英语人教版九年级全册when was it invented课件.ppt

人教九年级英语Unit6,Whenwasitinvented?,SectionA(1a-1c),Doyouknow?,WhataretheFourGreatInventionsintheancientChina?,Doyouknowwhenitwasinvented?,Whowasitinventedby?,毕升,Doyouknowwhenitwasinvented?,Whowasitinventedby?,1aLookatthethingsbelow.Inwhatorderdoyouthinktheywereinvented?Discussthemwithyourgroup.Thennumberthem【1-4】(1=first,4=last).,IthinktheTVwasinventedbeforethecar.,Well,IthinktheTVwasinventedafterthecar.,语法重点一,IthinktheTVwasinventedbeforethecar.我认为电视比汽车发明得早。这是一个主从复合句，think后面跟了一个宾语从句。因为主句是一般现在时态，从句根据句意用了一般过去时态。（1）wasinvented意为“被发明”，此结构为一般过去时的被动语态。一般过去时的被动语态的结构为“was/were+及物动词的过去分词”。如：Thesetreeswereplantedlastyear.Thecarwasboughtyesterday.,（2）invent做动词，意为“发明，创造”，指发明以前没有的新东西。当物做主语时，常用被动语态。invention名词，意为“发明物”；inventor名词，意为“发明家，发明者”。如：Edison,agreatinventor,inventedmanygreatinventionsduringhislife.Manyinventionhavebeeninventedlastyear.,1b.Listenandmatchtheinventionswiththeyears.,_1876_1885_1927_1976,1c.StudentB,coverthedates.StudentA,askStudentBwhenthethingsinthepicturein1bwereinvented.Thenchangerolesandpracticeagain.,Whenwasthetelephoneinvented?,Ithinkitwasinventedin1876.,_shoeswithspecialheels,_shoeswithlights,_hotice-creamscoop,runsonelectricity,2b.Listenagainandcompletethechartbelow.,2c.Makeconversationsusingtheinformationin2b.,Whataretheyusedfor?,Theyreusedfor,语法重点二,Whataretheyusedfor?它们是用来做什么的？beusedforsth./doingsth.意为“被用来做某事”，表示用途或目的，后接名词或动名词，相当于beusedtodosth。如：Clothesareusedforkeeping(=tokeep)warm.Woodcanbeusedforbuilding(=tobuild)houses.Thestickisusedtowriteontheblackboard.,语法重点二,辨析：beusedfor，beusedas与beusedby,(2)beusedas被用作,as是介词，意为“作为”，其后一般接名词，强调使用的工具或手段。如:Theboxisusedasatablebymymother.(3)beusedby被使用,by是介词，意为“被,由”，后接动作的执行者。如:Thetoolsareusedbytheworkersinthefactory.,HeyRoy,thesubjectformyschoolprojectis“Smallinventionsthatchangedtheworld.”Canyouhelpmethinkofaninvention?,Mypleasure!LetmethinkhmmIknow!Thezipper!,Thezipper?Isitreallysuchagreatinvention?,Thinkabouthowoftenitsusedinourdailylives.Youcanseezippersondresses,trousers,shoes,bagsalmosteverywhere!,Well,youdoseemhaveapoint,Ofcourse!IthoughtaboutitbecauseIsawawebsitelastweek.,Thepioneersofdifferentinventionswerelistedthere.,Forexample,itmentionedthatthezipperwasinventedbyWhitcombJudsonin1893.,Butatthattime,itwasntusedwidely.,Really?Sowhendiditbecomepopular?,Around1917.,语法重点三,Thepioneersofdifferentinventionswerelistedthere.不同的发明的先驱者都列在这里。pioneer作名词，意为“先锋；开拓者；先驱”。如：HewasapioneerintheuseofX-rays.Iseeeverybodyasapioneeroutthere.作动词，意为“开辟；首倡”。如：Shepioneeredtheuseofthedrug.,小结训练,1.Thetelephone_byawell-knownscientist,Edison.A.inventedB.inventingC.wasinvented2.Englishisused_asecondlanguage_peopleinmanycountries.A.as,byB.for,byC.as,for3.-Whatisthebottleusedfor?-Itisused_holdthew