(
课件网) Unit 3 The Internet Discovering Useful Structures 现在完成时的被动语态 The present perfect passive voice 现在完成时结构 现在完成时概念 现在完成时 have/has+done 动词过去分词 被动语态 现在完成时的被动语态 表示 开始，一直持续到 的动作。 过去 现在 现在完成时概念1 past future now for “持续”+段时间，如three years, a long time… e.g. I have known you for a long time. since“自从”+过去的时间点/动作 e.g. I have not seen him since we met last week. A B 时间状语 延续性动词 2 表示 发生的或 的动作对 造成的 。 过去 已完成 现在 影响或结果 现在完成时概念2 past future now China's high-speed railways(高铁) have grown from 9,000 to 25,000 kilometres in the past few years. It's convenient for people to travel over long distances. So far, the little boy has learnt 200 words. He can understand this story 例句 2 表示 发生的或 的动作对 造成的 。 过去 已完成 现在 影响或结果 already 已经(肯定句) yet 已经（否定句或者疑问句） 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 现在完成时概念2 时间状语 past future now 现在完成时结构 现在完成时概念 现在完成时 have/has+done 动词过去分词 被动语态 现在完成时的被动语态 be done 现在完成时 + 被动语态 = ？ Mr Zhang has prepared the meat and vegetables. The meat and vegetables have been prepared by Mr Zhang. Read and pay attention to the words in red The Internet has changed our life. Our life has been changed by the Internet. What can you find 现在完成时的被动语态 The meat and vegetables have been prepared by Mr Zhang. Our life has been changed by the Internet. 1.Jan's life has been greatly improved by the Internet. 2.Much has been written about the wonders of the World Wide Web. 3.Has the Wi-Fi password been confirmed by you 4.The link has not been removed from the clothes. ... What can you find has been done 肯定 has been done 疑问 has not been done 否定 Who has been told haven't been told Have the children been told 三、现在完成时的被动语态的用法 1．表示一个被动的动作或状态开始于过去，持续到现在，并有可能持续下去。 常与for或since引导的时间状语连用，或用于How long...？句型中。 The machine has been tested for two hours. 这台机器已经测试了两个小时了。(可能还会继续被修) 2．表示被动的动作在说话之前已经完成，强调过去的动作对现在造成的影响或产生的结果。 通常与already，yet，never，recently等副词及时间状语so far，by now，up till now，before...等连用。 The project has already been finished. 工程已完成了。(结果是现在不用做这项工作了) The doctor hasn't been sent for yet. 还没有派人去请医生。(现在应派人去请医生) has been changed have been produced 四、使用现在完成时的被动语态要注意以下几点 1．与一般过去时的被动语态的区别 一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联系。 The museum was opened to the public last year. 去年这家博物馆向公众开放。(说明动作发生于过去 ... ...
