Unit 3 Computers

课件18张PPT。Aims:
1. Learn about the development of computers.
2. Improve the skills of reading .
3. Grasp the structure of passive voice of the present perfect tense.
Difficult points:
1. Words related to the development of
computers.
2. The structure of the tense.1.calculator
2.simplify
3. personally
4. tube
5.total
6.application
7.network
8.finance
9.mobile
10.rocket
.
1.计算器
2.简化
3.就个人而言
4.电子管
5.总数
6.应用， 申请
7.网
8.金融，财政
9.可移动的
10.火箭
Words and Expressions
1.analytical machine
2.universal machine
3.calculating machine
4.laptop
5.chip
6.transistor
7.artificial intelligence
8.technological revolution
1.分析机
2.通用机
3.计算器
4.手提电脑
5.芯片
6.晶体管
7.人工智能
8.科技革命keyboardmousemonitorscreenspeaker host computerTell the name of each partan abacusa calculatora desktopa notebook computer
a laptopPalmtop Huge computer(What do they have in common?)1.They can be used for calculating.
2.They can deal with
maths problems.
3.They are useful and helpful.DiscussionReading:
Who am I?Guessing:
Look at the title of the passage on P18 and the two pictures and then guess 1.“who am I ”
2.the main idea of the passage. I am a computerThe and of a computer. historydevelopment Find the topic sentence of each paragraph.Para.1
Para.2
Para.3Over time I have changed a lot.These changes only became
possible as my memory improved.Since the 1970s many new
applications have been found for me.Careful reading:
1. The development of computers （ Para.1）calculating machineanalytical machine PC(In 1642)(In 1822)(in 1936)laptop artificial intelligenceuniversal
machine
Para 2. How did the memory improve?
1. tubes 2.3.4.5.transistorschipsnetworkWorld Wide Web Para 3.
What are the new applications since the 1970s?
1. in communication
2.
3.
4.
5.
6.
7.
in financein tradein robotsin making mobile phonesin helping with medical operationsin space rocketsCalculating machineComputerInternet
Analytical machineArtificial intelligenceUniversal machineSummary:
Put the development of computers
in correct order(排序):124356How did the computer change in the following aspects(方面)?
1. size:

2. intelligence:
3. speed:
4. fun_ction:
（功能）
5. memory:smallerQuicker/ fasterCleverer/ smartermore functions, more convenient, more usefullargerDiscussion
1. What do people use computers to do in our life?
2. Should we entirely/totally depend on computers? Why or why not? In our life:
1. communicate with friends online
2. listen to music
3. see films and look through news
4. play games
5. do shopping
6. download useful materialsOur life has changed!Difficult sentences:
1.Over time I have been changed a lot.
(line 1)
2. I have been used in homes and offices
since the 1970s.(line 17)
3. I never forget anything I have been told.
(line 21)
4. Since the 1970s many new applications
have been found for me.(line 25)
Do exercise 2 on page 215. By the 1940s I had grown as large as a
room.
1）By the time we got there, the bus _______.
(leave)
2）The project ________________(complete) by
the end of 1990.
had lefthad been completedby +过去时间，句子用过去完成
3）We ______________(learn)1000 words by the end of this term.
4) We ________________(complete) the task by the end of this year.
will have completedwill have learnedby +将来时间，句子用将来完成