高二英语教案示范教案Unit13Thewaterplanet3rdperiod高二

学而思教育·学习改变命运思考成就未来！高考网:ReviewModalVerbs.TeachingDifficultPoint:HowtohelpthestudentscorrectlyusetheModalVerbs.TeachingMethods:1.ReviewmethodtohelpthestudentsrememberalltheModalVerbstheyhavelearntbeforeandusethemcorrectly.2.Individualworkorgroupworktomakeeverystudentworkinclass.TeachingAids:1.themultimedia2.theblackboardTeachingProcedures:StepⅠGreetingsandRevision(Greetthewholeclassasusual.)T:Yesterdaywelearnedapassageaboutwaterandnowwhocanretellthepassageinyourownwords?S1:Letmetry.…T:Welldone.Thankyouforyourperformance.StepⅡWordStudyT:NowpleaseturntoPage21.LookatthefirstpartofWordStudy.Therearesomewordslearntinthelastperiod,butthelettersofthesewordsareinthewrongorder.NowIwillgiveyouafewminutestoputthelettersinthecorrectorder.(Afewminuteslater,teachermayasksomestudentstospelltheiranswersandgivetheChinesemeaningofeachwordtoallthestudents.Finallyteacherwritesthecorrectwordsontheblackboard.)1otmasatoms2tanomuamount3sdliosolid4oasbrbabsorb5cgrnetideacentigrade6saggas7nhroygdehydrogen8yoxgenoxygen9assmmass10fatolfloatT:Goodwork.Nextlookatthescreenandtrytocompletethefollowingsentencesbyfillingintheblankswiththeproperwords.Thefirstletterhasbeengivenandsomewordscanbeusedmorethanonce.Ifyouneed,youcanhaveadiscussionwithyourpartner.(Teacherusesthemultimediatoshowthefollowingsentencesonthescreen.)学而思教育·学习改变命运思考成就未来！高考网℃andintoag_____whenheatedabove100℃.3.Ana_____isthesmallestpartofanylivingornonlivingthing.4.Placesbytheseaoftenhaveas_____climatethatisnevertoohotortoocold,becausewatercana_____andreleasealotofheat.5.Soilcana______water,soithelpskeepwaterfromflowingaway.6.Marinescientistsstudyther_____betweenlivingcreaturesandtheirhabitatintheocean.7.Saltwaterhasalowerf______pointandisheavierthanfreshwater.8.Oilhasadensitylowerthan1000kg/m3,soitwillf______onwater.(Teachergivesstudentsenoughtimetoprepareandthenchecktheiranswers.)Suggestedanswers:1.hydrogen,oxygen2.liquid,solid,gas3.atom4.steady,absorb5.absorb6.relationship7.freezing8.floatStepⅢGrammarT:Uptonowwehavelearntmanymodalverbs.Whocantellmewhattheyare?Ss:…(Teacheraskssomestudentstowritetheiranswersontheblackboard.)ModalVerbs:can/could,may/might,will/would,beableto,must,should,haveto,need,shall,oughtto,hadbetter.T:Verygood.Thendoyouknowhowtousethem?S2:Iknow“should”canbeusedtogiveotherssomeadvice.S3:IknowwhenIwanttoborrowabookfrommyfriend,Icanuse“may”.…T:Youranswersareverygood.Thereisaconclusionaboutmodalverbsonthescreen.Let’slookatit.(Teacherusesthemultimediatoshowtheconclusiononthescreen.)ModalVerbs:Possibility:can/could,may/mightAbility:can/could,beabletoRequests:can/could,will/would,wouldlikeNecessity:must,haveto,havegotto,needCertainty:must,will,shouldPermission:can/could,may/mightSuggestions:couldmay/might,shallAdvice:should,oughtto,hadbetterT:Fromthechartwecanseemodalverbscanbeclassfiedintoeightgroupsbytheirusages.Areyouclearabouttheclassification?Ss:Yes.T:OK.NowlookatthefirstpartinGrammar.Finishtheexercisesaccordingtotheclassficationofmodalverbs.Ifyouneed,youcandiscusswithyourpartner.Inadditionyou’dbetter学而思教育·学习改变命运思考成就未来！高考网、B、C,orD.Areyouclearabouttherequirements?Ss:Yes.(Teachergivesstudentsenoughtimetofinishtheexercises.Thendealswiththemwiththewholeclass.)T:Areyouready?Ss:Yes.T:OK.Who’dliketotellmetheanswertothefirstone?S4:Ithink“A”isright.T:Canyoutellusthereasonwhyyouchoose“A”?S4:Becausethespeakerwantstoexpresshis/herrequest.AmongA、B、CandD,onlyAcanbeusedtoexpressrequest.T:Verygood.Whataboutthesecondone?S5:“May”isright,Ithink,becausethesentenceisusedtoaskforpermission.T:Congratulations!Whocananswerthethirdone?S6:Thephrase“wantsto”expressastateofbeingnecessity.SoIthink“C”isright.T:Welldone.It’sturntodothefourthone.Whocantry?S7:I’mnotsure,butIwanttohaveatry.Is“C”right?T:Whydidyouchoose“C”?S8:Ithinkthefirstsentenceexpressessomenecessityandthesecondoneexpressesguess.S9:Idon’tthinkso.Because“must”can’tbeusedinnegativesentencestoexpressguess.S8:Oh,I’msorry.Iforgotit.Isee,thecorrectansweris“D”.T:Excellent!…(Teacherencouragesstudentstoshowtheiropinionsabouteachone,andthenteachergivesthecorrectanswersandsomenecessaryexplanations.)Suggestedanswers:1.A2.A3.C4.D5.A6.A7.A8.B9.AT:Youhavefinishedthefirstpartsuccessfully.Nowlet’sgoonwiththesecondpart.Doyouhaveconfidencetofinishit?Ss:Yes.Ofcoursewehave.T:OK.ThisisaletterfromMarytoJohn.MaybeJohnmetsomeproblems,soMarywantstowritealettertohelphim.ButMarydoesn’tknowhowtousethemodalverbscorrectly.Shewantsyoutohelpherfinishtheletter.Beforeyoufinishtheletter,readittogetthegeneralideaofitfirstandthenanswerthequestionsonthescreen.(Teacherusesmultimediatoshowthequestionsonthescreen.)1.CanyoutellfromtheletterwhatJohn’sproblemis?2.DoyouagreeontheadvicethatMarygivestohim?Why?Whatwouldbeyouradvice?(T