九年级英语新目标上unit9-when-was-it-invented课件.ppt1

Unit9Whenwasitinvented?FourancientinventionscompassgunpowderMoveabletypeprintingpapercalculatormicrowaveovenlightbulbshighheelsadjustableheelsadjustable可调整的icecreamscoopheat加热scoopslippersabatterybatteriesoperate操作A:Whenwasthecarinvented?B:Well,Ithinkitwasinventedin….A.1885B.1876C.1927D.1971A:Whenwasthetelephoneinvented?B:Well,Ithinkitwasinventedin….A.1885B.1876C.1927D.1971Lookatthethings.Inwhatorderdoyouthinktheywereinvented?1aA:Ithinkthecalculatorwasinventedbeforethecomputer.B:Well,Ithinkthecalculatorwasinventedafterthecomputer.A:Ithink…wasinventedbefore…B:Well,Ithink…wasinventedafter….1bListenandmatchtheinventionswiththedates.abedc1876___1885___1927___1971___1976___dabecA:Whenwasthe_______invented?B:Ithinkitwasinventedin______.Pairwork(1c:P68)197618851876192719711879______wasinventedby_______.ThecarKarlBenzWhowasthecarinventedby?KarlBenzinventedthecar.Thepassivevoice.被动语态英语中动词有主动语态和被动语态两种语态.主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者,在被动语态中动作的执行者有时用by短语表示出来.被动语态的构成:助动词be+(及物动词的)过去分词一般现在时一般过去时am(is,are)+donewas(were)+done{Thepassivevoice.(被动语态)被动语态的用法:1.不知动作执行者时,常用被动语态.eg.Mybikewasstolenyesterday.2.不必要说出动作执行者时,常用.eg.Thecarwasinventedin1885.3.为了突出强调动作的承受者时,常用被动语态.eg.Thousandsofbeachesarepolluted(污染).Thepassivevoice.被动语态主动语态改被动语态:Bellinventedthetelephonein1876.wasbyA:Whatisthecarusedfor?B:Thecarisusedfortraveling.A:Whatisthe_______usedfor?B:Ithinkitisusedfor______________.talkingwithpeopleA:Whatistheusedfor?B:Ithinkitisusedfor_______.(count)countingA:Whatistheusedfor?B:Ithinkitisusedfor________.(work)workingA:Whatistheusedfor?B:Ithinkitisusedfor_____.(ride)ridingA:Whatistheusedfor?B:Itisusedfor___________.(count)countingA:Whatistheusedfor?B:Itisusedfor___________.(watchthethingsfarawayclearly)watchingthethingsfarawayclearly.A:Whatisthe________usedfor?B:Itisusedfor__________________makingthefoodhot.(makethefoodhot)A:Whenwas…invented?B:Itwasinventedin…A:Whowasitinventedby?B:Itwasinventedby…A:Whatisthe…usedfor?B:The…isusedfordoing…1.Weusethe________tocount.Thecalculator____________calculatorisusedforcounting.Themicrowaveoven_________________________2.Weuse___________________tomakethefoodhot.themicrowaveovenisusedfor3.The_______isusedfor_______________.(talkwithpeople)talkingwithpeopletelephonemakingthefoodhot.4.Who_____lightbulbs_________by?5.Thecomputer________________1976.wereinventedwasinventedinWhoweretheyinventedby?Whataretheyusedfor?adjustable可调整的operate操作heat加热2aListenandnumbertheinventionsintheorderthatyouhear.312InventionWhowasit/weretheyinventedby?Whatisis/aretheyusedfor?shoeswithadjustableheelsChelseaLanmonscoopingreallycoldicecreambattery-operatedslippersJayceCoziarandJamieEllsworthseeinginthedarkheatedicecreamscoopJulieThompsomchangingthestyleoftheshoesListenagain.Matchtheinventionswiththeirinventorsanduses.2bHelpfulinventionsAnnoyinginventionsExampletelephoneExamplealarmclock1.1.2.2.3.3.4.4.5.5.HelpfulinventionsAnnoyinginventionsExample:telephoneExample:alarmclock1.plane1.atomicbomb2.computer2.chemicalweapon3.bike3.mobilephoneSampledialogue1:•A：Whatdoyouthinkisthemosthelpfulinvention?•B：Ithinkthemosthelpfulinventionisthelightbulb.•A：Whyisthat?(Whydoyouthinkso?)•B：Well,itgivespeoplemoretimetoworkandplayeveryday.•Sampledialogue2:•A:Whatdoyouthinkisthemosthelpfulinvention?•B:Ithinkthemosthelpfulinventionisthecar.•A:Whyisthat?•B:Well,itmakesitpossibleforpeopletomovetodistantplacesfaster.Sampledialogue3:•A:Whatdoyouthinkisthemostannoyinginvention?•B:Ithinkthemostannoyinginventionistheatomicbomb.•A:Whyisthat?•B:Well,itgivespeoplemorepowertokillothers.Sampledialogue4:A:Whatdoyouthinkisthemostannoyinginvention?B：Ithinkthemostannoyinginventionisthealarmclock.A：Whyisthat?(Whydoyouthinkso?)B：BecauseitwakesmeupwhenI’msleeping.I’dliketohavea…becauseIcould…It’susedfor…Ithinkthemosthelpfulinventionis…Butthat’snotgoingtohelpyouleavetheisland.Ithinkitwouldbebettertohavea/an…youcanusethefollowingsentences:.Sampledialogue1:A:I’dliketohavearadiobecauseIcouldlistentomusicallday.B：Yes,butthat’snotgoingtohelpyouleavetheisland.Ithinkitwouldbebettertohaveaboat.Thenyoucanleavetheislandbyboat.A：Possiblyyouareright.Sampledialogue1:A:I’dliketohaveamonkeybecauseitcanpicksomefruitsforme.B：Yes,butwhatifthereisn’tenoughfruittreesontheisland?Ithinkitwouldbebettertohavelotsoffood.Thenyoucanhavesomethingtoeatbeforepeoplecometosaveyou.A：Maybeyouareright.汉译英。•（1）计算机是何时发明的？•（2）谁发明了计算机？•（3）计算器是用来做什么？•（4）你认为什么是最有用的发明？•（5）每天它能够给人们更多时间工作和玩。1.Whenwasthecomputerinvented?2.Whowasthecomputerinventedby?3.What’sthecalculatorusedfor?4.Whatdoyouthinkisthemosthelpfulinvention?5.Itgivespeoplemoretimetoworkandplayeveryday.1.Iopenthedoor.Thedoorisopenedbyme.2.Heoftenhelpshomelesspeople.Homelesspeopleareoftenhelpedbyhim.3.Ihandedoutsomepapersjustnow.Somepaperswerehandedoutbymejustnow.主动语态:主语是动作的执行者。被动语态:主语是动作的承受者。被动语态结构为：(主动语态)(主动语态)(主动语态)(被动语态)(被动)(被动语态)be+过去分词将下列句子变为被动语态。Period3-Whatkindoffooddoyoulike?-Ilikefoodthattastes…salty咸的,含盐的sweet甜的crispy易碎的,脆的sour酸的,酸味的bitter苦的hot辣的awful可怕的nice好的delicious美味的sweetcrispysaltysourpotatochipssourlemonicecreamsweetteasweet