北师大版高一英语必修二课件：unit4 Cyberspace Lesson3 (共60张PPT).ppt

1、Virtual RealityThe use of computers with sounds and pictures that make you feel as if you are in a real situation.virtual realityheadsets and special gloves and suitsequipped with sensorsthe user can directly interact with a 3D(dimension)computer programme by moving inside it.Playing virtual reality

2、 computer gamesPossible uses for virtual reality nowLearning to fly using virtual reality simulatorVisiting virtual museums on the InternetWords previewLesson 3suggesttitledestinationfleshin the fleshexithistoricaln.提议，建议n.标题，题目n.目的地n.肉，肉体本人亲身vt.出，离开adj.历史的,有关历史的sitepackdiptoemillionairesmokernon-sm

3、okern.位置，场所vt.收拾(行李)，打包vt.浸n.脚趾n.百万富翁n.吸烟者n.非吸烟者Words previewLesson 3Which of these uses for virtual reality are possible now?virtual reality holidays learning to fly using virtual reality technology playing virtual reality computer games visiting virtual museums on the InternetBefore you start1List

4、en to the dialogue carefully between Tom and Cathy,and try to fill in the blanks with the right words.Tom:Hi,Cathy!What are you _ this weekend?Cathy:I have a lot of work to do.If I dont _ on the history of the Internet for next Mondays lesson,the science teacher _ be angry.Do you have anything plann

5、ed for Saturday and Sunday?Tom:If the weather is good,my family will _.We wont go if it rains.If I stay home,Ill help you with your project if you like.up tofinish my projectwillgo campingTom:If you go to the Science Museum _,youll find lots of good information.Cathy:Thanks for your suggestion.Just

6、think,if we had _ holidays,we _ have any problems with the weather.We wouldnt have to spend a long time travelling to get to our holiday _.In the future,well be able to use modern technology to go anywhere we like.websitevirtual realitywouldntdestinationsTom:Do you mean well use the _ to travel arou

7、nd the world?Cathy:Thats right!Just _it.We would also be able to go to study in any world famous _ we wanted to.Tom:Great!But personally,I prefer _ universities to virtual reality holidays.imagineuniversitiesvirtualcomputer1.Why cant Cathy go out this weekend?She has to finish her project.2.Where is

8、 Tom planning to go?Hell go camping if the weather is good.3.Does Cathy have a programme for“virtual”holidays on her computer?No.Answer the questions4.Does she really think she will have the chance to go on a world tour?No.5.What would Tom like to do with virtual reality?He would like to go to a wor

9、ld-famous university.6.Why is Cathy so excited about the technology?She thought she would be able to go anywhere she liked.(1)Is virtual reality holidays possible now?(2)Do we have virtual universities now?DiscussionCompared with real universities,what are the advantages and disadvantages of a virtu

10、al university?Real universityAdvantages:1.learn and improve ones social skills2.attend all kinds of colorful municate with different sorts of people 4.Disadvantages:1.have to pay a lot of money for study2.not safe enough3.Harvard UniversityUniversity of CambridgeUniversity of OxfordTsinghua Universi

11、tyBeijing University save money to build the walls and teaching buildings anytime,anyplace convenient to attend more comfortable learning environment not have to pay tuition save transportation time lower cost:download text material instead of buying Advantages of a virtual universitycant learn and

12、improve someones social skills lack of Face-to-face communication cant go to a virtual university without special equipments(special headset and gloves)Disadvantages of a virtual universityThe first conditional is a structure used for talking about possibilities in the present or in the future.First

13、 Conditionalif clausemain clauseA first conditional sentence consists of two clauses,an if clause and a main clause:StructureIf you study hard,you will pass the test.main clauseif clauseYou will pass the test if you study hard.if clauseif+subject+simple present verbmain clausesubject+will+verbUsingT

14、he First Conditional is used to talk about things which are possible in the present or the future-things which may happen:ExampleExplanationIf its sunny,well go to the park.Paula will be sad if Juan leaves.If you cook the supper,Ill wash the dishes.Maybe it will be sunny-thats possible.Maybe Juan wi

15、ll leave-thats possible.Maybe you will cook the supper-thats possible.If I dont finish my homework,If the weathers good,If it rains,If you/I go to,If I pass the examination,Complete the sentencesAnswers for reference(p13)b)562 Will you go out with me on Saturday night if you finish the project?3 If

16、you go to that website,you ll find some interesting information.4 Will you go to that concert if it rains?5 Shell buy a computer if she gets that job.6 Ill give you the information if you telephone me tomorrow.7 What will you do if the weather isnt good tomorrow?8 My sister wont go to London if she

17、doesnt pass her exams.1.If you _ an apple every2.day,youll be very healthy.A.eat B.will eat2.If we dont protect the elephant,it_ extinct.A.becomes B.will becomeExercises 3.She _ completely different if she cuts her hair.A.looks B.will look4.Youll pay higher insurance if you _ a sports car.A.buy B.wi

18、ll buy5.You _ better if you turn on the lamp.A.are able to see B.will be able to see6.You _ heart disease if you eat too much meat.A.get B.will get7.If you dont put so much sugar in your coffee,you _ so much weight!A.dont put on B.wont put on8.You wont pass the course if you _.A.dont study B.wont st

19、udy9.If a deer _ into your garden,it _ all your plants.A.gets.will eat B.will get.eats10.If I _ some eggs,how many _?A.cook.will you eat B.will cook.do you eat The second conditional is a structure used for talking about unreal situations in the present or in the future.Second ConditionalStructureif

20、 clausemain clauseLike a first conditional,a second conditional sentence consists of two clauses,an if clause and a main clause:If I had a million dollars,I would buy a big house.if clauseif+subject+simple past verbmain clausesubject+would +verbif clauseI would buy a big house if I had a million dol

21、lars.main clauseUsingThe Second Conditional is used to talk about impossible situations or things which are unreal(not true or not possible)in the present or the future-things which dont or wont happen:ExampleExplanationIf I were you,I would drive more carefully in the rain.Paula would be sad if Jan

22、 left.If dogs had wings,they would be able to fly.I am not you-this is unreal.Jan will not leave-thats not going to happen.Dogs dont have wings-thats impossible.If we were in London today,we would be able to go to the concert in Hyde Park.If I had millions of dollars,Id give a lot to charity.If ther

23、e were no hungry people in this world,it would be a much better place.If everyone had clean water to drink,there would be a lot less disease.ExampleIf we had a holiday from school tomorrow/next week,If I had a lot of money,If I lived in England,If I had a holiday in the USA,Complete the sentencesAns

24、wers for reference(p13)c)781 a)2 a)3 b)9 1 If I surfed the Internet,I would find interesting information.2 If I did not have a try,you would laugh at me.3 If I took part in the game,I would win.4 If you told the police,they would help you get out of the trouble.5 I would make new friends if I used t

25、he Internet.1.If he were a young man,he _ able to walk faster.A.is B.was C.will be D.would beB.2.Wed be on the beach if we _ in Mexico!C.A.are B.were C.will be D.would beExercises 3.If smoking were allowed,I _ a cigarette.A.have B.had B.C.will have D.would haveC.4.If there _ no mosquitoes,there woul

26、d be no malaria.D.A.are B.was C.were D.would be 5.If her hair were black,she _ completely different.A.look B.looks C.will look D.would look 6.If I _ a penny for every can of soda Ive drunk in my life,I would be rich!A.have B.had C.will have D.would have7.Hes so stupid!If he _ an animal,he would be a

27、 sheep.A.is B.was C.were D.would be8.We dont mind camping,but if we _ enough money,we _ in a hotel.A.would have.stayedB.have.stayedC.had.would stayD.had.stayed9.We would learn a lot from dolphins if they _.A.could talk B.can talkC.talk D.will talk10.If the weather _ better,we _ to the park.A.were.wi

28、ll go B.were.would goC.is.would go D.was.go1.First Conditional:If I have enough money,I will go to Japan.2.Second Conditional:If I had enough money,I would go to Japan.First and Second Conditionals1.First Conditionala.Nature:Open condition,what is said in the condition is possible.b.Time:This condit

29、ion refers either to present or to future time.If he is late,we will have to go without him.If my mother knows about this,we are in serious trouble.Uses of the Conditional2.Second Conditionala.Nature:unreal(impossible)or improbable situations.b.Time:present;the TENSE is past,but we are talking about

30、 the present,now.If I knew her name,I would tell you.If I were you,I would tell my father.Compare:If I become president,I will change the social security system.(said by a presidential candidate)If I became president,I would change the social security system.(said by a schoolboy:improbable)If we win this match,we are qualified for the semifinals.If I won a million pounds,I would stop teaching.(improbable)HomeworkWrite a short passage about your ideal future.Example:Id like to live in Beijing as a mayor.If I were a mayor in Beijing,I would