人教高中英语必修二第三单元全部课件.ppt

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1、Unit 3,Unit 3 Computers,1. To know the history and development of computers2. To know the applications of computers3. To summarize the main idea and retell the passage,Heavy!Difficult! Hard!Tired!,Easy!Fast!Free!,monitor,keyboard,mouse,speaker,Name what you see in the pictures.,modem,scanner,printer

2、,USB flash disk,hard disk,Label each part.,monitor,screen,CD-ROM,mouse,keyboard,hard disk,I am very old now. I was born in China. Many people used me for calculating in the past, but now I am a bit lonely because they dont like me. Do you know who I am?,abacus,I am very small. I can be used for calc

3、ulating. In China, a lot of students use me when solving mathematical problems. Do you know who I am?,calculator,I am very big. Scientists use me to solve some mathematical problems.,huge computer,Do you know who I am?,PC Personal Computer,Im a small, relatively inexpensive computer designed for an

4、individual user. Im based on the microprocessor technology. At home, people use me to surf the Internet and play games. Do you know who I am?,I can be used for calculating. Besides, I can also be used for watching DVD, sending e-mail and communicating through the Internet. However, I am not a PC, be

5、cause Im small enough for you to carry anywhere. Do you know who I am?,laptop,PDA Personal Digital Assistant,I am so small in size that I can fit in your hand. My screen is slightly bigger than a digital phone, but smaller than the smallest laptop. Im a great way to store telephone numbers, access t

6、he Internet, make calculations, and so on. Do you know who I am?,robot,Im a machine that works automatically. I can do a wide variety of tasks, especially suitable for doing jobs too boring, difficult,or dangerous for human beings. Do you know who I am?,1. In pairs discuss what they have in common.

7、2. What do they tell you about the development of computers?3. What do you think will be the next development?,Whats next?,Computers have brought great changes to our life. Can we live without computers?,1. Look at the title of the reading passage. Predict what it is going to be about.2. Do you know

8、 in what ways computers are used today? Work out a list and compare it with your partners.,Read the text quickly.1. Who am I? A. An operator. B. Alan Turing. C. A computer. D. Human race.,C,2. Whats the passage about? The text mainly tells us a short history of the development of the _ and its _ in

9、different fields.,computer,applications,Read the passage and finish the timeline.,The computer began as a calculating machine.,The computer grew rapidly both in size and in brainpower.,1936,Computers had grown as large as a room.,1960s,Computers were used in offices and homes.,Computers connect peop

10、le all over the world together.,Read the passage again and complete the chart below.,calculating,analytical,universal,mathematical problems,Medical operations,Memory,Transistors,Applications,Communication,Trade,Over time I have been changed quite a lot.,Calculating machineAnalytical machineUniversal

11、 machinePClaptop,These changes only became possible as my memory improved.,tubestransistorschipsnetworkWorld Wide Web,Since the 1970s many new applications have been found for me.,communications financetrade robotsmobile phonesmedical operationsspace rocketsproviding a life of high quality,the secon

12、d generation (1956-1963),the third generation (1964-1971),the fourth generation (1971- ),The first generation (1945-1956),The history of computers,Summary of the passage.I began as a _ machine in 1642. It took nearly two hundred years _ I was built as an analytical machine. I became a “universal mac

13、hine” in 1936 to _ any mathematical problem. I was very big at one time. However, as time _ by, I was made smaller and smaller.,calculating,before,solve,went,I was given a family _ by a network in the early 1960s. I was able to _ my knowledge with others _ the World Wide Web. I have been widely used

14、 in many fields, such as in communication, _ trade and medical _. I have also been put into robots and space rockets to _ the Moon and Mars. Im glad I am a devoted friend and helper of the human race.,connected,share,through,finance,operations,explore,What is PC? Speak the name on the whole.,It mean

15、s: personal computer.,2. What is IT?,Information Technology.,3. What is W.W.W?,World Wide Web.,4. 科学技术,Science and technology.,5. 人工智能,Artificial intelligence.,6. 笔记本电脑,laptop,How have computers changed our lives?1. Brainstorm a list of things that you, your school and your family use computers for.

16、2. Think about what you would have to do if you could not use computers any more.,Retell the text according to the following clues and then write down your retelling.,Changes of the machine,Calculating machine,Analytical machine,Universal machine,Machine with artificial intelligence,Machine with new

17、 transistor,A family connected by a network,A family used by the Internet,Retell,Unit 3,Unit 3 Computers,To learn to use some words and expressions in the passage,1. I began as a calculating machine in France in l642 calculate v. to find the answer using numbers 计算，估计，算出,e.g. Let me calculate the co

18、st of the journey. 让我计算一下旅途的费用。 The scientists calculated when the spacecraft would reach the moon. 科学家推算出了宇宙飞船抵达月球的时间。,【拓展】calculable adj. 可计算的；可估计的calculated adj. 精心计划的calculation n. 计算；估计calculator n. 计算器,The loss has not yet been _ accurately, but it is believed to be well beyond a hundred milli

19、on dollars.,calculated,2. Although I was young I could simplify difficult sums. simplify vt. to make things easier 使简化 e.g. Simplify the instructions so that children can understand them. The application forms have now been simplified.,【拓展】后缀-fy加在一些形容词或名词后面意思为“to make (使成为；使.化）”。 -fy与以辅音结尾的词基之间，往往需要

20、添加字母i或e,由e结尾的词则往往变e为i，所以也可以把-ify或-efy看成-fy的异体。 e.g. classify class n. 等级，种类；-ify “使化成 等级或种类” vt. 把.分等级；把.分类 Employees in the post office classify mail according to the place where it is to go. 邮局的职员根据邮件的目的地进行分拣工 作。,beautify vt.美化；装饰 Flowers beautify a room. 花能美化房间。,3. I could be made to work as a “u

21、niversal machine” to solve any difficult mathematical problem. solve vt. to work out the answer to a problem 解答，解决 e.g. The expert cannot solve this difficult problem. Talk to me about whatever is troubling you. Ill help you solve it.,The clever child solved the riddle quickly.,solve后跟_或_作宾语。【拓展】 so

22、lution n. 解答，解决办法e.g. Theres no simple solution to this problem.,名词,代词,【运用】翻译下列句子。1) Just calm down shouting wont solve anything! 2) 我们找不出解决这个问题的办法。,冷静些喊叫解决不了任何问题！,We cant find a solution to this problem.,4. As a result I totally changed my shape. as a result为副词短语，后接句子。e.g. He runs every day. As a r

23、esult, he has lost weight.As a result of为介词短语，相当于because of, 后接名词或名词短语。e.g. Mary was late as a result of the snow.,as a result of . 意为“由于的结果”，后跟名词或代词。e.g. Mary was late as a result of the snow.,【拓展】,【运用】选用以上合适的短语完成下列句子。1) Jackson couldnt work any longer _ the car accident. 2) We helped each other in

24、 studies, and _ we became good friends.,as a result,as a result of,totally adv. completely 整个地; 完全地total adj. 完全的; 整个的e.g. totally blind 全盲 total silence 寂静无声 in total 总共,5. I have even been put into space rockets and sent to explore the Moon and Mars. explore v. to travel around an area to find out

25、 about it 探索；探测；探究 e.g. They explored the land to the south of the Murray river.,给出explore的中文意思。1) As soon as we arrived on the island, we were eager to explore.2) Kates father works in a company exploring for oil.3) We must explore all possible ways to increase food production.4) Lets explore this

26、idea more fully.,考察，勘探,勘探,探索,探讨,【拓展】 explorer n. 勘探者，考察者，探险者；exploration n. 勘探，探索，研究,【运用】翻译下列句子。1) It is worth exploring other ways of dealing with this problem.2) 你真的考察了离你们那儿最近的城 镇？,其他处理这个问题的方法值得探讨一下。,Have you really explored your nearest town?,6. Anyhow, my goal is to provide humans with a life of

27、 high quality. anyhow adv. anyway 无论如何；不管怎样；即使如此 e.g. That wasnt my fault anyhow. 反正那不是我的过错。 I dont know if it was lost or stolen, anyhow, its gone. 我不知道它是丢了还是被偷了，不管 怎么说，它不见了。,I dont think they need help, but I think I should offer anyhow.我认为他们无需帮助，不过我想我应有所表示。,1) 房子锁着, 我无论如何也进不去。2) 不管怎样, 我们设法得到了我们想要

28、的。,The house is locked and I cannot get in anyhow.,We managed to get what we wanted, anyhow.,goal n. 球门；进球得分；目的，目标【运用】根据句意，写出goal的汉语意思。 1) I wish I could achieve my goal of writing 2,000 poems.2) He kicked the ball towards the other teams goal.3) Their team beat us by three goals to one.,目的，目标,球门,进球

29、得分,1. have . in common 2. compare it with your partner3. put them in an order 4. according to the time5. a calculating machine 6. an analytical machine7. a technological revolution 8. artificial intelligence9. be made to work,10. from then on 11. grow rapidly in size 12. as large as a room 13. as ti

30、me goes by 14. as a result 15. over time 16. share my knowledge with others17. as well as 18. help with medical operations19. explore the Moon 20. a life of high quality21. be filled with happiness 22. the human race,_ complete change in ways of thinking, working, etc. _ connected computer system _

31、to make things easier _ to find the answer using numbers,revolution,network,simplify,calculate,Find the word or expression for each of the following meanings from the text.,5. _ can be moved easily from place to place6. _ to work out the answer to a problem7. _ to travel around an area to find out a

32、bout it8. _ completely9. _ anyway10. _ activity of managing money,mobile,solve,explore,totally,anyhow,finance,I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage. (翻译) 我发展缓慢，差不多两百年之后，查尔斯巴比奇才把我制成了一台分析机。 【分析】该句是一个由and连接的并列复合句。and前

33、的分句是一个简单句。and后的分句的结构是：it took . before .。before引导_从句。,时间状语,【仿写】过了两年我们才又见了一次面。_,It took two years before we saw each other again.,2. By the 1940s I had grown as large as a room, and I wondered if I would grow any larger. (翻译) 到二十世纪四十年代，我已经长得像一间屋子那么大，我不知道是否还会长得更大。 【分析】这是一个由and连接的并列复合句。 and前的分句是一个简单句。a

34、nd后的分句中，wondered后跟if引导的_从句。,宾语,I wonder if .是一个常用句型，意为“我想/不知道是否”。如：As time went on, Mary began to wonder if / whether John had forgotten their date.,【仿写】到去年年底，已经有十座高达百米的大楼在这个小镇建成，我不知道这里是否还会建造更多高楼。 _,By the end of last year ten tall buildings as high as 100 metres had been built in this small town, a

35、nd I wondered if more tall buildings would be built here.,3. Over time my memory has developed so much that, like an elephant, I never forget anything I have been told! (翻译) 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，我从来不会忘记告诉我的任何事情！ 【分析】此句中包含一个由 _引导的结果状语从句，在该从句中又包含一个省略了关系代词_的定语从句：I have been told, 修饰先行词_。,anyt

36、hing,so . that,that,【仿写】 他在这么短的时间里做了这么多，几乎每个人都认为这是个奇迹。He has done so much in _ almost everyone thinks that it is a miracle.,so short a time that,4. And my memory became so large that even I couldnt believe it!,句型: so that 如此 以致于,与too to 句型可相互转换,And my memory became too large for me to believe it.,e.

37、g. He is so old that he cant carry the box. He is too old to carry the box.,此结构中的that从句表示结果。e.g. The stone is so heavy that no one can lift it.,so . that .结构的so+形容词/副词位于句首时, 句子用倒装结构。e.g. So hard does he work that he seldom goes home.,so that既可以表结果, 也可以表目的。,5. But I was always so lonely standing ther

38、e by myself, until in the early 1960s they gave me a family connected by a network. 【翻译】但是我总是孤孤单单地站在那里，直到二十世纪六十年代初，人们才给了我一个用网络联成的家庭。 【分析】本句是一个复合句。主句为I was always so lonely standing there by myself，其中standing there by myself 是动词-ing形式短语作状语；,从句是由_引导的时间状语从句，其中connected by a network是过去分词短语作后置定语，修饰_。,fam

39、ily,until,【仿写】我总是步行上学，直到上个月，爸爸才给我买了一辆电动自行车。_,I always went to school on foot, until last month my father bought me a bicycle powered by electricity.,6. I am now truly filled with happiness that I am a devoted friend and helper of the human race!,that引导同位语从句，具体说明 happiness的内容。that是连词，在从句中不充当任何成分。英语中用

40、that引导同位语从句的情况比较常见，但有时也可以用连接副(代)词how, when, where, whether等来引导同位语从句。,注意：if, which不能引导同位语从句。,e.g. I had the impression that she chose her words with care. 在我的印象中，她选词很小心。 I heard the news that our team had won. 我听到了我们队获胜的消息。 l have no idea when he will be back. 我不知道他什么时候回来。 He must answer the question

41、 whether he agrees to it or not. 他必须回答他是否同意这样一个问题。,artificial technology intelligent applications explore Web reality logically,Complete the passage with the words below.,When my brother was is high school, he was very interested in computers and enjoyed writing programs of his own.,He used to downl

42、oad information from the Internet and made good use of it. He liked to _ the World Wide _ and used the Internet to communicate with computer programmers all over the world. When he went to university he studied IT (information _) and developed a special interest in _ intelligence.,explore,Web,techno

43、logy,artificial,artificial technology intelligent applications explore Web reality logically,After developing special _ of the computer, he hopes to design an _ robot which can think _ and look like a human being, but in _ he has a long way to go.,applications,intelligent,reality,logically,artificia

44、l technology intelligent applications explore Web reality logically,Read the story below and then use the outline to create one of your own.,My story When I was young I was crazy about radios.At the time my interest began, I was playing with radios at home.Over time I decided to build my own radio.,

45、As time went by I did research into how to make my radio.By the time I was sixteen, my dream had come true. I made my own radio.As a result I became interested in electronics and computers.From then on I worked hard to get into university.,Now I am working in a computer company designing new program

46、s for computers.As I grow older I realize how much my life has been connected with my interest in radios!,I. 根据下面各句句意以及所给单词的首字母或汉语提示词，写出该单词的正确形式（每空一词）。1. Alex has sent off _ (申请) for four different jobs. 2. The company spent a lot of money on new _ (科技). 3. The footballer scored three g_ and his tea

47、m finally won the game.,applications,technology,goals,4. He works hard to s_ the mystery of the planes disappearance. 5. As soon as we arrived on the island we were eager to _ (探索). 6. The door was locked. We couldnt get into the room _ (无论如何).,solve,explore,anyhow/ anyway,II. 用括号内单词的正确形式填空。1. As a

48、lawyer, she must be able to argue _ (logical). 2. John showed high _ (intelligent) from an early age. 3. Having suffered a lot, she finally achieved real _ (happy). 4. He tried to _ (simple) the story for the younger audience.,logically,intelligence,happiness,simplify,5. Its like learning a(n) _ (to

49、tal) new language. Its too difficult. 6. You can disagree about them, but _ (personal), I think they are great ideas that have made people think.,totally,personally,III. 根据括号内的汉语提示补全下面句子（每 空一词）。1. _ _ _ (从现在开始), Ill be more careful about what I eat. 2. There was nothing on TV. _ _ _ (结果), I decided

50、to go to bed. 3. _ _ _ _ (据 他叔叔说), Roy has a great gift for music.,From now on,As a result,According to his uncle,4. Although they _ _ _ _ (毫无共同之处), they can still get on well with each other. 5. In the beginning he wasnt very interested in maths, but _ _ _ _ (随着时间的推移) he began to enjoy it. 6. Mary