主动语态变成被动语态

　　1、从句子意义上说，就是重新找出“什么事物”是“被完成”的。

　　主动语态：人们说英语。People speak English in many countries.被动语态：英语被说。English is spoken in many countries..主动语态：我们造这座桥。We built this bridge last year.被动语态：这座桥被建造。This bridge was built last year.

　　2、从语法的角度说，把原句的宾语改成主语。主动语态：小王邀请你(宾语)Xiao Liu has invited you to a lunch party.被动语态：你(宾语)被邀请。You has been invited to a lunch party by Xiao Wang.主动语态：你不准带走杂志(宾语)You must not take these magazines out of the reading-room.被动语态：杂志(宾语)不准被带走.These magazines must not be taken out of the reading room.主动语态：他们授给他(宾语)一枚奖章(宾语).They gave him a medal for his wonderful work.被动语态：他(宾语)被授予一枚奖章.He was given a medal for his wonderful work.被动语态：一枚奖章(宾语)被授给了他.A medal was given to him for his wonderful work.

　　语态转换时所注意的问题

　　1. 把主动语态变为被动语态，其谓语动词的时态要与原句时态保持一致，其谓语动词的数要与新主语保持一致。We have bought a new computer.A new computer has been bought.A new computer have been bought. (错误)

　　2. 含有双宾语的主动句变被动句时，可分别将其中的一个宾语变为主语，另一个不动，一般变间接宾语为主语时比较多My uncle gave me a present on my birthday.I was given a present on my birthday.如果把直接宾语(指物)改为主语，则在间接宾语(指人)前加适当的介词，如上句还可以说：A present was given to me yesterday.注意：1.一般在下列动词后，常在间接宾语前用介词 to，如：bring, give, hand, lend, offer, pass, pay, promise, sell, show, take, teach, tell 等。(1) The book was showed to the class.(2) My bike was lent to her.2.一般在下列动词后，间接宾语前用介词 for, 如：build, buy, cook, cut, choose, do, fetch, find, fix, get, keep, make, order, paint, play, sing 等。(1) A new skirt was made for me.(2) The meat was cooked for us.(3) Some country music was played for us.

　　3. 由动词+ 介词或副词构成的短语动词，要把它们作为整体看，即把它们看成一个及物动词，介词或副词不可拆开或漏掉。这类动词有：不及物动词+ 介词，如: agree to, ask for, laugh at, operated on, listen to, look after, think of, talk about 等。The patient is being operated on. The problem is solved. It needn't be talked about.及物动词+ 副词：如：bring about, carry out, find out, give up, hand in, make out, pass on, point out, put away, put off, think over, turn down, work out, turn out 等。His request was turned down.The sports meet will be put off because of the bad weather