九年级英语Unit_3被动语态课件.ppt

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1、被动语态1.Teenagersshouldbeallowedtochoosetheirownclothes.2.Englishisspokenbymanypeople.4.Lucky52iswatchedonTVbymanypeople.3.Weareinvitedtothepartybyourfriends.5.Riceisplanted(种植)inSouthChina.6.Heissaidagoodboy.语态：表示主语和谓语动词之间的关系。英语有两种语态，即主动语态和被动语态。主动语态：表示主

2、语是动作的执行者。被动语态：表示主语是动作的承受者。如：ManystudentsstudyEnglish.(主动语态)Englishisstudiedbymanystudents.(被动语态)语态如：Thedeskismadeofwood.Thedesksaremadeofwood.（助动词be有人称、数的变化。）被动语态的结构be+及物动词的过去分词不同的时态有不同的被动语态结构1.一般现在时的被动语态结构：bymanystudents.主动语态变被动语态的方法1.Manystudentsstud

3、yEnglish.Englishisstudied2.Theymakeshoesinthatfactory.Shoesaremadebytheminthatfactory.1.找宾语----即动作的承受者Theymakeshoesinthatfactory.Shoes2.判断宾语的单复数----即be动词的单复数.aremade3.判断动词的时态----即be动词的时态.4.修改谓语的形式----即原句动词改为过去分词5.修改原句的主语----即by+宾语（原主语）.bythem.主变被解题步骤主变

4、宾,宾变主,谓动bedone时不变,人称、数、格随着变主动语态变被动语态的方法1.把主动语态的宾语变为被动语态的主语。2.把主动语态的谓语变为被动语态的谓语。3.把主动语态的主语变为被动语态的by短语。（①by短语可以省。②by短语后跟代词的宾格。）bytheteacher.3.Theteacheroftenaskshimquestions.HeisaskedquestionsTheyplayfootballonSunday.Lucydoesthehomeworkintheevening.Theyo

5、ftenusecomputersinclass.WemakethesemachinesinBeijing.FootballisplayedbythemonSunday.ThehomeworkisdonebyLucyintheevening.Computersareoftenusedbytheminclass.ThesemachinesaremadeinBeijing.Practice肯定句：主语＋be+过去分词＋(by~)否定句：主语＋benot＋过去分词＋(by~)一般疑问句：Be＋主语＋过去分词

6、＋(by~)?特殊疑问句：疑问词＋be＋主语＋过去分词＋(by~)bymanystudents.Englishisstudiedbymanystudents.Englishisnotstudied式IsEnglishstudiedbymanystudents?WhoisEnglishstudiedby?ThehomeworkisdonebyLucyintheevening.Computersareoftenusedbytheminclass.ThesemachinesaremadeinBeijing

7、.FootballisplayedbythemonSunday.Practice1.Theyboughttencomputerslastterm．bythemlastterm.2.一般过去时的被动语态结构：was/were+过去分词lastyear.2.Weplantedmanytreeslastyear.ManytreeswereplantedTencomputerswereboughtTheybuiltthetallbuildinglastyear.Hetookgoodcareofhislitt

8、lebrotheryesterday.Wecleanedourclassroomjustnow.Theyusedthisroomforresting.Thetallbuildingwasbuiltbythemlastyear.Hislittlebrotherwastakengoodcareofbyhimyesterday.Ourclassroomwascleanedbyusjustnow.Thisroomwasusedforrestingbythem.3.一般将来时的