被动语态被动语态的基本用法：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。何时用被动语态1.不知道动作的执行者是谁Mycupwasbrokenthismorning.2.没必要知道动作的执行者是谁ThiskindofglassismadeinChina.3.强调动作的执行者是谁YourcupwasbrokenbyLiHua.三、由主动变被动的方法s.(主格）+v.+o.（宾格）→o.（主格）+be+p.p.+{by+s.(宾格)}Hisbrotherwashesbowlseveryday.1.Theymakeshoesinthatfactory.主语+及物动词+宾语1)TheyplayfootballonSunday.2)Lucydoesthehomeworkintheevening.3)Theyoftenusecomputersinclass.4)WemakethesemachinesinBeilun.5)PeoplespeakEnglishasthefirstlanguageinUK.答案：Helookedafterthelittlebabyyesterday.2.Theyboughttencomputerslastterm．将下列句子改成被动语态：1)Theybuiltthetallbuildinglastyear.2)Hetookgoodcareofhislittlebrotheryesterday.3)Wecleanedourclassroomjustnow.4)Theyusedthisroomforresting.5)Theyplantedmanytreesyearsago.答案：Tomwillcleantheroomtomorrow.3.Theywillfinishtheworkintendays.将下列句子改为被动语态：1).Wewillhaveasportsmeetingnextweek.2).Childrenwilltakesomephotostheretomorrow.3).Theheadmasterwillgiveatalksoon.4).Theywillgrowdifferentkindsofvegetables.5).UncleWangwillmendtheTVsettomorrow.答案：4．AmycantakegoodcareofGina．变主动语态为被动语态：1)Hecantakecareofthebaby.2)Lucymaydrawthepictures.3)Youmustturnoffthelights.4)TheyshouldlearnEnglishwell.5)Jimcoulddoityesterday.答案：下列时态的被动语态构成1.Lucyiswateringthetrees.2.Theboywasmendinghisbike.3.Wehavefinishedourcompositions.答案：1.ThetreesarebeingwateredbyLucy.2.Hisbikewasbeingmendedbytheboy.3.Ourcompositionshavebeenfinished.Someworkersarepaintingtheroomsnow．Iwasdoingmyhomeworkat8:00lastnight．Wehavemadetwentymorekeys．各种时态的被动语态构成主动变被动：1)Wecleanourclassroomeveryday.Ourclassroomiscleaned(byus)everyday.2)Heboughtthebookyesterday.Thebookwasboughtyesterday.3)Theyarebuildingabridgeoverthere.Abuildingisbeingbuiltoverthere.4)Ihavefinishedmyhomework.Myhomeworkhasbeenfinished.5)Jackwilltranslatethenovel.Thenovelwillbetranslated.7)Youcanwashyourclothesnextweek.Yourclothescanbewashednextweek.练习：将下列句子变为被动句:1.LiLeilistenstohisfathercarefully.2.Themotherlookedaftertheb