Unit 3 The Internet Discovering Useful Structures ppt课件-（2019）新人教版高中英语必修第二册(3).pptx

1、Unit 3 The InternetThe present perfect passive voice现在完成时的被动语态1.identify and summarize the form and the functions of the present perfect passive voice;pare the present perfect passive voice with the active, and change the active form into the passive form;3.apply the present perfect passive voice to

2、 interpret the newspaper headlines and create a poem.n By the end of this period, you will be able toFind all the sentences using “have/has done” or “have/has been done” on page 281. Much has been written about the wonders of the World Wide Web.2. There are countless articles telling us how the Inte

3、rnet has made our lives more convenient.3.But the Internet has done much more for people than simply make lfie more convenient.4.Peoples lives have been changed by online communities and social networks.5. Many people have been helped by the club.6. Her company has become quite successful.7. Jan has

4、 started taking online classes to learn more about how to use the Internet to make society better.8.Jans life has been greatly improved by the Internet.Underline and compare the different verb forms.Activehave/has + v-edPassivehave/has + been + v-edUnderline and compare the different verb forms.Acti

5、vehave/has + v-edPassivehave/has + been + v-edVerb form How do we from the present perfect passive voice? Fill the blank.Activehave/has + v-edPassive_have/has been + v-ed 现在完成时概念现在完成时概念1：for: 后接一段时间，如three years, a long timee.g. I have known you for a long time.since:自从 后接过去的时间点/动作e.g. I have not se

6、en him since we met last week.AB常用的时间状语有：常用的时间状语有： have just opened The door is not closed now.） 现在完成时概念现在完成时概念2：常用的时间状语有：常与连用，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“”所发生的动作. have read . has been . 发生过若干次发生过若干次3.

7、 现在完成时用于谈论 的事情.现在完成时概念现在完成时概念3：never, twice, three times, many times等常用的时间状语有： 现在完成时谓语动词的构成现在完成时谓语动词的构成 1 have / has 和以前一样选择：当主语是 _ 用has , 用have第三人称单数其他人称2 done在现在完成时中叫 ，原型是do/does。过去分词have/has+ done现在完成时的基本句型现在完成时的基本句型现在完成时 (Active Voice)肯定式 have/has done否定式 have/has not done一般疑问句 have/has + 主 + do

8、ne？特殊疑问句 疑问词- have/has + 主 + done？ 被动语态 构成：be及物动词的过去分词。用法：(1)动作的执行者不知道是谁或难以说明时常用被动语态，(2) 当强调动作的承受者时,用被动语态,如:Street lights are often turned on at six in winter. This kind of bicycle is not sold in our shop现在完成时现在完成时+被动语态被动语态=？Discovering现在完成时 (Passive Voice)肯定式 have/has been done否定式 have/has not been

9、 done一般疑问句 have/has + 主语 + been done特殊疑问句 特殊疑问词+have/has+主语+been done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/doesam/is/are+ done didwas/were + doneshall/will doshall/will + be doneam/is/are doingam/is/are + being donewas/were doingwas/were + being donehas/have donehas/have + been donehad don

10、ehad + been done练习：The children have already been told(tell) the good news.Have the children been told the good news yet?Who has been told the good news yet?否定句：The children have not/havent been told the good news yet.一般疑问句：特殊疑问句（对划线部分提问）：现在完成时被动语态的现在完成时被动语态的用法用法1. 现在完成时的被动语态同它的主动语态一样，强调过去的动作对现在造成的影

11、响或结果，通常和already, yet, just, never, recently 等副词连用。e.g: 机器已经修(repair)好了。The machine has alredy been repaired.人教版2019版 高一 unit3 The Internet grammar【优秀课件】注意：有些动词没有被动语态, 如不及物动词happen, take place, break out等。1.Great changes _(take) place in my hometown in the past ten years.have taken现在完成时被动语态的现在完成时被动语态

12、的用法用法2.表示一个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/since引导的时间状语连用，或用于 “How long.”句型中。e.g: 这个问题已经被讨论了将近两个小时。The problem has been discussed for nearly two hours.这部电影已经放映了多长时间？How long has the film been shown?现在完成时被动语态的现在完成时被动语态的用法用法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，也就是用现在完成时的被动语态替代将来完成时的被动语态。e.g: 在你的作业没完成(finish)

13、之前你不应该离开学校。You shouldnt leave school before your homework has been finished.人教版2019版 高一 unit3 The Internet grammar【优秀课件】EXAMPLESThe Internet has greatly improved Jans life. Jans life has been greatly improved by the Internet.People have written much about the wonders of the World Wide Web. Much Chan

14、ge the sentences into the present perfect passive voice. EXAMPLESThe Internet has greatly improved Jans life. Jans life has been greatly improved by the Internet.People have written much about the wonders of the World Wide Web. Much has been written about the wonders of the World Wide Web. Change th

15、e sentences into the present perfect passive voice. I have downloaded the software to help my phone battery last longer.Someone has lost an identity card.The software has been downloaded to help my phone battery last longer.An identity card has been lost.Have you confirmed the Wi-Fi password?Have you pressed the button yet to copy the file?Has anyone made a comment about the online database?Has the Wi-Fi password been confirmed?Has the button been pressed yet to copy the file?Has a/any comment been made about the online database?Thank You