(
课件网) Unit 3 The Internet Period 3 Discovering useful structures Are you familiar with(熟悉) this game First blood double kill triple kill Quadra kill Penta kill An enemy _____ (slay)屠杀 There are many English expressions in the honor of kings, and do you know the meaning of them 第一滴血 二连击破 三连决胜 四连超凡 五连绝世 has been slain slay-slew-slain Present perfect passive voice 现在完成时的被动语态 主语 现在完成时的结构 Winter has already come(came,come), will it still be far in spring + have/ has + V-过去分词(done) present(now) future past Present Perfect Tense 现在完成时 What is Present perfect tense 现在完成时( The Present Perfect Tense)是 过去的动作或状态持续到现在对现在造成的影响，h或者已经结束，或者可能持续发生下去。 The classrooms are cleaned by students every day. The sentence was said by Lu xun long time ago--Emoji is the outcome of the human wisdom(智慧). (work out解决) This classic crime(经典犯罪活动) can be worked out by detective(侦探) Conan . 真想只有一个 被动语态的构成 1. The classrooms are cleaned by students every day. 2. The sentence was said by Lu xun. 3. This classic crime(经典犯罪活动) can be worked out by detective(侦探) Conan 被动语态的构成： 主语+ _____ +_____ be(am/is/was/are/were) done 1.以上句子中所使用的时态和语态是 。 现在完成时的被动语态 have/has +been＋过去分词 An enemy has been killed. An ally(队友) has been killed. You have been killed. 观察例句，归纳用法 一名敌人被击杀 我方队友被击杀。 你被击杀了。 2.现在完成时的被动语态的构成为： 。 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 请按照提示填空。 ①你的车已经修(repair)好了。 _____ ②地面还没打扫干净。 _____ ③那些房间粉刷(paint)了吗 _____ ④这部电影已经放映(be on)多久了 _____ Your car has _____ repaired. The floor has _____ been cleaned. _____ those rooms been painted How long _____ the film been on been not Have has 一、现在完成时的被动语态的常用句式 肯定式 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...？ The letter (post) already. has been posted Many houses (build) for the poor so far(到目前为止). have been built 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) 二、现在完成时的被动语态的用法 The machine (repair修理) for two hours but it still doesn’t work. has been repaired Paper money (use) for over 50 years. has been used 用法2:被动动作发生在过去,持续到现在,并有可能继续持续下去。 (for+一段时间; since) Everyone will feel extremely delighted if he_____(admit) to Tsinghua University. You shouldn’t leave school before your homework _____(finish). has been admitted has been finished 用法3:在时间/条件状语从句中表示可能/还没有 ... ...
