(
课件网) Unit 3 The Internet Discovering useful structures Active and passive voices 单击输入您的封面副标题 Lead-in 被动语态复习 一、什么是语态？ 语态是英语动词的一种表现形式，用来说明_____和_____之间的关系。 二、语态的种类：_____和_____ 主语 谓语动词 主动 被动 You hit me! I was hit / beaten. 现在完成时的结构: S + have/ has + V-过去分词（done） 被动语态的结构: be+ V-过去分词（done） Summary： 现在完成时的被动语态肯定式就是： 主语+have/has+been+ done 人教版2019版 高一 unit3 The Internet grammar【优秀课件】 人教版2019版 高一 unit3 The Internet grammar【优秀课件】 二、现在完成时的被动语态结构 结构： 肯定式：have/has + been + done 否定式：have/has + not + been +done 一般疑问句：Have/Has +主语+ been+done 特殊疑问句：疑问词+have/has ＋主语+been+ done 肯定形式 His homework has been finished. 否定形式 一般疑问句 特殊疑问句 Practice 现在完成时的被动语态 His homework has not been finished. Has his homework been finished yet How long has his homework been finished Tips: 常与现在完成时连用的时间状语 already 已经 yet 已经 recently/lately 最近 since then 从那时起 ever since 自那以来 ever 曾经 so far 迄今为止 for a long time 很长一段时间 by now 到现在为止 in recent years 在最近几年里 in/during/over the past/last years 在过去的几年里 for+时间段 三、现在完成时的被动语态的三种用法： 1、表某被动动作已经完成，对现在造成的影响或结果。常与already, yet, just, ever, never, recently等副词及时间状语so far, by now, up till now, before连用。 e.g The bike has not been repaired yet. I have already been introduced to Mr. Smith. 2) 表过去开始的被动动作一直持续到现在，并有可能持续下去。常连用的时间状语有：for+一段时间，since+时间状语(从句)。 e.g This class have been taught by Mr. Brown for two years. His Chinese has been improved a lot since he came to China. 3） 用在时间或条件状语从句中，表示将来某时已完成的动作，也就是用现在完成时的被动语态替代将来完成时的被动语态。 e.g You can go home as soon as your task has been finished. 主动语态变被动语态的原则 “三变” 例：They are building nine parks. 原句主语 by的宾语 宾语 主语 谓语由主动 被动 “三不变” 原句意思不变 原句时态不变 原句主谓宾以外成分不变 Nine parks _____ by them. are being built 1. 非延续性动词 由borrow，finish，begin，start，buy，marry，open，join, die等词构成的现在完成时的被动语态,不能与表示段时间的状语，如for four days, how long等连用，而要改换动词或者是时态。 V X 注意点 判断正误: * How long has this book been bought （ ） * How long ago was this book bought （ ） 判断正误: *The patient has been taken good care. （ ） *The patient has been taken good care of. （ ） T F 2. 动词短语 短语动词不能分割，而且不能省略短语动词中的介词或副词。 主动: I have asked her to help you. 被动: She has been asked to help you. 3. 带复合宾语的动词 带复合宾语的动词变被动语态时, 只能将宾语变为主语, 原来的宾补保留不动, 改成主语补足语。 主动: I have given him the key. 被动: He has been given the key. 被动: The key has been given to him. 3. 带双宾语的动词 如give, send, bring, ta ... ...
