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

1、 Discovering Useful Structures: Report an ongoing event contentsIIIThe structure of present continuous passive voice Language points HomeworkThe structure of present continuous passive voiceWhat kind of tense do the two dialogues use?Read the three sentences and try to find the functions of present

2、continuous passive voice. African elephants are being hunted. What is being done to help them? What measures are being taken to help them?When should we use present continuous passive voice?1. My house is being painted now.2. Look! The baby is being taken care of by her aunt.3. Pandas are being prot

3、ected in Wolong National Reserve.( (一一) )表示表示说话时说话时正在进行的被动动作正在进行的被动动作, , 强调主语是动作的承受者。强调主语是动作的承受者。常与常与now, look等词连用。等词连用。4. Many speeches about Chinese traditional culture are being held these days. 5. A modern school is being built for the students these months.When should we use present continuous

4、passive voice?（二）表示（二）表示现阶段现阶段正在进行的被动动作正在进行的被动动作, , 但此动作不一定在此时但此动作不一定在此时此刻发生。此刻发生。6. A Christmas party is being held tonight.7. Some rock music is being played by them next.（三）表示（三）表示按计划或安排按计划或安排将要进行的一个被动动作。将要进行的一个被动动作。When should we use present continuous passive voice?8. Tom is always being praise

5、d by the teacher.9. The grain is often being sold for export.( (四四) )表示表示经常经常的被动行为的被动行为, , 常和常和always, often, constantly等等词连用词连用( (表示某种感情色彩表示某种感情色彩) )。When should we use present continuous passive voice?Compare and find1. The plan is being discussed at the meeting now. 2. The baby isnt being taken g

6、ood care of.3. Is a new library being put up in their school now?4. Where are some trees being cut down by workers?What is the structure of present continuous passive voice?肯定结构否定结构一般疑问结构特殊疑问结构be (am / is / are) being donebe (am / is / are) + not + being donebe (am / is / are) + 主语 + being done特殊疑问词

7、 + be (am / is / are) + 主语 + being done1. The grammar which _ (learn) now is easy to master. 2. Some animals _ (protect) well enough now. 3. The sports meeting _ (hold) in our school at present.is being learnedare being protectedis being heldPresent continuous passive voice4. 这座桥没有在重建。这座桥没有在重建。5. 他们

8、学校正在建设一座新图书馆吗？他们学校正在建设一座新图书馆吗？6. 现在对这台机器要采取什么措施？现在对这台机器要采取什么措施？The bridge is not being rebuilt.Is a new library being put up in their school now?What is being done to the machine?Present continuous passive voiceLiu Tao would like to express his concern over the wetland in his hometown. Help him fini

9、sh the passage with the present continuous passive voice of the verbs in brackets. (P18 Exercise 3)P18: Exercise 3In the wetland of my hometown, there are many different kinds of animals, including wild birds, fish, snakes, insects and so on. When I was in primary school, I often went there with my

10、friends to watch the birds and study them. That was an interesting place for all of us. But things have begun to change in recent years. Small birds _ (catch) with nets. Wild ducks _ (sell) at foodare being caughtare being soldFish and snakes _ (kill) for food in restaurants and even worse, the wetl

11、and _ (destroy). Some parts _ (cover) with new houses. You can see rubbish everywhere. The wetland _ (pollute) seriously every day. I am very worried about it. What can we do?are being killedis being destroyedare being covered is being pollutedP18: Exercise 31. Every year over 29,000 antelopes _ (ki

12、ll) in Tibet.2. In the past, the elephants _ (kill) by farmers.3. In the past twenty years, a large number of bamboo areas _ (set up) to help pandas grow.are killedwere killedhave been set up一般现在时被动语态一般现在时被动语态一般过去时被动语态一般过去时被动语态现在完成时被动语态现在完成时被动语态Revision of the Passive Voice Revision of the Passive V

13、oice 4. At present a new home _ (build) for pandas.is being built现在进行时被动语态现在进行时被动语态5. WWF hopes that more and more wild animals _ (protect) in the future.will be protected将来时被动语态将来时被动语态6. Lily just told me Jack _ (fire) since last month.had been fired7. My homework _ when you arrive tomorrow.will ha

14、ve been finished过去完成时被动语态过去完成时被动语态将来完成时被动语态将来完成时被动语态Revision of the Passive Voice 时态一般时进行时完成时现在时现在时过去时过去时将来时将来时am / is / are doneam / is / are being done was / were doneshall / will be donewas / were being donehad been doneshall / will have been donehas / have been doneRevision of the Passive Voice

15、The basic composition of passive voice2. A rescue worker risked his life saving two tourists who _ (trap) in the mountains for two days.1. If Bob _ (offer) a job, is he willing to go to the remote town?is offered即学即用hadPractice3. My washing machine _ (repair) this week, so I have to wash my clothes

16、by hand.been trappedis being repaired即学即用Practice4. New art forms _ (introduce) at the end of the Qing dynasty. As a result, people lost interest in paper cutting.were introduced5. Most airports _ (build) far away from downtown, so it often takes passengers quite a long time to arrive.6. Before you

17、enter the Eiffel Tower, your bags _ (examine) by a security officer.are builtwill be examinedPractice即学即用7. Read and complete the passage with the present continuous passive voice of the verbs in brackets.It may seem that protecting wildlife is something far from the life of a high school student, b

18、ut in fact, a lot of work _ (do) by young people around the world. In Washington State, USA, wolverines (貂熊) _ (study) by scientists in an effort to learn how to preserve the population. However during the winter, it isis being doneare being studieddifficult to attract the animals to cameras hidden

19、in snowy forests. A group of students heard about the problem and created a special device which _ (test) deep in a snowy forest now. Their invention _ (use) to send out a certain smell near the cameras. The shy animals are attracted by the smell and coming around the cameras. They_ (observe) by a c

20、onservation researcher.Practiceis being testedis being usedare being observed Language points1due to2be concerned about3give a presentation4speak up for5Its high time to do6follow ones example7be released into8make sb aware ofImportant phrases (P18,68,69)为为辩护辩护; ;替替讲好话讲好话是该做是该做的时间了的时间了仿效某人仿效某人被释放到被释

21、放到使某人意识到使某人意识到由于由于对对担忧担忧介绍介绍Important sentences (P18)1. It is reported that spaces for wildlife are being reduced due to the cutting of the trees. 据报道，由于砍伐树木，野生动物生存的空间正在减少。l It is / was reported / said / hoped / believed that + + 从句从句是典型的是典型的被动语态被动语态的句型，其中的句型，其中it为形式主语为形式主语，that引引导的从句为真正的主语。导的从句为真正的

22、主语。l due to 因为；由于因为；由于。在句中可作表语、在句中可作表语、状语状语, , 与与owing to同义同义; ;作作状语时，一般不与其他成分隔开。状语时，一般不与其他成分隔开。Important sentences (P69)2. Visitors are being told to pay more attention to protecting the environment. 游客游客被告知要更加注意保护环境。被告知要更加注意保护环境。l pay attention to 中中to是介词，是介词，后面接名词、代词或动后面接名词、代词或动词词的的-ing形式。形式。l protect 保护保护 protect . from / against doing sth 使使免于（保护免于（保护）Homework