人教版九年级Unit9课件.ppt

人类的每一次改革都是社会前进的步伐，每一次思想的升华都越来越接近文明。发明使人类由黑暗走向光明。正因为如此，社会离不开发明。让我们一起走向发明的前源吧。,Whenwasitinvented?,发明使人类由黑暗走向光明。,神七飞天,Unit9,Whenwasitinvented?,Explain,Aims,Exercise,Practice,Listening,Whenwasitinvented?,课时目标:1.学会运用一般过去时的被动语态。2.了解一些伟大发明的历史。3.训练我们的口语和听力能力。,lightbulb,invention,Edison,inventor,Edisoninventedthelightbulb.,ThelightbulbwasinventedbyEdison.,Bellinventedthetelephone.,_wasinventedby_.,Thetelephone,Bell,KarlBenzinventedthecar.,_wasinventedby_.,Thecar,KarlBenz,1,2,3,4,5,Listening(1b:P68),1876,1885,1927,1971,1976,A:Whowasthe_inventedby?B:Itwasinventedby_.,Revision,CarlBenz,Bell,Revision,A:Whowerethe_inventedby?B:Theywereinventedby_.,Edison,A:Whenwasthe_invented?B:Ithinkitwasinventedin_.,Pairwork(1c:P68),1976,1885,1876,1927,(Achant),Inventions,inventions,inventionsLetstalkaboutinventions!Thecomputer,computer,computer,Whenwasitinvented?Thecomputer,computer,computer,wasinventedin1976.Thecalculator,calculator,calculatorWhenwasitinvented?Thecalculator,calculator,calculatorwasinventedin1971.,Thetelevision,television,televisionWhenwasitinvented?Thetelevision,television,televisionwasinventedin1927.Themotorcar,motorcar,motorcarWhenwasitinvented?Themotorcar,motorcar,motorcar,wasinventedin1885.Thetelephone,telephone,telephoneWhenwasitinvented?Thetelephone,telephone,telephonewasinventedin1876.,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,Thepassivevoice.,被动语态,被动语态的用法:,不知动作执行者时,常用被动语态.eg.Mybikewasstolenyesterday.ThiscarismadeinAmerican.2.不必要说出动作执行者时,常用.eg.Romewasnotbuiltinaday.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,主动语态变为被动语态的步骤:,把原主动句中的宾语转换为被动语态的主语.2.把动词改为被动形式,即“be+过去分词”.注意be动词要按新的主语的人称和数进行变化,时态要和原来的主动语态的时态保持一致.3.原来主动语态句中的主语,如果需要,就放在by后面以它的宾格形式出现.如果没有必要就可以省略.其他的成分(定语,状语)不变,句式也不能变.,Thepassivevoice.,被动语态,主动语态变被动语态的结构图:,Bellinventedthetelephonein1876.ThetelephonewasinventedbyBellin1876.,主语,谓语动词过去时,宾语,时间状语,主语,谓语动词的过去分词,宾语,时间状语,Thepassivevoice.,被动语态,主动语态改被动语态:,Bell,invented,thetelephone,in1876.,was,by,用所给动词的正确形式填空：,1)Thebike_(fix)upbyXiaoMingyesterday.2)Sunglasses_(use)forprotectingpeopleseyes.3)Apicture_(put)upontheblackboard.4)French_(speak)inFrance.5)Teenagersshould_(allow)tochoosetheirownclothes.,wasfixed,areused,isput,isspoken,beallowed,就下列句子的画线部分提问：,1.Q:_A:Thestovewasinventedin1896.2.Q:_A:TheWrightbrothersinventedtheplane.3.Q:_A:Thewashingmachineisusedforwashingclothes.,Whenwasthestoveinvented?,Whoinventedtheplane?,Whatisthewashingmachineusedfor?,就下列句子的画线部分提问：,4.Q:_A:Theheli