语态是动词的一种形式，英语有两种语态：主动语态和被动语态。主动语态表示主语是动作的执行者，而被动语态表示主语是动作的承受者。1被动语态的构成:1)简单句的主动变被动:把句子(jùzi)的宾语变成句子(jùzi)的主语.eg:Mybrotherwashedthedishes.ThedisheswerewashedbymybrotherHepressedthebutton.Thebuttonwaspressedbyhim.2)动词后接双宾语变被动有两种变法:(1)将间接宾语放句首(2)将直接(zhíjiē)宾语放句首,在间接宾语前加to,for等介词.eg:Igivemymothersomemoney.Mymotherwasgivensomemoney.Somemoneywasgiventomymother.eg:Iboughtheranewskirt.Shewasboughtanewskirt.Anewskirtwasboughtforher.3)动词(dòngcí)后接复合宾语变被动,只将宾语改为主语,宾补则不能改为主语.eg:TheyelectedBushpresident.Bushwaselectedpresidentbythem.eg:Theteachermadewhathesaidarule.Whathesaidwasmadearule.注意:若宾补部分为省略to的不定式,则要求在变被动的时候把to还原.常会用到这样宾补的动词(dòngcí)有:hear,see,make.eg:Iheardhersing.Shewasheardtosing.eg:Theboymadethelittlegirlcry.Thelittlegirlwasmadetocrybytheboy.4)“动词+名词+介词”这样结构的短语,例如:takecareof,makeuseof,payattentionto,makecontributionsto,makepreparationsfor…在句子中做谓语(wèiyǔ)时,变被动有两种方式:(1)变短语中介词后的宾语为主语eg:Everyoneshouldmakegooduseofwater.Watershouldbemadegooduseof.eg:Sheistakingcareofthebaby.Thebabyisbeingtakencareof.eg:Hemadecontributionstohismotherland.Hismotherlandwasmadecontributionsto.(2)变短语(duǎnyǔ)中的名词为主语eg:Everyoneshouldmakegooduseofwater.Gooduseshouldbemadeof.eg:Sheistakingcareofthebaby.Careisbeingtakenof.eg:Hemadecontributionstohismotherland.Contributionsweremadetohismotherland.5)句型(jùxínꞬ)“itbedonethat+从句”中常见的动词done有：said,believed,known,reported,supposed,announced等.该句型(jùxínꞬ)=“Asbedone,+从句”eg:Itisknowntoallthatpaperwasfirstmadeinchina.=Asisknowntoall,paperwasfirstmadeinchina.2.不能用于被动语态的动词和短语(1)在英语中，不及物动词不能用于被动语态，但有些不及物动词（包括短语）容易引起误用。如：appear,belongto,die,escape,fall,happen,last,remain,succeed,occur,cometrue,takeplace,consistof。(2)某些表示状态(zhuàngtài)或特征的及物动词，如：become,contain,cost,fit,have,resemble,suit,own也没有被动语态。(3)半系动词无被动:look,seem,sound,smell,feel,prove,turnoutYourtheorysoundsquitereasonable.3.主动表被动(1)有些及物动词或短语(duǎnyǔ)如:cost,hold,last,belongto等,要用主动表达被动.(2)有些及物动词，如wash,read,sell,write,weigh,translate,clean,cook,open,close,lock,等，在常与副