Unit9Whenwasitinvented?第一课时SectionA教学目标：学习一般过去时的被动语态和特殊疑问句Step1WarmingupShowsomepicturesorthingstothestudent,andwritesthewords(telephone,computer,TV,alarmclock,lightbulb,calculatorbattery-operatedslipper)ontheblackboard.T:Whatcanyouseeinthepicture?S:Wecanseealightseealightbulb.Askstudentstoreadthewordstogether.Step2WatchingandtalkingChooseinventionsinthebooktoaskstudentstoguesswheneachonewasinvented.Haveseveraldifferentstudentsguessandwritethedateontheblackboard,andaskthemtonumberthepicturesintheorderwhattheythink.(Accordingtothetimewhentheywereinvented?)T:Whenwasthecarinvented?S1:Ithinkitwasinventedin1885S2:Ithinkitwasinventedbeforethecomputer.S3:IthinkitwasinventedaftertheTV.Step3Listeningandpractice.Askfivestudentstoreadthedateofthesethingsinvented.Then,playthetape,thestudentsmatchtheinventionswiththedates.Usethisinformationtopractice1c,andaskseveralgroupstoroleplay1c.Step3Listeningandpractice.Askfivestudentstoreadthedateofthesethingsinvented.Then,playthetape,thestudentsmatchtheinventionswiththedates.Step4Listening2aMakesuretheyknowthemeaningofthesethings.Thenplaythetape,thestudentsnumbertheinventions2bReadtheinstruction.Listenagain,matchtheinventionswiththeirinventorsandusesReadthelisteningtextandunderstandit.Step5PairworkAskstudentstousetheinformationin2btomakedialogue,andthenpresentthemforotherstudents.Homework：Writethewords.第二课时教学目标：熟练掌握被动语态用法，学会用被动语态表达对发明事物的认识和看法。Step1RevisionAskstudentstouse“beinventedbeusedfor”toaskandanswerthequestions.Pointoutitispassivevoice.Use“allowsbtodosth,beallowedtodosth”tomakesentences,leadthemtosaywhichoneispassivevoice,whichoneisactivevoice.主动语态：主语是谓语动词的执行者。被动语态：主语谓语动词的承受者。Step2GrammarFocusReadthesentencesinGrammarFocusandtranslatethemintoChinese.Thenfindoutthestructureofthespecialquestion.Step3CompetitonAskstudentstorecitethesentencesinseveralminutes,andthenhaveadictationbetweenboysandgirls.Step4PairworkReadtheinstruction,makesuretheyunderstand“Whatarehelpfulinventions?Whatareannoyinginventions?”Dividethemintotwogroupstomakealistoffivehelpfulinventionsandfiveannoyinginventions.Askseveralstudentstoreadouttheworkandtellwhy?Step5PracticeHaveacompetitionamongthegroups,findoutwhichgrouprecitethedialoguethemostquickly.Step6ImagineAskthem“Ifyouwerealoneonatinyisland,youcantake5things,Whatthingsdoyouchooseandwhy”Exercise：翻译句子：1．电池拖鞋用来在黑暗里照明。2．计算器是1971年发明。3．电脑是谁发明的？4．你认为最有用的发明是什么？5．每天电灯给人民更多的时间去工作，去玩。第三课时SectionB教学目标：学会表达这些创造和发明对你的生活的帮助或对生活质量的提高的认识。Step1WarmingupT:Ilikeapplesbest.Whatkindoffruit/food/drinkdoyoulikebest?S:IlikeFrenchfries.T:Why?S:Becauseit’sverycrispyandsalty.Writethethingsandthetastesontheblackboard,andaskthemtoreadthemtogether.Step2PresentationAskstudentstolookatthepicturesin1a,andanswer“Whatarethey?”andthendescribehowfoodtastesandfinish1aand1b.Step3ListeningPlaythetape,circle“T”“F”Keypoint:1.bymistake错误的，偶然的（byaccident,bychance）Itookyourumbrellabymistake.2.intheend=atlast=finally最后，终于Step4ListeningListentothetapeagainsentencebysentence,andaskthemfillintheblank.Atlast,askthemtoreadthelisteningtextfollowthetape.Exercise:同意句转换：1.Whendidtheybuildtheschool?When______theschool_____...
