Unit 3 Using Language Present perfect passiveppt课件 -2022高中英语新外研版必修第三册.pptx

1、 This part of the seabed has been explored many times.The problem has not been solved up to now.肯定式：肯定式：have/has been done否定式：否定式：have/has not been donealready，yet，just，never，recentlyp The room has already been cleaned.房间已经被清扫干净了。房间已经被清扫干净了。(已不用清扫房间了已不用清扫房间了)p The doctor hasnt been sent for yet.还没有派

2、人去请医生。还没有派人去请医生。(应派人去请医生应派人去请医生)p Recently the price of TV sets has been cut.近来电视机降价了。近来电视机降价了。(电视机现在的价格比以前低了电视机现在的价格比以前低了)常与常与for或或since等引导的时间状语等引导的时间状语连用，连用，p The machine has been repaired for two hours.这台机器已修了两小时了。这台机器已修了两小时了。p(2019全国卷全国卷)Modern methods of tracking polar bear populations have bee

3、n employed only since the mid1980s.追踪北极熊数量的现代方法自从追踪北极熊数量的现代方法自从20世世纪纪80年代中期才被采用。年代中期才被采用。1.现在完成时的被动与一般过去时的被动的区别：现在完成时的被动与一般过去时的被动的区别：一个被动的动作发生在过去一个被动的动作发生在过去某个时候，某个时候，其结果对现在没有影响其结果对现在没有影响；：动作或状态尽管发生在过去，动作或状态尽管发生在过去，但侧重说明但侧重说明该动作或状态对现在造成的影响和结果该动作或状态对现在造成的影响和结果。2.finish，buy，start，begin，return，borrow，j

4、oin，marry，open等等的现在完成时的被动语的现在完成时的被动语态态(如如for four days，how long等等)，若连用则需要更换动词或，若连用则需要更换动词或时态。但这类动词的否定式可表示动作的持续过程，时态。但这类动词的否定式可表示动作的持续过程，具有延续性，因而可与具有延续性，因而可与since或或for引导的时间状语连引导的时间状语连用。用。3.短语动词是一个不可分割的整体，在被动结构中要保短语动词是一个不可分割的整体，在被动结构中要保持完整性，持完整性，不可省略短语动词中的介词或副词不可省略短语动词中的介词或副词。p The orphan has been wel

5、l looked after.Practice1.Their new cars _(advertise)on the Internet for a long time.2.A new library and a gymnasium in our school _(set)up so far and they will be put into use very soon.3.A great many machines _(produce)by the factory since the technological revolution.4.Every possible means _(try)t

6、o save the wounded soldier up to now.have been advertisedhave been producedhas been triedhave been setPractice5.Great changes _(take)place in my hometown and a lot of factories _(set)up in the past ten years.have takenhave been setRewrite the underlined parts using the present perfect passive.p Many

7、 things in our lives have already been affected.p 3D-printed hamburgers have been served to customers in some restaurants in London.p But perhaps the most significant success that has been achieved to date is in medicine.p Human body parts,including a beating heart,have been made with 3D printing te

8、chnology.p A new 3D-printed shell has been given to a turtle injured in a forest fire.Within the next 80 years,our lives may be changed beyond recognition by 3D printing.It has already affected many things in our lives,right down to the food we eat.For instance,some restaurants in London have served

9、 3D-printed hamburgers to customers.But perhaps the most significant success that people have achieved to date is in medicine.They have made human body parts,including a beating heart,with 3D printing technology.And it is not just humans who are benefiting in Brazil,people have given a new 3D-printe

10、d shell to a turtle injured in a forest fire!1.If she told the truth,the whole class would find out and accuse her of cheating.accuse sb.of sth.控告某人某事控告某人某事 inform sb.of sth.告知某人某事告知某人某事2.look down on/upon 轻视，瞧不起轻视，瞧不起 look up 抬头看，查阅抬头看，查阅 look back on 回忆，回顾回忆，回顾 look out(for)注意，留意，留神注意，留意，留神 look t

11、hrough 浏览，仔细查看浏览，仔细查看Imagine you are Dr Moore.Look at the pictures and tell the police about the damage and loss to your lab.Use the present perfect passive where appropriate点击添加标题0 2There are many variations of passages of Lorem Ipsum available,but the majority have suffered alteration some form,by

12、 injected humour,or randomThere areLook at the pictures and answer the questions.1.What do you know about these careers?2.What famous scientists can you name in these fields?A mathematician is a person who is trained in the study of numbers and calculations.A physicist is a person who does research

13、connected with physics or who studies physics.An astronomer is a scientist who studies the stars,planets,and other natural objects in space.A chemist is a person who does research connected with chemistry or who studies chemistry.A biologist is a person who studies or works in the field of biology.A

14、 geographer is a scientist who studies the geography or is an expert in it.Complete the introductions about different scientists with the words in Activity 4.Pay attention to the language that describes their careers.Guo Shoujing(1231-1316)was a famous Chinese 1_ of the Yuan dynasty.He invented twel

15、ve new instruments to study stars and planets.He also developed a calendar which is as accurate as the Gregorian calendar.A mountain on the Moon and a minor planet are named after him.astronomerBritish 2_Charles Darwin(18091882)is best known for his work On the Origin of Species,in which he explains

16、 changes in species due to natural selection.His ideas deeply influenced our understanding of the relationship between humans and nature.biologistLi Daoyuan was a famous writer and 3_ of the Northern Wei Dynasty.He did field research across China and studied more than a thousand rivers and streams,a

17、long with the landscape,history and culture of the surrounding areas.geographerMarie Curie(18671934)was a world-famous 4_,and was first awarded the Nobel Prize in 1903 for her extraordinary work on radioactivity.She was also regarded as a brilliant 5_ and was again awarded the Nobel Prize in 1911 fo

18、r the isolation of pure radium.physicist chemistChen Jingrun(19331996)was one of the worlds leading 6_.His work on Chens Theorem made an important advance towards proving Goldbachs Conjecture,the greatest unsolved problem in number theory.mathematicians mathematiciansListen to conversation and numbe

19、r the pictures in the correct order.Picture a:Conversation 4Picture b:Conversation 2Picture c:Conversation 1Picture d:Conversation 3Picture e:Conversation 5Listen again and complete the notes.1.a pair of socks designed for people with Alzheimers disease.2.a student from New York3.His grandfather4.A warning5.gets out of bedThank you!