myoldcarcandonomorethan80,officer.A.ImaynothavebeenB.Icouldn’thavebeenC.Imustn’thavebeenD.Ishouldn’thavebeenAnswers:1.C2.A3.D4.C5.C6.CⅣHomeworkItispossiblethatsomestudentscan’tmastertheuseofmodalverbsindividually.Sotheteacheraskstudentstodotheexercise10and11aswrittenhomeworktofindoutthemistakesofstudentstohelpthem.Anotherpurposeistosavetimeinclassandgivestudentsenoughtimetodowelltheexercise.