被动语态基本用法当句子的主语是动作的执行者时，谓语的形式是主动语态。当句子的主语是动作的承受者时，谓语要用被动语态。被动语态由助动词be+过去分词构成，时态通过be表现出来。被动语态基本用法当句子的主语是动作的执行者时，谓语的形式是主动语态。当句子的主语是动作的承受者时，谓语要用被动语态。被动语态由助动词be+过去分词构成，时态通过be表现出来。be+Vp.p(动词的过去分词）1)be动词可以随时态人称的变化而变化am/is/are+V(过去分词）was/were+V(过去分词）willbe+V(过去分词）情态动词+be+V(过去分词）1.规则动词的过去分词：1)一般情况在动词原形后加-edwatch---watched2)以不发音e结尾的加-dpractice---practiced3)以辅音加y结尾的，去y变i加-edstudy---studied4)以重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加-edstop---stopped2.不规则动词的过去分词：amisarebeenhavehashaddodonewritewrittengogoneHeplantstreesinspring.主谓宾(受动者)Treesareplantedbyhim改为被动语态inspring.主动语态变被动语态口诀：宾语提前主语变，原主变宾by后见，时态人称be关键。Tomwillcleantheroomtomorrow.主谓宾(受动者)TheroomwillbecleanedbyTomtomorrow.Hisbrotherwashesbowlseveryday.主谓宾(受动者)Bowlsarewashedbyhisbrothereveryday.1.Theymakeshoesinthatfactory.主语+及物动词+宾语Shoesaremade(bythem)inthatfactory.一般现在时：S(主语）+am/is/are+过去分词2.Theyboughttencomputerslastterm．Tencomputerswerebought(bythem)lastterm.一般过去时：S+was/were+过去分词3．AmycantakegoodcareofGina．GinacanbetakengoodcareofbyAmy.情态动词：S+can/may/must/should+be+过去分词各种时态的被动语态构成1）一般现在时：Youareinvitedtodothis.2）一般过去时：Thestorywastoldbyher.3）一般将来时：Theproblemwillbediscussedtomorrow.4)情态动词：Therubbishcanbeputintothedustbinoverthere.时态主动语态被动语态一般现在时V(原形)/V(e)sam/is/are+Vpp一般过去时V-ed/madewas/were+Vpp一般将来时will+V(原形)will+be+Vpp含情态动词情态动词+V(原形)情态动词+be+Vpp1.Peopleuseknivesforcuttingthings.Knives____________forcuttingthings.2.Thestudentscleanthewindowsoftheirclassroomtwiceamonth.Thewindowsoftheirclassroom_____________twiceamonth.(变被动语态）3.Ifoundtheticketonthefloor.________________________onthefloor.4.Itoldhertoreturnthebookintime.She_____________toreturnthebookintime.4.Theywillfinishtheworkintendays.Theworkwillbefinished(bythem)intendays.一般将来时：S+will+be+过去分词5.Someworkersarepaintingtheroomsnow．Theroomsarebeingpaintedbysomeworkersnow.现在进行时：S+am/is/are+being+过去分词6．Wehavemadetwentymorekeys．Twentymorekeyshavebeenmadebyus.现在完成时：S+have/has+been+过去分词7．Iwasdoingmyhomeworkat8:00lastnight．Myhomeworkwasbeingdone(byme)at8:00lastnight.过去进行时：S+was/were+being+过去分词
