精选优质文档-倾情为你奉上Unit21、 被动语态基础篇1. 被动语态的构成： be + 过去分词2. 时态通过助动词be变化体现：时态 be 过去分词done为例例句一般现在时am / is / aredoneEnglish is spoken in many countries.一般过去时was / weredoneSome TV sets for sale in the department store were stolen last night. 一般将来时shall / will + bedoneHe wont be allowed, by his father, to marry Larra. 过去将来时would / should + bedoneThey would be sent to the army when theyFinished the training.现在进行时am / is / are + beingdo
