【课件】Unit 3 The Internet Period 3 Discovering Useful Structure 课件(16张ppt)(人教版新教材必修第二册)

1、Unit 3 The InternetPeriod 3Grammar1. Identify and summarize the form and the functions of the present perfect passive voice;2. Compare the present perfect passive voice with the active, and change the active form into the passive form;3. Apply the present perfect passive voice into use;Learning Aims

2、语法感知感知以下课文原句，完成方框下的小题感知以下课文原句，完成方框下的小题我方击杀一名敌人。我方击杀一名敌人。An enemy has been slained.我方队友被击杀。我方队友被击杀。An ally has been slained.你被击杀了。你被击杀了。You have been slained.1.以上句子中所使用的时态和语态以上句子中所使用的时态和语态是是 。2.现在完成时的被动语态的构成为现在完成时的被动语态的构成为： 。现在完成时的被动语态现在完成时的被动语态have/has been过去分词过去分词The Present Perfect Passive Voice现在

3、完成时的被动语态1. 被动语态现在完成时形式A. 陈述句： 主语+ have/has (not) +been+doneB. 疑问句： (疑问词)+ have/has +主语+been+ done? 2. 被动语态现在完成时的用法(1) 表示某一被动动作发生在过去(现在说话前)，但与现在的情况有联系。常与下列时间状语连用：just, already, yet, before, recently, lately, so far等。The door has been locked. 门已经被锁上了。（现在说话时门是锁着的）Compare: The door was locked. 门当时是锁着的/被

4、锁上了。 （与现在说话时门的状态无关，可能锁上或重新打开了）。(2) 表示某一延续性的被动动作或状态从过去某时一直延续到现在说话时，并有可能继续下去。与since, for , all day, in/for/over/ during the past/last few years 等表示的时间状语连用。E.g. The bank has been closed since July/for several weeks. 自从七月以来银行一直关门/已经关门好几个星期了。E.g. The child has been taken care of by Grandma Wang all these

5、 years. 这多些年来这孩子一直又王奶奶照看。(3) 用在时间和条件状语从句中, 表示将来某时已完成的动作。如：E.g. Well start out as soon as the work has been finished. 工作一完成我们将出发。 注意：下来情况下用被动语态：1.强调动作的承受者，即动作的承受者是谈话的中心。2.不知道或不必要或为了委婉 /礼貌, 不便说出动作的发出者。3.当动作的执行者带有较长的定语。1. Much has been written about the wonders of the World Wide Web.2. Peoples lives ha

6、ve been changed by online communities and social networks. 3. Many people have been helped by the club. 4. Jans life has been greatly improved by the Internet. 1. People have written much about the wonders of the World Wide Web. 2. Online communities and social networks have changed peoples lives.3.

7、 The club has helped many people. 4. The Internet has greatly improved Jans life. Which group is better? Why?Compare and Find1. Much has been written about the wonders of the World Wide Web. Observe and translate the following sentences, and try to find something in common from these sentences.2. Pe

8、oples lives have been changed by online communities and social networks.3. Many people have been helped by the club.已经被书写已经被书写已经被改变已经被改变have/ has been done 已经被做已经被做表示表示 “某人某人/某事某事/某物已某物已经被经被”已经被帮助已经被帮助has been written have been changedhave been helped Tips: Tips: 常与现在完成时连用的时间状语常与现在完成时连用的时间状语( (是否都用完

9、成时是否都用完成时) )already already 已经已经yet yet 已经已经recently/lately recently/lately 最近最近 since then since then 从那时起从那时起ever since ever since 自那以来自那以来 ever ever 曾经曾经so far so far 迄今为止迄今为止 for a long time for a long time 很长一段时间很长一段时间by now by now 到现在为止到现在为止 in recent years in recent years 在最近几年里在最近几年里in/durin

10、g/over the past/last yearsin/during/over the past/last years在过去的几年里在过去的几年里for+for+时间段时间段1.1.副词的位置副词的位置(1) Such a man has hardly been believed.(2) The machine has already been repaired.注意：注意：2.2.并不是所有动词都有被动语态并不是所有动词都有被动语态不及物动词不及物动词和和系动词系动词都都没有被动语态没有被动语态形式。但它形式。但它们中的们中的某些不及物动词某些不及物动词虽为虽为主动形式主动形式，却，却可表

11、示可表示被动意义被动意义。(1) The steel feels cold.(2) The book smells old.(3) Good medicine tastes bitter.所有的所有的及物动词都有被动语态及物动词都有被动语态？often, usually, always, never, hardly, seldom等副词等副词置于置于have/has和和been中间。中间。错，只有及物动词才有被动语态形式，但错，只有及物动词才有被动语态形式，但不是所不是所有的及物动词有的及物动词都是如此，如某些都是如此，如某些表示状态或表示表示状态或表示关系的动词或短语关系的动词或短语只有主动

12、语态，而只有主动语态，而无被动语态无被动语态。常见的这类动词有：常见的这类动词有：cost (花费花费), fit (适合适合), have (有有), hold (容纳容纳), lack (缺乏缺乏), own (占有占有), suit(适合适合), fail (失失败败), belong to (属于属于), agree with (同意同意)等。等。e.g. (1) Taiwan belongs to China. (2) The coat cost me 300. 拓展：所有的及物动词都有拓展：所有的及物动词都有被动被动语态？语态？The patients have been take

13、n good care of.3.3.短语动词不可分割也不可省略其中的介词或副短语动词不可分割也不可省略其中的介词或副 词。词。Verb formHow do we from the present perfect passive voice? Fill the blank.Activehave/has + donePassive_have/has been + done(P30 T2) Change the sentences into the present passive voice.Example: Theyve bulit a kind of new PC with more fun

14、ctions. A kind of new PC has been built with more functions.1.I have downloaded the software to help my phone battery last longer.2.Someone has lost an identity card.3.Have you confirmed the Wi-Fi password?4.Have you pressed the button yet to copy the file?5.Has anyone made a comment about the onlin

15、e database? 1. I have downloaded the software to help my phone battery last longer.2. Someone has lost an identity card.3. Have you confirmed the Wi-Fi password?4. Have you pressed the button yet to copy the file?5. Has anyone made a comment about the online database? The software has been downloade

16、d to help my phone battery last longer.An identity card has been lost.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?SUMMMARY现在现在完成完成时的时的被动被动语态语态含义含义结构结构表示过去发生的被动动作现在已经完表示过去发生的被动动作现在已经完 成或仍将持续成或仍将持续, 强调对现在的

17、影响强调对现在的影响have/has been done形式形式肯定式肯定式否定式否定式疑问式疑问式have/has been donehave/has not been doneHave/Has+主语+been done?特殊疑问词+have/has+主语+been done?用法用法表示已经完成的被动动作表示已经完成的被动动作表示开始于过去并可能持续下去的被动动作表示开始于过去并可能持续下去的被动动作在时间状从在时间状从,条件状从中条件状从中,表示还未发生的被动动作表示还未发生的被动动作注意注意事项事项区分区分have/has been done/ be being done/ be do

18、ne不及物动词或词组无被动不及物动词或词组无被动Prace Great changes1._(take) place in my hometown in the past few decades. The public facilities(设施) 2._(improve) so far. Many 3._(road) have been widen. Besides, More attention has been given to the 4._(environment) protection, so many trees and flowers 5._(plant) now. The water in the