Unit 3 The Internet Discovering Useful Structures ppt课件-（2019）新人教版高中英语必修第二册(2).pptx

1、The present perfect passive voice现在完成时的被动语态Unit 3 The Internet1.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

2、use it in real situations.Find all the sentences using “have/has done” or “have/has been done” on page 281. Much has been writeen about the wonders of the World Wide Web.2. There are countless articles telling us how the Internet has made our lives more convenient.3.But the Internet has done much mo

3、re 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 6. Her company has become quite successful.7. Jan has started taking online classes to learn more about how to use the Internet to ma

4、ke society better.8.Jans life has been greatly improved by the Internet.Jans life has been greatly improved by the Internet.Much has been written about the wonders of the World Wide Web. Read the pairs of sentences. Underline and compare the different verb forms.The Internet has greatly improved Jan

5、s life.People have written much about the wonders of the World Wide Web.Verb form How do we from the present perfect passive voice? Fill the blank.Activehave/has + v-edPassive_have/has been + v-edThe Present Perfect Tense(现在完成时)present(now)futurepast Present Perfect Tense 现在完成时现在完成时(1)主语主语 + have/ h

6、as + V-过去分词过去分词(done)助动词助动词,无意义无意义 一：现在完成时的结构一：现在完成时的结构Winter has already come(came,come)，will it still be far in spring ?注：主语若是注：主语若是第三人称单数第三人称单数助动词用助动词用 hasYou have planted all the trees.I have planted all the trees.He/she has planted all the trees.They have planted all the trees. 练习：区别练习：区别have和和

7、has的用法的用法 Summary:主语若是第三人称单数助动词用主语若是第三人称单数助动词用 has陈述句陈述句: : 主语主语+has/ have（not）+P.P.+.一般疑问句一般疑问句: : Has/have+主语主语+P.P.+.?特殊疑问句特殊疑问句: 特殊疑问词特殊疑问词+have/has +P.P.+.?e.g. He has gone to Beijing. (go -went-gone)have/has+not，可缩写为havent/hasnt） 肯定回答：肯定回答：Yes , 主语主语 have/has. 否定回答：否定回答：No , 主语主语 havent/hasnt.

8、e.g. Where has he gone?Summary：现在完成时的的结构：现在完成时的的结构：肯定式：肯定式：S+have/has+V-过去分词(done)否定式：S+have/has+not+V-过去分词. 一般疑问句：Have/Has+S+V-过去分词. 特殊疑问句：疑问词+have/has+S+V-过去分词.人教版2019版 高一 unit3 The Internet grammar【优秀课件】二：现在完成时的二：现在完成时的用法用法(1) 表示到表示到现在现在为止已经为止已经完成完成或刚刚或刚刚完成完成的动作。的动作。Eg：Now we have planted all the

9、 trees.He has just come back. They have built many buildings in this city. 2) 表示过去发生的动作表示过去发生的动作,强调强调结果结果或或对现在的影响对现在的影响。Someone has broken the window. (窗户现在是坏的窗户现在是坏的)某人把窗户打破了。某人把窗户打破了。I have already lost the key. (我现在没有钥匙我现在没有钥匙)I havent read that book yet . (不了解书的内容不了解书的内容)I have just cleaned my h

10、ands. (手是干净的手是干净的)常与常与already(已经已经), yet(到现在还没有到现在还没有), just(刚刚刚刚),ever(曾经曾经)等词连用等词连用. already: 常用于肯定句中常用于肯定句中. yet: 常用常用于否定句于否定句,疑问句疑问句尾尾. 人教版2019版 高一 unit3 The Internet grammar【优秀课件】人教版2019版 高一 unit3 The Internet grammar【优秀课件】3) 表示从表示从过去开始过去开始并持续到并持续到现在现在的动作或状态，常与的动作或状态，常与包括现在在内的一段时间的状语连用。包括现在在内的一

11、段时间的状语连用。She has learned English for 5 years. 她学英语有五年了。He has lived in Beijing since （自从） 5 years ago.他五年前就住在北京了。 since+ since+forfor时间段（一段时间）时间段（一段时间）一个时间点一段时间ago从句人教版2019版 高一 unit3 The Internet grammar【优秀课件】人教版2019版 高一 unit3 The Internet grammar【优秀课件】The present perfect passive voice现在完成时的被动语态人教版2

12、019版 高一 unit3 The Internet grammar【优秀课件】人教版2019版 高一 unit3 The Internet grammar【优秀课件】现在完成时的结构现在完成时的结构:S + have/ has + V-过去分词过去分词（done）被动语态的结构被动语态的结构:be（been）+ V-过去分词（过去分词（done）Summary：现在完成时的被动语态肯定式：现在完成时的被动语态肯定式：主语主语+have/has+been+V-过去分词过去分词人教版2019版 高一 unit3 The Internet grammar【优秀课件】人教版2019版 高一 unit

13、3 The Internet grammar【优秀课件】肯定式：肯定式：S+have/has+been+done(V-过去分词)否定式：S+have/has+not+been+done. 一般疑问句：Have/Has+S+been+done. 特殊疑问句：疑问词+have/has+S+been+done. 一：一：现在完成时的被动语态的结构现在完成时的被动语态的结构人教版2019版 高一 unit3 The Internet grammar【优秀课件】人教版2019版 高一 unit3 The Internet grammar【优秀课件】练习：练习：The children have alre

14、ady 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：否定句：The children have not/havent been told the good news yet.一般疑问句：一般疑问句：特殊疑问句（对划线部分提问）：特殊疑问句（对划线部分提问）：练习：练习：补全句子补全句子很抱歉，但是这些信件还没有被打印很抱歉，但是这些信件还没有被打印(type)出来。出来。Im sorry, but the l

15、etters _ yet.这项计划已被讨论这项计划已被讨论(discuss)了两个小时了。了两个小时了。The plan _ for nearly two hours. 从那时起，她就没来过信从那时起，她就没来过信(hear from)。She _ since then.have not been typedhas been discussed人教版2019版 高一 unit3 The Internet grammar【优秀课件】has not/hasnt been heard from二：现在完成时被动语态的二：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

16、去的动作对现在造成的影响或结果，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】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 homet

17、own in the past ten years.have taken二：现在完成时被动语态的二：现在完成时被动语态的用法用法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?二：现在完成时被动语态的二：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

18、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)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】二：现在完成时被动语态的二：现在完成时被动语态的用法用法常与现在完成时连用的时间状语：already 已经(肯定句) yet 已经（否定句或者疑问句）recently/lately 最近 since then 从那时起ever sin

19、ce 自那以来 ever 曾经so far 迄今为止 for a long time 很长一段时间by now 到现在为止 in recent years 在最近几年里in/during/over the past/last years在过去的几年里人教版2019版 高一 unit3 The Internet grammar【优秀课件】练习：练习：用现在完成时的被动语态改写句子。用现在完成时的被动语态改写句子。 Jack boss has always praised him for his devotion(热爱) to work. Jack _ by his boss for his de

20、votion to work. They have found a good place to build a temple in the village. A good place _ to build a temple in the village.We havent yet decided how to solve that difficult technological problem. How to solve that difficult technological problem _ yet.人教版2019版 高一 unit3 The Internet grammar【优秀课件】

21、has always been praisedhas been foundhas not been decided练习：练习：补全句子。补全句子。 当我的家庭作业完成时我就回家。I will go home when my homework _.纸币已被使用了1000多年。Paper money _.人教版2019版 高一 unit3 The Internet grammar【优秀课件】人教版2019版 高一 unit3 The Internet grammar【优秀课件】has been used for more than 1000 yearshas been finished Chang

22、e the sentences into the present perfect passive voice. Theyve built a kind of new PC with more functions. A kind of new PC has been built with more functions.EXAMPLEI have downloaded the software to help my phone battery last longer.Someone has lost an identity card.The software has been downloaded

23、 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