2020届二轮英语复习现在完成时的被动语态课件（30张PPT） 31页

Unit 3 Computers Grammar The Present Perfect Passive Voice 现在完成时的被动语态 Dear Jack, Long time no see! How are you these years? I hear that Xi’an has changed a lot these years and is now becoming an international city. As you know, I went to Xi’an ten years ago. How time flies! I still remember its beauty and the kind citizens there. I have a good impression on Xi’an, but it’s a pity that I have no time to visit it for myself at present. Could you please tell me some great changes in Xi’an in the past few years? Looking forward to your early reply. Yours, Peter Examples 1. 西安已经盖起了许多现代化大楼。 2. 大多数游乐公园已向公众免费开放 。 3. 四 条地铁线路建成并 已 开通。 4. 共享单车已经投放使用好几年了。 Learning targets 1. Discover and understand the structure of the present perfect passive voice. 2. Master the basic usages of the grammar. 3. Apply the grammar into writing . Look at the following sentence, paying attention to the underlined part. Example: Over time I have been changed a lot. Presentation First as a PC, and then as a laptop, I have been used in offices and homes since the 1970s. ( Line 16 ) 2. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told . ( Line 20 ) Discovery 3. Since the 1970s many new applications have been found for me. ( Line 25 ) 4. I have also been put into robots and used to make mobile phones as well as help with medical operations. ( Line 28 ) Discovery 5. I have even been put into space rockets and sent to explore the Moon and Mars. ( Line 30 ) Discovery Experience Exercise 1: Change the following sentences into the present perfect passive voice. Example: We have made a plan → A plan has been made . My friend has bought a new personal computer. 2. The shop has not repaired my computer so far. 1. My friend has bought a new personal computer. 2. The shop has not repaired my computer so far. → A new personal computer has been bought by my friend. → My computer has not been repaired by the shop so far. Exercise 2 Make the best choice 1. Almost all the parks ___ free to the public so far. A. will be opened B. have been opened C. were opened D. has been opened 2. These cultural relics___ in Shaanxi History Museum for twenty years. A. have been kept B. have been put C. have put D. have kept 3. I hear that those letters of advice___ last week. A. was wrote B. have been written C. were written D. has been written Examples: 1. My watch has just been repaired . 2. These cultural relics have been kept in Shaanxi History Museum for twenty years. Exploration What are the usages of the present perfect passive voice? 1. The influence that a past passive action has on the present. Eg. My watch has just been repaired . Conclusion The usages of the present perfect passive voice Examples: 1. My watch has just been repaired . 2. These cultural relics have been kept in Shaanxi History Museum for twenty years. Exploration What are the usages of the present perfect passive voice? Conclusion The usages of the present perfect passive voice 2. The state that a past passive action continues to the present. Eg. These cultural relics have been kept in Shaanxi History Museum for twenty years. Discussion & exploration What should we pay attention to when using the present perfect passive voice ？ 1. Those books have been kept from the library for a week. 2. “The Belt and Road” Shaanxi Xi'an • 2019 City Wall International Marathon took place on April 20. 3. The report has been listened to many times. Conclusion Aspects we should pay attention to 1. Have or has ? It's up to the form of the subject. Example: Those books _____ been kept from the library for a week. A. have B. has have 2. Durative ( 持续性的 ) or terminative verbs (终止性动词） ? Terminative verbs cannot be used in the positive sentence with the adverbial of a period of time. Eg : Those books have been ______from library for a week . A. borrowed B. kept kept Conclusion Aspects we should pay attention to 3. Characteristic words. The adverbials of a period of time , such as for a week, since the 1970s, as well as some adverbs of time showing experiences or frequency , such as ever, never, many times, already, yet, recently, so far, before and so on, are often used in the present perfect tense. Conclusion Aspects we should pay attention to Examples ： 1. “The Belt and Road” Shaanxi Xi'an • 2019 City Wall International Marathon was held on April 20. 2. The shared bikes _________ put into use for several years, which offers great convenience to the citizens of Xi'an. A. have been B. were have been Conclusion Aspects we should pay attention to 4. Transitive or Intransitive verbs ? Intransitive verbs cannot be used in the structure of the passive voice. Example: This report has been __________many times. A. listened B. listened to listened to Conclusion Aspects we should pay attention to 5. Correct spelling of the p.p. of verbs. Example: Several huge theme parks have been _______ in Xi’an. . A. builded B. built built Conclusion Aspects we should pay attention to Consolidation Exercise 1 Change the following sentences into the present perfect passive voice. 1. An unknown virus has just attacked my computer. 2. We have not solved the problem yet. → My computer has just been attacked by an unknown virus. →The problem has not been solved yet. Exercise 2: Correct the mistakes in the sentences 1. More international conferences have held in Xi'an in recent years. 2.Tom as well as his friends have been told many times not to play soccer in the street. been have →has ___ Production Finish the dialogue according to the given  information. —Hi, Tom, Nice to see you on Sunday ！ —Me, too, Jack! Where are you going today? —To the new cinema. I hear ________________________ （那里已经放映过好几部优秀影片） these days. Would you like to go with me to see whether there are new films? —I’d love to, but ______________ ( 我的作业还未完成 ) . —Oh, what a pity ！ By the way,_____ ( 你的自行车修好了吗 ) ？ Mine is broken. Could I borrow yours? —Of course you can, but please don’t lend it to others, OK? —I won’t. Thank you very much ！ —You are welcome! —Hi, Tom, Nice to see you on Sunday ！ —Me, too, Jack! Where are you going today? —To the new cinema. I hear __________________ _____________________ （那里已经放映过好几部 优秀影片） these days. Would you like to go with me to see whether there are new films? —I’d love to, but ________________________ ___________ ( 我的作业还未完成 ) . several good films have been shown there my homework hasn’t been finished yet Production Finish the dialogue according to the given  information. —Oh, what a pity ！ By the way, ______________ ____________ ( 你的自行车修好了吗 ) ？ Mine is broken. Could I borrow yours? —Of course you can, but please don’t lend it to others, OK? —I won’t. Thank you very much ！ —You are welcome! has your bike been repaired Production Finish the dialogue according to the given  information. Progress Finish the reply to Peter’s e-mail. Writing instructions: 1. 字数要求： 60 字左右。 2. 行文流畅，语言清晰，至少运用了两个 含有现在完成时被动语态的句子 。 Evaluation Group: Name Self-assessment Group-assessment Items Just so-so good better best Just so-so good better best Active Creative Cooperative Confident Logical Effective Others Today’s homework 1. Finish the exercises on page 57 in the workbook. 2. Improve your reply to the best. 3. Correct your partner's composition and find out attractive expressions. Thank you!