Unit 3 Discovering Useful Structures ppt课件-（2019）新人教版高中英语必修第二册(1).pptx

1、UNIT 3 THE INTERNETDiscovering Useful StructuresGrammarRead the pairs of sentences. Underline and compare the different verb forms.Activity 1Talk about something that has been doneJans life has been greatly improved by the Internet.Much has been written about the wonders of the World Wide Web.The In

2、ternet has greatly improved Jans life.People have written much about the wonders of the World Wide Web.How do we form the present perfect passive voice? Fill in the blank.have/has been + v -edChange the sentences into the present perfect passive voice. Activity 21I have downloaded the software to he

3、lp my phone battery last longer. 2Someone has lost an identity card. 3Have you confirmed the Wi-Fi password? 4Have you pressed the button yet to copy the file? 5Has anyone made a comment about the online database? EXAMPLE Theyve built a kind of new PC with more functions. A kind of new PC has been b

4、uilt with more functions.The software has been downloaded 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?Find out the differences in meani

5、ng and function between the active and passive forms.As we can see in the pairs of sentences，the object（主语） in an active sentence becomes the subject（宾语） in a passive sentence. Both sentence types convey a similar meaning，but they are slightly different. For example，in an active sentence，the subject

6、 is doing an action to an object，while in a passive sentence，the subject is having something done to it，and the doer of that action is not necessarily mentioned. Active sentences are used often，as they are more direct. Passive sentences are often used when the doer of an action is unknown，not import

7、ant，or preferred not named.Read the poem. Then think of your own situation and write a similar poem.Activity 3Look at the way the picture has been paintedListen to the way the song has been writtenLook at the way the film has been madeNow think about what you could create.Look at the way the needy（贫

8、困的人） have been helpedLook at the way the river has been cleanedLook at the way the tree has been plantedNow think how to make the world a better place. 提示：该诗歌中几乎每句都有“has/have been+过去分词”，构成现在完成时的被动语态Activity 41 A: Why cant I access my account? B:_ your personal information_（update) ?2 Both learning s

9、ites_（visit) by over 10, 000 people since last year.3 This keyboard_（not use) for a long time.4 Can you tell me what_（do) to bridge the digital divide?5 In the past year I_（inspire) to buy e-books instead of paper books.6 A: Where can I read those comments? B: Online. They_（post) already.7 It seems

10、that more health problems_（cause) by mobile phones.8 That app_（delete) from my smartphone already.Complete the sentences with the present perfect passive voice of the given verbs. (WORKBOOK P73 EX. 1)Hasbeen updatedhave been visitedhas not been usedhas been donehave been inspiredhave been postedhave

11、 been causedhas been deletedActivity 5Find and correct the mistake in each sentence.(WORKBOOK P74 EX. 2)EXAMPLEThis app was used several times since I downloaded it. 1 How much money has spent on the earthquake recovery?2 The girl is really upset because her new bicycle has stolen.3 These old houses

12、 have been built in the 18th century.4 Its a pity that the letter has never sent to his father.5 Little had been seen of them since they moved into the house down the street.has beenhas been spenthas been stolenwere builthas never been senthasEXAMPLEE-library on School Websitefor Students An e-libra

13、ry for students has been set up on the school website.1 Boys Video Streamed over Two Million Times2 5 Records Broken Today3 Intelligent Search Engine Designed for Teenagers4 Theft of Large Amount of Cash from Small Bank5 STUDENTS: 30% Discount on Smartphones6 Government Done Much to Stop Cyberbullie

14、sRead the newspaper headlines. Change them into complete sentences as the example.Activity 6(WORKBOOK P75 EX. 3)A boys video has been streamed over two million times.Five records have been broken today.An intelligent search engine has been designed for teenagers.A large amount of cash has been stole

15、n from a small bank.A 30% discount has been offered/given on smartphones to students.Much has been done by the government to stop cyberbullies.Notice to parentsDear Parents,We hope you will welcome this news. Almost 100 computers_（give) to us by a local computer company since the end of last year. A

16、 decision_（make) to begin a computer teaching experiment at our school. Our plan _ （support) with technical equipment and advice which_（provide) by the City Information Technology Centre. Every teacher_（provide) with a laptop since the beginning of this term. More recently, most of our courses _ （te

17、ach) using computers. We _（help) in our teaching by a lot of information from the Internet. Also, a new computer room _ (set up) in our school. We hope you will be happy with this exciting new development in our school. Complete the notice with the correct forms of the verbs in brackets.Activity 7(W

18、ORKBOOK P75 EX. 4)have been givenhas been madehas been supportedhas been providedhas been providedhave been taughthave been helpedhas been set up 单元语法 现在完成时的被动语态1 构成肯定式：have/has + been done否定式：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?2 用法（1）表示一个被动

19、的动作在说话之前已完成，强调过去的动作对现在造成的影响或结果，通常与 already，yet，just，never，recently 等副词连用。I got caught in the rain and my suit has been ruined. 我被雨淋了，衣服全毁了。（2）表示一个被动的动作或状态从过去开始一直持续到现在，常与for 或 since 引出的时间状语连用，或用于 how long 引出的句子中。A great many machines have already been produced by the factory since the technological r

20、evolution. 自从技术革命以来，这家工厂已经生产了许多机器。（3）用在时间或条件状语从句中，表示将来已完成的被动动作，即用现在完成时的被动语态代替将来完成时的被动语态。She will leave for the cinema as soon as the application form has been completed. 申请表一填好，她就去看电影。 常与现在完成时连用的时间状语：already 已经 yet 已经recently/lately 最近 since then 从那时起ever since 自那以来 ever 曾经so far 迄今为止 for a long tim

21、e 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 few years 在过去的几年里Their new cars have been advertised on the Internet for a long time.他们的新车在网上做广告已经很长时间了。3 注意事项（1）与一般过去时的被动语态的区别 动作发生的时间 对现在有无影响 一般过去时的被动语态 过去 无 现在完成时的被动语态 过去 有（2）borrow，begin，start，buy，marry，open，join 等非延续性动词的现在完

22、成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，需要改变动词或时态。这本书借了一周了。The book has been borrowed for a week. （）The book has been kept for a week. （）这个工程已经开始多久了？How long has this project been started? （）How long ago was this project started? （）非延续性动词的否定式可表示动作的持续过程，具有持续性，因而可与 since 或 for 引出的时间状语连用。（3）带有双宾语的动词，如 give，sen

23、d，bring，take，teach，show，tell，make，sing，write，sell，buy，lend，offer，hand，pass，get 等，变为被动语态时，一般是把指人的间接宾语变为主语。如果将直接宾语变为被动句的主语，间接宾语前要加 to 或 for。We have been told the time of the lecture.我们已被告知讲座的时间。（4）带有复合宾语（宾语 + 宾语补足语）的动词变为被动语态时，只能将宾语变为主语，原来的宾语补足语保持不动。主动语态中不带 to的不定式作宾补，在被动语态中要加上 to。The workers have been

24、made to work a whole day without stop.工人们被迫不停地干了一整天。（5）短语动词变为被动语态时，要注意保持短语动词的完整性，不可漏掉动词后面原有的介词或副词。此类短语动词有： 动词 + 介词refer to，look after，call on，rely on，look for，look at，listen to，dream of，meet with，laugh at，result in，wait for，deal with，operate on 动词 + 名词 + 介词pay attention to，make use of，take part in，k

25、eep an eye on，make fun of，catch sight of，take a note of，take care of 动词 + 副词turn on，turn off，carry on，carry out，think over，make up，set up，put down，hand in，point out，call up . 单句语法填空(1) Their new house （decorate）for two months and they will settle in it in the near future.(2) Hundreds of excellent at

26、hletes （select）from millions of people all over the country in the past two months.(3) A new library and a gym in our school （set）up so far and they will be put into use very soon.(4) Great changes （take）place in my hometown and a lot of factories _（set）up in the past ten years.(5) Every possible me

27、ans （try）to save the wounded soldier up to now.(6) How many suggestions （give）to you so far?(7) All the preparations for the task （make），and were ready to start.(8) In the last few years thousands of films （produce）all over the world.(9) Despite the previous rounds of talks, no agreement (reach) so

28、far by the two sides.(10) We cant go on with the experiment because the computer （not repair）. has been decorated have been selected have been set have taken have been set has been tried have been given have been made have been produced has been reached hasnt been repaired . 将下列句子改为被动语态（1）They have

29、just connected the printer to the computer. _（2）We have planted many trees on the hill in the last five years. _（3）Tom hasnt sold out all the magazines. _ （4）Have you found ways to make waste water clean? _ （5）She has already returned this book to the library. _The printer has just been connected to

30、 the computer（by them）. Many trees have been planted on the hill in the last five years（by us）. All the magazines have not been sold out（by Tom）. Have ways been found to make waste water clean（by you）? This book has already been returned to the library（by her）.(6) He has sent me an e-mail. _ _ (7) W

31、e have seen him lie on the ground. _ (8) Jane has referred to the book. _ (9) Tom has paid much attention to his handwriting. _ _ I have been sent an e-mail.An e-mail has been sent to me.He has been seen to lie on the ground. The book has been referred to（by Jane）. Much attention has been paid to To

32、ms handwriting. Toms handwriting has been paid much attention to. . 完成句子（1）The boys （已经被多次告知）not to swim in that lake，but it doesnt make any difference.（2）With the help of high technology，more and more new substances_ （被发现）in the past few years.（3）When and where to go for the on-salary holiday_（没有确定

33、）yet.（4）Though we dont know what was discussed，yet we can feel the topic _（已经被改变了）.（5）He （已被挑选出来）to take part in the sports meeting. （6）The ink （还没有去掉）the clothes.（7）Financial problems of the company （已被讨论了）for nearly two hours. have been told many timeshave been discoveredhas not been decidedhas be

34、en changedhas been selectedhas not been removed from have been discussed01PART ONELanguage points核心词汇1 function n. & vi.（1）n. C，Un. 功能；作用；机能搭配：perform a function 发挥功能；履行职责 the function of the heart 心脏的功能（2）vi. 起作用；正常工作；运转搭配 2 confirm vt. 确认；使确信；批准confirm that/wh-. 证实It has been confirmed that. 已经证实confirm sb. in sth. 使某人确信某事confirm sb. as sth. 任命某人担任某职位3 press vt. 按；压；敦促搭配 press.against/on. 把按在上 press a button/switch/key 按下按钮开关；按键复习：pressure n. 压力；劝说，强迫under pressure 处于压力下THE END