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课件网) Unit 3 The World of Science Present perfect passive 1.To understand the general knowledge of present perfect passive. 2. To be able to use present perfect passive in proper situations. Learning aims 1. This evening, I’ll be talking to Dr Richard Fairhurst, whose new book The New Age of Invention ___just _____ _____ has been published 2. I guess you _____ _____ _____(ask) about the title of your book before. have been asked Read the sentences. Pay attention to the words in red. Leading-in 4. New inventions like 3D printers _____ (use) to make replacement hearts and bone parts. have been used 5. Nothing like this _____ (invent) yet and I’d say we’re a long way from an invention like that at the moment! has been invented 3. In addition, important advances _____ (make) in medicine and environmental science thanks to increasing computer power. have been made 现在完成时的被动语态 现在完成时的被动语态强调过去的动作对现在造成的影响或结果, 但主语为动作的承受者, 表示“……已经被……”。 考点一 现在完成时的被动语态的构成 肯定式 主语＋have/has been done... 否定式 主语＋have/has not been done... 一般疑问式 Have/Has＋主语＋been done...？ 特殊疑问式 疑问词＋have/has＋主语＋been done...？ He has been selected to take part in the sports meeting. 他已被挑选出来参加运动会。 The ink has not been removed from his overcoat. 墨迹还没有从他外套上去掉。 Has the date for the next meeting been decided 下次会议的日期确定了吗？ How long has the battery not been changed 电池多久没有更换了？ 【即学即练】 (1)The experiment ___ _____ _____successfully. 这个实验做得很成功。 (2)The books _____ ___ _____ _____by the students. 那些书还没有被学生们借走。 has been done have not been borrowed (3)____ the sports meeting _____ ___ ___until next Friday 运动会已经推迟到下周五了吗 (4)So even the olive wreath ___ _____ _____. 就连橄榄枝花环也被取代了。 Has been put off has been replaced 考点二 现在完成时的被动语态的用法 1．表示被动的动作在说话前已经完成，强调过去的动作对现在造成的影响或结果，通常与already、 yet、 just、 never、 recently、 lately等副词以及时间状语so far、 by now、 up till now、 since、 in/during/over the past/last years等连用。 The machine has already been repaired. 2．表示被动的动作或状态开始于过去，持续到现在，并可能持续下去，常与for或since引导的时间状语连用，或用于“How long...？”句子中。 (2024·浙江一月高考)Sydney and the New South Wales coast have been hit by heavy rains.悉尼和新南威尔士州海岸遭受了暴雨袭击。 How long has this film been shown 这部电影已放映多长时间了？ 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。 You shouldn't leave school before your homework has been finished. 在你的作业没完成之前，你不应该离开学校。 【温馨提示】 现在完成时的被动语态与一般过去时的被动语态的区别 现在完成时的被动语态侧重于表示一个被动的动作或状态尽管发生在过去，但该动作或状态对现在造成了影响或产生了结果；而一般过去时的被动语态表示一个被动的动作发生在过去的某个时间，其结果对现在没有影响。 The big fire h ... ...
