课本book2unit3单元课件.ppt

1、Unit 3 Computers,A has something to do with B A has nothing to do with B,compare A with B A is compared with B Compared with A, B,Read the whole passage as fast as you can. Try to get the main idea of this passage . Find out the topic sentence of each paragraph and underline them,skimming,The topic

2、sentence of each paragraph,skimming,Para 1 Para 2 Para 3,Over time I have been changed a lot,Those changes only became possible as memory improved,Since 1970s many new applications have been found out for me,Choose the main idea of this passage,skimming,The computer wants to find “who he is”. B. The

3、 function(功能) of the computer. C. The computer becomes popular around the world. D. The history and the applications of the computer,Scanning: Para1,Fill in the chart with the information in para 1,1822,calculating,Simplify,logically,universal,Used in offices and homes,Since the 1970s,Reality,began

4、as calculating machine simplify difficult sums it took hundred years analytical machine was programmed by think logically it was considered a technological revolution artificial intelligence,work as universal machine solve mathematical problem from then on grew rapidly in size and in brainpower as l

5、arge as worry my designers as time went by,underline,Scanning: Para2,My shape didnt change even though my memory improved. The older I am, the larger I have become. Over time I have been very easy to forget things because I dont develop enough memory. I was able to share my knowledge with others thr

6、ough the World Wide Web in the early 1960s,T or F Questions,F,F,F,T,The information was stored in tubes, then on transistors and later on the chips,I was given a family connected by a network,The size has no nothing to do with the age,My memory became so large, like an elephant, that I never forget

7、anything I have been told,was stored in on transistors on small chips as a result so much that lonely connected by a network,underline,Scanning: Para3,What are the new applications of the computer? What role do computers play in the life of human being,The supporting details of the topic sentence,Sc

8、anning: Para3,What are the new applications of the computer,Communication,Finance,mobile phones,Trade,medical operation,space rockets,robots,What role do computers play in the life of human being,Scanning: Para3,They provide humans with a life of high quality. They are devoted friends and helpers of

9、 the human race,Questions and Answers,new applications finance and trade be used to make mobile phones explore the moon anyhow a life of high quality be filled with a devoted friend,underline,Comprehending part I,1642,1822,1936,1940s,1970s,now,A calculating machine,A analytical machine,A universal m

10、achine,_computer, Laptop,Large computers,A devoted friend and helper of _,_difficult sums,Think _,Solve any problem,_worries designers Tubes transistors chips,_,Simplify,logically,Reality,Personal,Applications,human race,1960s,Network,Share the knowledge through web,Part II,Calculating machine Analy

11、tical machine Pc laptop,Tubes Transistors Chips Network Word wide web,Trade Robots Mobile phone Medical operations Rocket,Our use of computers,The computer is a wonderful machine. They are already widely used in industries and in universities. They are used in many ways. Computers can do many kinds

12、of work. For example, computers can helps us do maths problems quickly. Some problems are too hard for us to work them out, but computers can. A scientist can ask computers some questions, and the computers can answer on the screen.In a car-factory computer tells the robots how to do with the cars.

13、Computers are very useful. So many parents buy computers for their children. They hope computers can help them improve their studies in school, but some children dont do what parents want them to do. Because they use the computers for surfing on the Internet and spend too much time playing computer

14、games instead of learning. It does harm to their eyesight. So their parents complain that computers do not help children to study but also make them fall behind,In many companies computers replace workers to work. So many people lose their jobs. So many workers think computers bring them a lot of tr

15、ouble. If computers are good for us or bad for us its hard to say. So I hope computers will be used in the right way,revolution network simplify calculate mobile solve explore totally anyhow finance,Learning about language,explore Web technology artificial applications intelligent logically reality,

16、Learning about language,Learning about Language,The Present Perfect Passive Voice,现在完成时的被动语态,Lead-in,Are you familiar with these computers? Can you call them,palmtop,laptop/ notebook,desktop PC,WW PC wrist-worn/wearable PC,A wrist-worn PC has been invented recently,A pen-like computer has already be

17、en developed,1.As the year have gone by, I have been made smaller and smaller. 2. A wrist-worn PC has been invented recently. 3. Many new buildings have been built in TianTai since 1990. 4. A new library has already been built in TianTai High school. 5.The houses have been destroyed by the storm. 6.

18、Several soldiers have already been killed in the conflict,Do the underlined parts have something in common,Discovering,1构成： 主动语态 被动语态 现在完成时 have/has done He has been sent to study the new technology in the company. The dirty clothes have not been washed. Have the windows been cleaned? How many shopp

19、ing centers have been built in this city,The Present Perfect Passive Voice （现在完成时的被动语态,have/has been done,Learning the structure,2. 只有及物动词才有被动语态，不及物动词 （词组）没有被动语态, 如:happen, take place, die, appear, disappear, fail, remain, lie, last, sit , stand, break out, come true, belong to等如： What has happened

20、to your brother? 3但许多不及物动词加介词或副词构成的短语 动词，相当于及物 动词，也可以有被动语态。 但短语动词是一个不可分割的整体，变为被动 语态时，不可丢掉构成短语的介词或副词。如： eg 1) The child has been taken good care of by Grandma Wang all these years. A notice has been put up on the wall,Example: I have read this book many times. This book has been read many times,1. We

21、 have completed all the preparations for the task, and were ready to start. 2. This company has produced new types of computers. 3. They have interviewed several teachers for the job. 4. George has sent some texts and pictures to his friends cellphone. 5. They have developed some programmes for the

22、human resource department of their company,1 . Change the following sentences into the Present Perfect Passive Voice,Practice,2 . Change the following sentences into the Present Perfect Passive Voice. Put the verbs into correct form,Recently we have bought a new personal computer. We have used the c

23、omputer every day since we bought it. We have just joined our computer to the Internet. However, we have found many problems with it. So we have decided to ask a professional man to fix it. Soon he has fixed the computer. He has built a PC way we wanted . How excited we are! These days we have writt

24、en a lot of E-mails on the computer. We have decided to write a report about the positive and the negative effects of using computers,Whats happening in the new area? -New houses_ recently over there. are built B. built C. have built D. have been built 2. This is a photo of the power station that_ i

25、n my hometown . A. has set up B. has been set up C. was set up D. is set up 3. There is a police car in front of our neighbors house. What do you suppose _? A. did happen B. has happened C. is happen D. has been happened,D,B,B,Exercises : Choose the best answers,1. -How long _ at this job? - Since 1

26、990. A. were you employed B. have you been employed C. had you been employed D. will you be employed 2.When and where to go for the on-salary holiday _yet. (2003 上海春季) A. are not decided B. have not been decided C. is not being decided D. has not been decided 3. All the preparations for the task_, a

27、nd were ready to start. (2000 北京春季) completed B. complete C. had been completed D. have been completed,B,D,高考链接,D,5. Every possible means _ to prevent the air pollution, but the sky is still not clear. is used B. are used C. has been used D. have been used 6. No permission _ for anyone to enter the

28、Building. has been given B. has given C.has to give D. has been giving 7. The police found that the house _ and a lot of things _. has broken into; has been stolen had broken into; had been stolen has been broken into; stolen had been broken into; stolen,C,A,D,8. All the preparations for the project

29、 _, And were ready to start. completed B. had been completed C. complete D. have been completed 9. Great changes _ in the city , and a lot of factories _. have been taken place ; have been set up B. have taken place; have been set up C. have taken place; have set up D. were taken place; were set up

30、10.The book _ under the bench for two days. has put B has been lying C. has been put D. has been laid,D,B,B,Andy-The Android,Skimming Fill in the file for Andy, please,Name,Appearance,Size,Character,Ability,Job,Andy,looks like a human,as big as a human,competitive and full of team spirit,move and th

31、ink like a human,a striker,an android football team are allowed to get together to look like i m a striker computer chips signal to my teammates to in computer language i am open have a good shot,underline,won second place develop a new type of program improve our intelligence are determined to in a

32、 way our programmer is like our coach program us moves a new situation arises play against with the help of my electric brain using my intelligence is what im all about,underline,My android,would like to this means that clean the house mop the floors deal with telephones calls watch over my naughty

33、niece look after be programmed to do make mistakes in that way spoil my free time,underline,floppy disc chips monitor modem dvd-rom scanner keyboard printer,软碟 芯片 监视器 调制解调器 光驱 扫描仪 键盘 打印机,personally electronic types download logically arise possibility virus appearance,1.Ben loves football and his gr

34、eatest happiness is when he scores a goal. 2.With the help of a computer, you will not find it hard to deal with and share information. 3.Jack failed his exams last term and from then on his parents stopped him playing computer games. 4.I dont like to watch over my naughty niece every weekend, but my mother insists that I