学案设计 2018学年度人教版必修Unit 3ComputersPeriod 2Language points专题学案设计学习目标1.了解电脑的发展历史,掌握与电脑有关的科技词汇。2.全面培养学生的阅读能力,重点培养概括段落大意和理解文章主旨大意的能力。3.理解并熟练掌握下列重点句型和结构的用法。(1)Over time I have been changed quite a lot.(2)I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage.(3)As a result I totally changed my shape.自主预习Guess who I am?Its a long history.I began as a calculating machine.Over time I was built as an analytical machine by Charles Babbage.From then on,I grew rapidly both in size and in brainpower.As time went by,I was made smaller.First as a PC.Then as a laptop.As a result my memory became so large that even I couldnt believe it!I am a computer!思考导引As we can see from the pictures,computers have developed fast lately,so are you interested in exploring more detailed information?课堂探究Step 1Reading1.SkimmingA.Read the text quickly and try to find out the topic sentence for each paragraph.Matching work:Topic sentencesParagraphs1.These changes only became possible as my memory improved.Paragraph 12.Since the 1970s many new applications have been found for me.Paragraph 23.Over time I have been changed quite a lot.Paragraph 32.ScanningDraw the timeline(时光轴)and find the relevant(相关的)events. The computer began as a calculating machine.1822 .1936 . The computer has grown as large as a room.1960s .1970sComputers were used in offices and homes.Now .3.Careful readingA.Read through the text carefully and then fill in the blanksAlthough he was young,he could (1) difficult (2).After two hundred years he was built as an (3) machine by Charles Babbage.He could think (4).It was considered as a (5) revolution and start of his (6) intelligence.By the 1940s he grew as large as a room,This (7) worried his designers.As time (8) by,he was made smaller.First as a (9) computer (PC),then a laptop.With time going by,his memory improved too.As a result he (10) changed his shape.Over time his memory became (11) large (12) even he himself couldnt believe it!Since the 1970s many new (13) have been found for him.He has even been put into (14) and sent to (15) the Moon and Mars.Anyhow he knows his (16) is to provide humans with a life of high quality.B.Read the text again and then do the true or false exercises.1.In 1642 I began as a calculating machine and could solve any mathematical problem.()2.My real father was Charles Babbage,who wrote a book and built me in 1936.()3.After I got my new transistors in the 1960s,I became smaller but cleverer and quicker.()4.I was brought into peoples homes in the 1970s.()5.Since my birth I have been built to take the place of human race.()Step 2Cracking the hard pointsObserve the sentences carefully and translate them into Chinese.1.Over time I have been changed quite a lot.2.As a result I totally changed my shape.3.I developed very slowly and it took nearly two hundred years before I was built as an analytical machine by Charles Babbage.4.After all,with the help of my electronic brain which never forgets anything,using my intelligence is what Im all about.5.This means that it should clean the house,mop the floors,cook the dinner and deal with telephone calls.Step 3.ConsolidationRead the text carefully again and complete the following charts.Paragraph 1Paragraph 2Paragraph 3Topic sentenceOver time I have been changed quite a lot.These changes only became possible as my memory improved.Since the 1970s many new applications have been found for me.Supporting details1.calculating machine2.analytical machine3.universal machine4.PC5.laptop1. 2. 3. 4. 5. 1.2.3.4.5.6.7.8.Step 4.Post-readingHave a debate:Computers have good effects on our life.You may begin by.1.Great changes have taken place since computers came into peoples life.2.Over time.3.By using computers,we deal with.4.We cant live without.5.I dont agree.6.We still.with the help of.7.As a result,it.8.Computers have brought.9.so.that.10.I dont think there is anything in common.Some useful words,phrases and sentence patternsanyhow,from then on,totally,however,in a way,personally,over timein my opinion,whats more,whats worse,in addition,all in all课后提升1.And my memory became so large that even I couldnt believe it!我的存储容量变得如此之大,连我自己也不能相信!so.thatsuch.that如此以至于,引导结果状语从句,so后跟形容词或副词,such 后跟名词。A.句意:He speaks so fast that I couldnt follow him.B.用so,such 填空(1)It was beautiful a night that we went for a walk.(2)It is a big job that well have to be careful.(3)He has never done difficult work.(4)I havent seen Ann for long that Iv