被动语态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：Heplantstreesinspring.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.Hisbrotherwashesbowlseveryday.1.Theymakeshoesinthatfactory.主语+及物动词+宾语2.Theyboughttencomputerslastterm．3．AmycantakegoodcareofGina．4.Theywillfinishtheworkintendays.5.Someworkersarepaintingtheroomsnow．6．Wehavemadetwentymorekeys．7．Iwasdoingmyhomeworkat8:00lastnight．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.时态各种时态的被动语态构成何时使用被动语态呢？一、行为主体不明确，不必说出或者无法说出动作的执行者时。例如：Footballisplayedallovertheworld．二、不易找到或根本就不可能找到动作的执行者时。例如：Mybikewasstolen．我的自行车被盗了。三、汉语中含有“据说”、“据悉”、“有人说”、“大家说”等时。例如：Itissaidthatonedayheclimbedtothetopofahouseand……ItwasreportedthathermotherdiedofSARS.众所周知……Itiswellknownthat…据推测说……Itissupposedthat…四、汉语中含有“被”、“由”等词时。例如：TinaisaskedtocomebyPaul．Tina是被Paul叫来的。五、某些句子习惯上用被动语态。例如：HewasborninOctober，1989．1.Peopleuseknivesforcuttingthings.Knives____________forcuttingthings.2.Thestudentscleanthewindowsoftheirclassroomtwiceamonth.Thewindowsoftheirclassroom_____________twiceamonth.3.Ifoundtheticketonthefloor.________________________onthefloor.4.Itoldhertoreturnthebookintime.She_____________toreturnthebookintime.5.Hisdoctormadehimhaveonlytwomealsaday.He___________________________onlytwomealsaday.6.Nowpeoplecanusecomputerstohelpthem.Nowcomputers___________________tohelpthem.7.Didyouplantmanytreesatthistimelastyear?___________________________atthistimelasttime?8.Mustwefinishourworktoday?_______ourwork_____________today?9.Theforeignfriendsgaveussomewonderfulstamps.1)____________________somewonderfulstamps.2)Somewonderfulstamps_____________________________.10.TheteacheraskedTomtoturnonthecomputer.Tom_______________toturnonthecomputer.