Unit 3 The Internet 现在完成时的被动语态课件-2022-2023学年高中英语人教版（2019）必修第二册

Unit 3 THE INTERNET Grammar: The Present Perfect Passive Voice Teaching objectives 1.Analyze the forms and features of the present perfect passive voice. 2.Find out the differences in meaning and function between the active and passive forms. 3.Master the functions of the present perfect passive voice in the context and use it in real situations. 2 现在完成时 定义 结构 句型 主动态 被动态 一般现在时 一般过去时 一般将来时 现在进行时 过去进行时 现在完成时 过去完成时 时态 语态 do/does am/is/are+ done did was/were + done shall/will do shall/will + be done am/is/are doing am/is/are + being done was/were doing was/were + being done has/have done has/have + been done had done had + been done 1 Read the pairs of sentences. Underline and compare the different verb forms. Jane's life has been greatly improved by the Internet. The Internet has improved Jane's life. Read and compare The first one is passive form, while the second one is active. has been v-ed has v-ed Much has been written about the wonders of the World Wide Web. People have written much about the wonders of the World Wide Web. Read and compare The first one is passive form, while the second one is active. 1 Read the pairs of sentences. Underline and compare the different verb forms. has been v-ed has v-ed 1 表示 开始，一直持续到 的动作。 过去 现在 现在完成时概念1： present(now) future past 过去的动作一直持续到现在 过去的动作对现在产生影响 现在完成时（The Present Perfect Tense） We have studied in senior high school for more than half a year. 2 表示 发生的或 的动作对 造成的 。 Past present 过去 已完成 现在 影响或结果 e.g. 1. I have just opened the door. (The door is not closed now.） 现在完成时概念2： 常用的时间状语有： ◆常与不确定的时间状语连用，如: these days, up to now, by now, lately, already, never, ever, just, yet, before, recently, so far, in the past few years等,表示“到目前为止”所发生的动作. 现在完成时的被动语态的用法 用法1:被动动作发生在过去,已经完成, 对现在造成影响或产生结果。(already, yet, so far, by now) The letter (post) already. ha