Unit 3 ComputersLearning About LanguageThe history of computersthe second generation (1956-1963)the third generation (1964-1971)the fourth generation (1971- )The first generation (1945-1956)calculatincalculating machineg machinePc(desktopPc(desktop/notebook)/notebook)analytical machineuniversal machineartificial intelligenceInternet. Listen, Read and TalkRevision .Translation:1. 依你们看 , 我该怎么办 ?2. 他们无共同之处 .3. 他是一个头脑简单的人 .4. 他跑得太快 , 我赶不上他 .In your opinion, what should I do?They have nothing in common.He is a simple—minded man.He ran so fast that I couldn’t catch up with him.5. 你将怎样处理这场车祸 ?How will you deal with the car accident?PresentationActive voice or Passive voice?1.The old man has been dead for two years.2.They have done the job.3.The house has been built for 3 years.Passive Voice---------------现在完成时被动语态谓语 : has/have+been+past participleGrammarHow? *They have read 20 books. -------20 books______have been readby them. 方法找宾作主 ,看时定式*I have bought a car .A carhas been bought(by me)Please do the following: Active voice Passive voice1.We have bought a new personal computer.2.We have found many problems with our new computer.3.They have built a PC the way we wanted.A new personal computer has been bought by usMany problems have been found with our new computer.A PC has been built the way we wanted. 4.They have just joined our computer to the Internet.5.We have used the computer every day since we bought it. 6.We have written a lot of e-mails on the computer in the past year.A lot of e-mails have been written on the computer in the past year.Our computer has just been joined to the Internet.The computer has been used every day since we bought it.Choice1.You can s...
