人教高中英语必修2Unit3-Warming-up-&-reading课件.ppt

1、 Unit 3 Computers Period 1 Warming upHeavy!Difficult!Hard!Tired!1.Easy!2.Fast!3.Free!keyboardmousemonitorscreenspeaker host computercameraWarming Up I am very old now.I was born in China.Many I am very old now.I was born in China.Many people used me for people used me for calculatingcalculating in t

2、he past,but now I in the past,but now I am a bit lonely because they dont like me now.am a bit lonely because they dont like me now.Do you know who I am?Do you know who I am?abacusGuessing Game:I am very small.I can be used for I am very small.I can be used for calculatingcalculating.In China,a lot

3、of students use me when.In China,a lot of students use me when solving solving mathematicalmathematical problems.problems.Do you know who I am?Do you know who I am?calculator A huge computerI am built to solve some mathematical problems.But I am too big.Do you know who I am?A PC personal computerI a

4、m the common computer which can solve all kinds of problems and is used widely now.Do you know who I am?I can I can be used forbe used for calculating.Besides,I can also calculating.Besides,I can also be used for watching DVD,sending e-mail and be used for watching DVD,sending e-mail and communicati

5、ng communicating through the Internet.However,I am through the Internet.However,I am not a PC,because Inot a PC,because Im small enough for you to take m small enough for you to take me with you.me with you.A notebook computer-laptopDo you know who I am?Do you know who I am?I can I can be used be us

6、ed as as a laptop,a laptop,h however,owever,I am not a I am not a laptoplaptop,because I,because Im m small enough for you to small enough for you to hold me in hold me in your handyour hand.Do you know who I am?Do you know who I am?PDA(personal digital assistant)(personal digital assistant)PDAabacu

7、scalculatorhuge computerPClaptopWhats next?Can you tell the development of computers?robotwork for us in Mars(火星火星)Whats next?carry thingswork in wars (战斗战斗)仿真机器人entertainment 娱乐娱乐What do you think will be the next development?Do you know in what ways computers are used today?Work out a list and com

8、pare it with your partner.search for see movieslisten to musicread books and magazinessend emails to friendsdownload music and filmsbuy things on lineplay games on the computerdraw pictureslook at photographs on the computeruse a computer for school worktake part in chat groupsReading:Who am I?Skimm

9、ing:Read and answer these questions:2.Who was the first person to invent the earliest computer?3.Who was the next important person to design computers?Charles BabbageAlan Turing1.Who am I?A computer.1642:1822:1936:1940s:1960s:1970s:Now:Scanning:The computer began as a calculating machine.the Analyti

10、cal Machine was built by Charles Babbage.The computer grew rapidly both in size and in brainpower.Computer had grown as large as a room.Computers were used in offices and homes.Computers connect people all over the world together.the first family of computers was connected to each other Complete the

11、 chart below.Para-graph 1Para-graph 2Para-graph 3Topic sentenceSupporting detailstubescommunica-tions financeScanningReading ComprehensionParagraph 1Topic sentenceOver time I have been changed quite a lot.Supporting details1 calculating machine2 analytical machine3 universal machine4 PC5 laptopParag

12、raph 2Topic sentenceThese changes only became possible as my memory improved.Supporting details1 tubes2 transistors3 chips4 network5 World Wide WebParagraph 3Topic sentenceSince the 1970s many new applications have been found for me.Supporting details1 communications 2 finance 3 trade4 robots 5 mobi

13、le phones6 medical operations7 space rockets8 providing a life of high qualityThe history of computersthe second generation (1956-1963)the third generation (1964-1971)the fourth generation (1971-)The first generation (1945-1956)The development of computers:Calculating machineAnalytical machineUniver

14、sal machineArtificial intelligenceComputerInternet计算器计算器分析机分析机万能机万能机,通用机器通用机器人工智能人工智能 Task 5:Cloze testto improve retelling ability I began as a _ _ in 1642 in France.In 1822 I was built as an _ _.Then in 1936 Alan Turing wrote a book and built a _ _.As time _ _,I was made_.These changes because my

15、_ _.In the 1960s they gave me a family_ _ _ _.Now people call it the World Wide Web.I have been _ _ _ _ since the 1970s.So I became PC.Im happy to become a devoted friend and helper of the human race.calculating machineanalytical machineuniversal machinewent byconnected by a networkused in offices a

16、nd homessmallermemory improved ReadingLanguage Points1.Over time my memory has developed so much that,.I never forget anything I have been told.考点考点 so.that.引导结果状语从句。引导结果状语从句。考例考例1 The weather was _ cold that I didnt like to leave my room.(2008 全国卷全国卷I)A.really B.such C.too D.so考例考例2 I havent seen A

17、nn for _ long that Ive forgotten what she looks like.(四川四川2008)A.such B.very C.so D.too点拨点拨 两题都考查两题都考查so.that.的用法。的用法。2.And my memory became so large that even I couldnt believe it!句型：句型：so that如此如此以致于以致于与与 tooto 句型的相互转换句型的相互转换And my memory became too large for me to believe it.eg He is so old that

18、he cant carry the box.He is too old to carry the box.此结构中的此结构中的that从句表示结果。从句表示结果。The stone is so heavy that no one can lift it.比较比较:so that 既可以表结果既可以表结果,也可以表目也可以表目的。的。so.that.结构的结构的so+形容词形容词/副词位于句副词位于句首时首时,句子用倒装结构。句子用倒装结构。So hard does he work that he seldom goes home.3.But I was always so lonely sta

19、nding there by myself,until in early 1960s they gave me a family connected by a network.点拨点拨 until表示表示“直到直到时时”，在肯定句，在肯定句中，指从开始到结束的整段时间，谓语动词中，指从开始到结束的整段时间，谓语动词一般是延续性的。在否定句中构成一般是延续性的。在否定句中构成not.until，意为，意为“直到直到才才”，指到某一点动，指到某一点动作才开始，谓语动词一般是非延续性的。其作才开始，谓语动词一般是非延续性的。其强调句是强调句是it is(was)not until.that.。当。当

20、not until位于句首时，句子要进行倒装。位于句首时，句子要进行倒装。如：如：The experts explored the island until the end of last year.直到去年年底，专家们一直都在勘查这个直到去年年底，专家们一直都在勘查这个小岛。小岛。We didnt solve the problem until Mr.Smith helped us.直到史密斯先生帮助我们，我们才解决了直到史密斯先生帮助我们，我们才解决了那个问题。那个问题。It was not until last year that my hope became a reality.Not

21、 until noon did it stop raining.4.I have also been put into robots and used to make mobile phones as well as help with medical operations.1)help(sb)with sth 协助协助(某人某人)做某事做某事e.g.A man is helping the police with their enquiries.有一男子在协助警方进行调查。有一男子在协助警方进行调查。2)as well as 也，还，而且也，还，而且e.g.He grows flowers

22、as well as vegetables.She is a talented musician as well as being a photographer.3)这个句子是现在完成时被动语态，其机这个句子是现在完成时被动语态，其机 构是构是(have/has+been+过去分词）过去分词）e.g.The radio has been repaired when we phoned the shop.考例考例1 Professor James will give us a lecture on the Western culture,but when and where _ yet.(浙江浙

23、江2007)A.hasnt been decided B.havent decided C.isnt being decided D.arent decided点拨点拨 本题考查动词的时态、语态及主谓本题考查动词的时态、语态及主谓一致。由一致。由yet可知要用完成时态，又因时间可知要用完成时态，又因时间与地点是被决定的，故应用被动语态。此与地点是被决定的，故应用被动语态。此外，外，“在什么时候和什么地点（做报告）在什么时候和什么地点（做报告）”是指同一件事，故用单数形式。是指同一件事，故用单数形式。考例考例3 I got caught in the rain and my suit _.(北京

24、北京2007)A.has ruined B.had ruined C.has been ruined D.had been ruined点拨点拨 句意为：我遭遇大雨，我的衣服句意为：我遭遇大雨，我的衣服被淋坏了。被淋坏了。ruin表示的动作发生在表示的动作发生在got caught 之后，故排除之后，故排除B、D两项。此处两项。此处表示被动，所以表示被动，所以C项正确。项正确。5.I am now truly filled with happiness that I am a devoted friend and helper of the human race!点拨点拨 that引导同位语从

25、句，具体说明引导同位语从句，具体说明happiness的内容。的内容。that是连词，在从句是连词，在从句中不充当任何成分。英语中用中不充当任何成分。英语中用that引导引导同位语从句的情况比较常见，但有时也同位语从句的情况比较常见，但有时也可以用连接副可以用连接副(代代)词词 how,when,where,whether等来引导同位语从句。注意：等来引导同位语从句。注意：if,which 不能引导同位语从句。不能引导同位语从句。如：如：I had the impression that she chose her words with care.在我的印象中，她选词很小心。在我的印象中，她选

26、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。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。我不知道他什么时候回来。He must answer the question whether he agrees to it or not.他必须回答他是否同意这样一个问题。他必须回答他是否同意这样一个问题。6.As time went by,I was made smaller.As连词的用法连词的用法 随着随着 =With time going by,当当

27、时候时候.当老师进来的时候，我们正在唱歌。当老师进来的时候，我们正在唱歌。e.g.As the teacher came,we were singing.因为因为As our parents take pains to work,we should spare no pains to study.as介词的用法介词的用法作为一名高中生，我们应该尊敬老师。作为一名高中生，我们应该尊敬老师。As a high school student,we should respect teachers.7.before的用法的用法基本用法基本用法 在在之前之前 我们到达之前，他已经离开了。He had le

28、ft before we arrived.用于肯定句中强调主句所表达的时间，距离长，用于肯定句中强调主句所表达的时间，距离长，或花费的精力大，译成或花费的精力大，译成“才才”We waited a long time before the train arrived.用于否定句中，强调主句所表达的时间，距离短，用于否定句中，强调主句所表达的时间，距离短，或花费的精力小，译成或花费的精力小，译成“不到不到就就”We hadnt run a mile before he felt tired.特殊用法特殊用法 还没来得就还没来得就 Before I could get in a word，he h

29、ad measured me.我还没来得及插话他就为我量好了尺寸。我还没来得及插话他就为我量好了尺寸。用于用于It+will(not)be+时间段时间段+before句型句型 1.肯定句意思是肯定句意思是“要过多长时间才要过多长时间才”；It will be two weeks before everything returns to normal.两周之后一切才能恢复正常。两周之后一切才能恢复正常。2.否定否定句句翻译成翻译成“用不了多久就用不了多久就 It wont be long before we meet again.用不了多久我们就会再见面的。用不了多久我们就会再见面的。用于用于I

30、t+was(not)be+时间段时间段+before句型句型 肯定句翻译成肯定句翻译成“多长时间之后才多长时间之后才”;It was some time before I realized the truth.过了很长一段时间我才了解到真相。过了很长一段时间我才了解到真相。否定否定句句翻译成翻译成“没过多久就没过多久就 It wasnt long before she became a brave solider.没过多久她就成了一名勇敢的战士。没过多久她就成了一名勇敢的战士。高考链接高考链接1.Scientists say it may be five or six years _ it i

31、s possible to test this medicine on human patients.A.since B.after C.before D.when 2.It was evening _ we reached the Jizhou county of Hengshui.A.that B.until C.since D.before 3.Several weeks had gone by _ I realized the painting was missing.A.as B.before C.since D.when8.By the 1940s I had grown as l

32、arge as a room.By+By+过去时间，谓语用过去完成时过去时间，谓语用过去完成时By+By+将来时间，谓语用将来完成时将来时间，谓语用将来完成时e.g.By the end of this month,we _(hold)the final examination.as large as和和一样大一样大 as+adj./adv.+asnot so(as)+adj./adv.+as翻译：翻译：1.杰克和玛丽一样高。杰克和玛丽一样高。Jack is as tall as Mary.2.杰克对我不如玛丽对我好。杰克对我不如玛丽对我好。Jack is not so/as kind to

33、me as Mary.will have heldI.用适当的介词填空。用适当的介词填空。1.I stayed awake one night _ myself to enjoy the beautiful moonlight.2._ time animals have developed many ways to stay away from their enemies.3.He has taken up photography _ a hobby.4.Leaves _ holes in them are signs that insects have been around.byOvera

34、swith5._ then on,Rick got up early every day and he was never late.6.Weve learned many kinds of languages _ the World Wide Web.7.Two girls jumped _ happiness on the sand.8.As time goes _,our life will improve greatly.Fromthrough/onwithby/onDevelop-mentEarly daysNameFunctionPoorStrongA _ machineSimpl

35、ify difficult sumsAn _ machineThink logically and produce an answer quicklyA _ machineSolve difficult _calculatinganalytical universal mathematical problemsDevelop-mentNetwork times_ stored inTubesLargeSmall_Small chips _Narrow WideFinance_RobotsMobile phones_Space rocketsMedical operations MemoryTr

36、ansistorsApplications CommunicationTradeIntensive reading:Underline the phrases&sentences that you think are importantStar sentences:P1 L2 I _instructions from cards with holes.P1 5 Earlier I was not very big,but then I became _.P1 L6 However,people thought I was _ until they _ I had“artificial inte

37、lligence.”我执行穿孔卡的指令我执行穿孔卡的指令早些时候我并不是很大，但是后来我变得非常大早些时候我并不是很大，但是后来我变得非常大可是，人们认为我头脑简单，可是，人们认为我头脑简单，直到发现我有人工智能时，直到发现我有人工智能时，他们才不那么想了。他们才不那么想了。followedhugesimple-mindeddiscoveredP1 L8 As the years have _,I have been made smaller and smaller.P2 L1 There were _ when my size was _changed.P2 L3 But I was alw

38、ays so lonely _ there by myself,until in the early 1960s,they gave me a family _ by a network.随着岁月的流逝，随着岁月的流逝，我被做得越来越小了我被做得越来越小了.有段时期我的体积完全变了有段时期我的体积完全变了但是我总是孤孤单单地站在那里，直到但是我总是孤孤单单地站在那里，直到60年代初，年代初，人们才人们才给了我一个用网络连接的家庭。给了我一个用网络连接的家庭。gone bytimestotally standingconnectedAdvantages and disadvantages of

39、the computers.Discussion Discussion advantages we cancommunicate with friends listen to the music see films&watch news play games do shopping save a lot of time do a lot of useful things DisadvantagesSome people especially the teenagers abandon(沉迷于沉迷于)themselves to the computer games and chatting on the Internet.As a result,they have little time to study.Some people use the computer wrongly.Homework1.Review the text2.Recite Para one3.Finish Ex.1/2 on Page 20.