英语被动语态PPT

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1、PassiveVoice语法复习之第十二讲:被动语态Disscusion3:theactivevoice主动语态&thepassivevoice被动语态如何把主动语态句子变成被动语态句子?哪三个部分要变？怎么变？1.把原句的宾语改为主语。2.把原句的谓语动词改为被动语态结构(be+p.p.)。3.把原句的主语改为by+宾语（用宾格）,可省略。e.g.WestudyEnglish.Englishisstudied(byus).一.何时使用被动语态1.不知道谁是动作的执行者或没有必要知道。2.需要强调动作的

2、承受者时3.为了使语气婉转，避免提及自己或对方而使用被动语态，或由于修饰的需要，使用被动语态，使句子得以更好的安排。被动语态的复习要点：1.被动语态的各种时态的结构；2.变被动语态注意几点；3.不用被动语态的情况；4.用于被动语态的特殊句型。各种时态的被动语态构成一般现在时：一般过去时：情态动词：一般将来时：现在进行时：现在完成时：过去进行时：过去将来时：S+am/is/are+P.PS+was/were+P.P.S+can/may/must/should+be+P.P.S+will/shall+be+

3、P.P.S+am/is/are+being+P.P.S+have/has+been+P.P.S+was/were+being+P.P.S+would/should+be+P.P.二、常见语态转换（一）一般现在时和一般过去时的被动语态。1.Lucyboughtsomefruit.Somefruit________________Lucy.2.UncleWangwaterstheflowerseveryday.Theflowers______________UncleWangeveryday.3.Didth

4、eybuildthebridgein1998?____thebridge_____in1998?4.WhendidLuXunwritethesebooks?When_____thesebooks___________LuXun?5.Thefarmersdon’tgrowapplesonthefarm.Apples__________onthefarm.6.Theydidn’tcleantheclassroomyesterday.Theclassroom_______________yesterday.小

5、结：1、被动语态的转换，在be+过去分词中，确定_____是关键，_______永不变。2、Be的时态由_______________确定；be的单/复数由____________确定。3、问句提前__________;否定________后加not.wasboughtbyarewateredbyWasbuiltwerewrittenbyaren’tgrownwasn’tcleanedbe形过去分词主动时态被动主语be动词be(二）一般现在时带情态动词的被动语态。1.Youcandotheworkall

6、byyourself.Thework_______________allbyyourself.2.Wemustplantmoretrees.Moretrees__________________.3.Weshoulddigalargehole.Alargehole______________.4.Canweputourbikeshere?_____ourbikes_________here?5.Youmustn’tthrowrubbishhere.Rubbish_________________here

7、.6.Wecan’tseemanystars.Manystars___________________.小结：1.含情态动词的被动结构：______________________.2.疑问句提前_____________;否定句：___________+not.canbedonemustbeplantedshouldbedugCanbeputmustn’tbethrowncan’tbeseen情态动词+be+过去分词情态动词情态动词Exercise：1.Thethiefwasseen________a

8、way.A.runB.torunC.ranD.runs2.Teachersmadeus______intheclassroom,soweweremade______ourhomework.stay,doB.tostay,doC.tostay,todoD.stay,todo3.Thebook__________.A.sellsgoodB.sellswellC.issoldgoodD.issoldwell4.Greatchanges___int