UNIT-3-COMPUTERS-公开课.ppt

1、What is it in English?,abacus,calculator,huge computer,PC (personal computer),laptop,PDA (personal digital assistant),robot,robots,robot,robot,What are they?,watering,playing,working,What is the robot doing?,Whats the next development of computers?,PDA,abacus,calculator,huge computer,PC,laptop,Whats

2、 next?,All the inventions tell us the_ of computers.,robot,development,Put them in an order according to the time when they appeared.,( ) universal machine,( ) laptop,( ) calculating machine,( ) robot,( ) PC,( ) analytical machine,Who am I?,Look at the pictures and the title of the reading passage o

3、n Page 18 and predict what it is going to be about.,_,It is about computers.,Fast reading:,1. Who am I?,A computer.,2. List the key words from the passage to support your idea.,calculating machine (L2),analytical machine (L5),universal machine (L13),PC and laptop (L16),Put them in an order according

4、 to the time when they appeared.,( ) universal machine,( ) laptop,( ) calculating machine,( ) robot,( ) PC,( ) analytical machine,1,2,3,4,5,6,The passage mainly tells us a short history of the development of the _ and its _ in different fields.,computer,applications,The computer had grown as large a

5、s a room.,The analytical machine was made by Charles Babbage.,The computer grew rapidly both in size and in brainpower.,1642,1822,1936,1940s,The computer began as a calculating machine.,1960s,The first family of computers was connected to each other.,1970s,Computers were used in offices and homes.,N

6、ow,Computers _ people all over the world together.,connect,From the timeline above, we can know that the passage is written in an order of _.,time,Para:,Over time I have been changed quite a lot.,(Charles Babbage),analytical machine,(simplify difficult sums),(solve any difficult mathematical problem

7、 ),(personal computer),calculating machine,universal machine,PC,laptop,(Alan Turing),These changes only became possible as my memory improved. memory(存储量) stored in:,tubes,transistors,small chips,network,What about my shape?,World Wide Web,Para II:,communication,space rockets,finance,trade,medical o

8、perations,robots,mobile phones,Since the 1970s, many new applications have been found for me.,Para III:,1. A topic sentence tells us _ _ of a paragraph. 2. A topic sentence is usually the _ or _ sentence of a paragraph.,Topic sentences,the main idea,first,last,: These changes only became possible as

9、 my memory improved.,Over time I have been changed quite a lot.,Para:,Since the 1970s, many new applications have been found for me.,Para III:,changes,Para II,memory,applications,function:,poor,strong,small,large,narrow,wide,size,large,small,Learning material P3 Step 2. Careful reading 2) Choose the

10、 best answers according to the text. ( ) (1)As a calculating machine, I A.worked very slowly B.could simplify difficult problems C.developed very fast D.was widely used all over the world,B,( ) (2)Where was my memory stored at first? A.In boxes. B.On transistors. C.On small chips. D.In tubes. ( ) (3

11、)Like an elephant, I . A.am very large B.am very strong C.have very good memories D.stand there by myself,D,C,What can we do on the Internet?,listen to music,read books and magazines,see movies,search for information,download music and films,send emails,go shopping online,play computer games,communi

12、cate with others by QQ,Discuss the disadvantages of computers.,1. Some young people are easily addicted to games. 2. Using computers too long is bad for our eyes and health. 3. The young will pay less attention to handwriting. 4. The young tend to be cheated. 5. There is unhealthy information on the

13、 net. 6. You may lose your private information.,How to avoid the disadvantages and make good use of a computer?,Do not tell others your private information. (telephone number and address) 2. Do not visit some unsafe websites. 3. Do not download some unknown files. 4. Do not use computers just for fu

14、n. 5. Do not spend too much time surfing on the internet.,Difficult sentences (1) 原句：I developed very slowly and it took nearly two years before I was built as an analytical machine by Charles Babbage. 分析：before conj. 在.之前，之后才，还没来得及就。 在此句中可译为：_ 全句译文：_,之后才,我发展缓慢，差不多过了两百年后，查尔斯.巴比奇才将我制作成了一台分析机。,拓展：It w

15、ill be long before. 要过很久才. It wont be long before 用不了多久就 It was long before. 过了很久才. It was not long before. 没过多久就.,( ) It _ long before we_the result of the experiment. A. will not be; will know B. is; will know C. will not be; know D. is; know,C,(2) 原句：After I was programmed by an operator who used

16、 cards with holes, I could think logically and produce an answer quiker than any person. 分析：who在句中引导_从句，修饰先行词 _, 在从句中充当_ 全句译文：_,定语,operator,主语,在操作员用穿孔卡为我设计程序后，我能够进行逻辑“思考”，并且能够比任何人更快地算出答案。,(3) Over time my memory has developed so much that, like an elephant, I never forget anything I have been told.

17、a) so that 意思是“如此以至于”，引导结果状语从句，so后须接形容词或副词。 so that引导的从句可表示结果或表示目的 He ran so fast that I could not catch up with him. He went early so that he got a good seat. He went early so that he could get a good seat,( ) She is _that we all want to make friends with her. A. a such kind girl B. such kind a gir

18、l C. so a kind girl D. so kind a girl,D,b) 句中I have been told在句中充当_, 是一个 _，省略了关系词_ , 关系词在从句中充当_ 全句译文：_ _,定语,定语从句,that,宾语,随着时间的推移，我的记忆能力发展得如此之快，就像一头大象一样，从来不会忘记告诉我的任何事情。,原句： Over time my memory has developed so much that, like an elephant, I never forget anything I have been told.,(4) But I was always so lonely standing there by myself, until in the early 1960s they gave me a family connected by a network. 非谓语动词的三种基本形式-doing, to do, done doing _ done