精品课件-初中被动语态课件.ppt

思考4: 把主动语态变为被动语态 I saw him fall off the tree. He ____ ____ ____ fall off the tree. 动词不定时只变sb.to动词不变 Ask sb to do sth 变为sb be asked todosth 短语动词转换为被动态时，通常被看作是一个动词，后面的介词或副词不能拆开或省略。 They looked after the children →The children were well looked after. We has put off the meeting till next week. → The meeting has been put off till next week. 注意: 约翰打开了收音机。 John turned on the radio. The radio was turned on. 奶奶照看我姐姐。 Grandma takes care of my sister. My sister is taken care of by Grandma. 注：千万不要遗漏介词或副词。 We must speak to old people politely. Old people must be spoken to politely. [9]. Children should ___. A. take good care of B. be taken good care C. be taken good care of 固定短语的被动不要丢掉后面的介词或副词 注意: 约翰打开了收音机。 John turned on the radio. The radio was turned on. 奶奶照看我姐姐。 Grandma takes care of my sister. My sister is taken care of by Grandma. 注：千万不要遗漏介词或副词。 We must speak to old people politely. Old people must be spoken to politely. [10]. Your desk ___. A. needs repair B. needs repairing C. needs to repair need, allow 可以用-ing形式表示 被动 need to be done = need doing * 语态是动词的一种形式，表示主语和动词之间的关系。英语动词有两种语态：主动语态和被动语态。主动语态动词的主语是动作的执行者，而被动语态动词的主语是动作的承受者。被动语态是动词的一种特殊形式，一般说来，只有需要动作对象的及物动词才有被动语态。  英语语态 被动语态的构成 worked opened closed seen taught asked work close open ask see teach e.g. 由助动词be + 及物动词的过去分词（V-ed）构成。助动词be有人称、数和时态的变化。 The flowers What does she do every day? every day. are watered by her She waters the flowers every day. 主 谓 宾 后面能接宾语的动词才有被动语态 We speak English. 主语 谓语 宾语 English is spoken by us. 主语 谓语 宾语 宾变主,主变宾,前加by 动变被,看清be, 结构分别be+ pp 主动语态 被动语态 主动变被动的方法: She waters the flowers every day. 主 谓 宾 The flowers are watered by her every day. ① ② ③ ④ 总结: 抄下来 其他 → 主语 → 谓语 → 宾语 → 被动语态 主动语态 主语 be+ P.P by +宾语 be + P.P. 被动语态的基本结构: 有各种时态的变化 考点一: 主变被解题步骤: 1. 找宾语 -