1、一、概念被动语态表示主语是动作的承受者。二、构成助动词be+及物动词的过去分词三、用法1.讲话者不知道动作的执行者或不必说出动作的执行者。My bike was stolen was stolen last night.2.借助被动的动作突出动作的承受者。The bike was knocked down was knocked down by a naughty boy.3.习惯用法。这类常见的词有born,determine,devote,seat,dress等。He was born was born in China in 2014.We must be dressed be dres
2、sed in uniform at school.四、形式1.一般现在时：am/is/are+done am/is/are+done The classroom is cleaned is cleaned by them every day.Such songs areare usually sungsung by boys.2、一般过去时：was/were+donewas/were+doneThe window was broken was broken by Tom two hours ago.WereWere many trees plantedplanted on the hill y
3、esterday?3、一般将来时：will/be will/be going to/shall going to/shall+be+be donedoneThe problem will be discussed will be discussed tomorrow.When shallshall we be givenbe given a lecture on the Internet?4、现在进行时：am/is/are+being am/is/are+being donedoneThe question is being discussed is being discussed in th
4、e meeting room at the moment.A hospital is being built is being built in the center of the town.5、过去进行时：was/were+being was/were+being donedoneThe classroom was being cleaned was being cleaned this time yesterday.The teaching plan was being discussed was being discussed at that time.6、现在完成时：have/has+
5、been have/has+been donedoneThe classroom looks tidy.It has been cleanedhas been cleaned.Many foreign films have been shown have been shown on TV since last month.The radio has not been turned on has not been turned on yet.7、过去完成时：had had been been+done+doneHe said that the work had been finishedhad
6、been finished.His newly written novel had been translatedhad been translated into English by the end of last month.8、含情态动词：must/may/might/can/could+be must/may/might/can/could+be donedoneThe problem must be solvedmust be solved soon.The work can be finishedbe finished on time.五、主动表被动的情形1.表示感官意义的连系动词
7、如smell，feel，taste，look，sound等在句子中常表达被动含义。Good medicine tastestastes bitter.Our school lookslooks more beautiful than before.2.不定式修饰作表语和宾语补足语的形容词时，如difficult,easy,comfortable,convenient,hard等。Those signs are hard to see to see clearly.I find this question difficult to answerto answer.3.need,require（需
8、要）,deserve（应得，值得），be worth（值得）等词后接doing，此时用主动表被动。The book is worth readingis worth reading.Your hair needs cuttingneeds cutting.4.当句子主语（一般是物）具有某些内在的特征或性质时，如drive,lock,sell等，常用主动形式表示被动含义。The door wont lockwont lock.（指门本身有毛病）The door wont be locked.（指不会有人来锁门）5.表示开始、结束、运动的动词，如begin,finish,start,open,cl
9、ose,stop,end,run,move等。The shop closescloses at 6 oclock p.m.every day.The lesson will beginbegin at 8 oclock.6.有些不及物动词与副词(well,badly,easily,smoothly(平稳地；平滑得)等)连用时，可以用主动形式表示被动含义。常见的有cut,sell,read,write,cook,wash,clean,burn等。Meat cuts easilycuts easily.His novel sells wellsells well.7.在be to do结构中的一些不定式用主动表被动。Youaretoblamearetoblamefortheaccident.Thehouseistoletistolet.
