Unit 3 Discovering Useful Structures 现在完成时被动语态课件-2022-2023学年高中英语人教版（2019）必修第二册

Unit 3 The Internet Discovering Useful Structures 现在完成时被动语态 To learn the present perfect passive voice To use the present perfect passive voice to do some exercises and talk about something has been done To read a poem and learn to write your own poem 现在完成时 用法：1.表示发生在过去且已经完成的动作对现在造成的影响或结果 2.表示动作从过去延续到现在并有可能继续延续下去 基本结构：主语+have/has+done +其他 The countryside has changed a lot in the past few years. We have seen that film before.之前我们已经看过那部电影了。 现在 过去 将来 ﹏ 3 Read the pairs of sentences. Underline and compare the different verb forms. Jan’s life has been greatly improved by the Internet. The Internet has greatly improved Jan’s life. Much has been written about the wonders of the World Wide Web. People have written much about the wonders of the World Wide Web. 4 现在完成时与现在完成时被动语态的动词形式 找出下面句子的谓语结构，哪些是主动？哪些是被动？ Jan’s life has been greatly improved by the Internet. The Internet has greatly improved Jan’s life. People have written much about the wonders of the World Wide Web. Much has been written about the wonders of the World Wide Web. 被动 主动 主动 被动 现在完成时谓语结构 主动 被动 have/has done have/has been done ......已经被...... 5 主语 + have/ has + V-过去分词(done) 助动词,无意义 一、现在完成时的结构 Winter has already come . 一、用法： 1、表示发生在过去,到现在已经完成的动作对现在的影响。表示动作从过去延续到现在并有可能继续延续下去 2、动词和被修饰主语构成被动关系。 二、构成： 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? 三、解题步骤 1.根据句意确定时态 2.确定主被动 3.定谓have/has 现在完成时的被动语态 现在完成时的被动语态有两种情况： 1) 表过去开始的被动动作一直持续到现在，常连用的时间状语有：for+段时间，since+时间状语(从句)，these days, so far, up to now, in the last/ past few years等。 eg This class have been taught by Mr. Brown for two years. His Chinese has been improved a lot since he came to China. Rowling’s novels have been translated into many foreign languages so far. 2) 表某被动动作对现在造成的影响或结果，常与already, yet, just, ever, never, recently等连用。 eg The bike has not been repaired yet. I have already been introduced to Mr. Smith. 注意：有些动词没有被动