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课件网) 教学教材：外研版高中英语新教材必修第三册 教学内容：Unit 3 The world of Science 第三课时：Using language： Present perfect passive 深圳市宝安中学（集团）高中部 March 22nd, 2021 a. I guess you have been asked about the title of your book before. b. New inventions like 3D printers have been used to make replacement hearts and bone parts. What has happened to “you” in sentence (a) Group 1 People Who has used new inventions to make replacement hearts and bone parts in sentence (b) c I guess someone has asked you about the title of your book before. d People have used new inventions like 3D printers to make replacement hearts and bone parts. a. I guess you have been asked about the title of your book before. b. New inventions like 3D printers have been used to make replacement hearts and bone parts. Compare them with the following sentences and answer the questions. present perfect active form present perfect passive form Group 1 Group 2 c I guess someone has asked you about the title of your book before. d People have used new inventions like 3D printers to make replacement hearts and bone parts. a. I guess you have been asked about the title of your book before. b. New inventions like 3D printers have been used to make replacement hearts and bone parts. Why does the author choose to use the passive form instead of the active present perfect active form present perfect passive form Group 1 Group 2 To emphasize the object: “you” and “new inventions”. 被动语态的使用情况： 1. 不知道或者没有必要说明动作的执行者是谁； Such books have been written for children. 2. 强调动作的承受者，而不是动作的执行者； All the products have been tested. 3. 动作的执行者很模糊; The letter has been opened. 4. 有时候为了礼貌的需要，避免说出动作的执行者。 They have been told many times not to make noises. Now let’s read more examples. How many books has J.K. Rowling written J.K. Rowling has written seven books. Seven books have been written by Rowling. Workers have built the house since years ago. The house has been built by workers since years ago. The buildings have been destroyed in the earthquake. The earthquake has destroyed the buildings. A lot of trees have been planted in our country. Present perfect passive 现在完成时的被动语态 内容要点 1. 概 念 2. 构 成 3. 用 法 4. 注 意 have/has been done 强调一个发生在过去的被动动作。 表示动作已经完成，对现在造成的影响或结果； 主语为动作的承受者，与谓语动词是被动关系。 (1)The door has been locked. (2)These flowers have been watered, and you can go home. (3)Our classroom has been cleaned, so you needn't clean it now. So even the olive wreath (橄榄枝花环) has been replaced! 1.肯定式： have / has + been + done 2.否定式： have / has + not + been + done An opinion is what someone believes is true but has not been proved. 构成 3.一般疑问句: 需将_____提到主语的前面。 (1) Has his bike been repaired (2) Have they been notified about it 4. 特殊疑问句： 提问主语： 提问其他 ... ...
