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.