UNIT-3-COMPUTERS-公開(kāi)課.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(存儲(chǔ)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，還沒(méi)來(lái)得及就。 在此句中可譯為：_ 全句譯文：_,之后才,我發(fā)展緩慢，差不多過(guò)了兩百年后，查爾斯.巴比奇才將我制作成了一臺(tái)分析機(jī)。,拓展：It w

15、ill be long before. 要過(guò)很久才. It wont be long before 用不了多久就 It was long before. 過(guò)了很久才. It was not long before. 沒(méi)過(guò)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在句中引導(dǎo)_從句，修飾先行詞 _, 在從句中充當(dāng)_ 全句譯文：_,定語(yǔ),operator,主語(yǔ),在操作員用穿孔卡為我設(shè)計(jì)程序后，我能夠進(jìn)行邏輯“思考”，并且能夠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”，引導(dǎo)結(jié)果狀語(yǔ)從句，so后須接形容詞或副詞。 so that引導(dǎo)的從句可表示結(jié)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在句中充當(dāng)_, 是一個(gè) _，省略了關(guān)系詞_ , 關(guān)系詞在從句中充當(dāng)_ 全句譯文：_ _,定語(yǔ),定語(yǔ)從句,that,賓語(yǔ),隨著時(shí)間的推移，我的記憶能力發(fā)展得如此之快，就像一頭大象一樣，從來(lái)不會(huì)忘記告訴我的任何事情。,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. 非謂語(yǔ)動(dòng)詞的三種基本形式-doing, to do, done doing _ done