北师大版高中英语必修2《Unit4 Lesson3》课件

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1、Virtual Reality,The use of computers with sounds and pictures that make you feel as if you are in a real situation.,virtual reality,headsets and special gloves and suits equipped with sensors,the user can directly interact with a 3D (dimension) computer programme by moving inside it.,Playing virtual

2、 reality computer games,Possible uses for virtual reality now,Learning to fly using virtual reality simulator,Visiting virtual museums on the Internet,Words preview Lesson 3,suggest title destination flesh in the flesh exit historical,n. 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,site p

3、ack dip toe millionaire smoker non-smoker,n. 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 preview Lesson 3,Which of these uses for virtual reality are possible now? virtual reality holidays learning to fly using virtual reality technology playing virtual reality computer games visiti

4、ng virtual museums on the Internet,Before you start,1,Listening,Listen 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

5、next Mondays lesson, the science teacher _ be angry. Do you have anything planned 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 to,finish my project,will,go camping,Tom: If you go to the

6、Science Museum _, youll find lots of good information. Cathy: Thanks for your suggestion. Just 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 any

7、where we like.,website,virtual reality,wouldnt,destinations,Tom: Do you mean well use the _ to travel around 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 holida

8、ys.,imagine,universities,virtual,computer,1.Why cant Cathy go out this weekend? She has to finish her project. 2.Where is 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 questions,Reading,4. Does she real

9、ly 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 world-famous university. 6. Why is Cathy so excited about the technology? She thought she would be able to go anywhere she liked.,Questions:,(1) Is virtual reality

10、holidays possible now? (2) Do we have virtual universities now?,Discussion,Speaking,Compared with real universities, what are the advantages and disadvantages of a virtual university?,Real university,Advantages: 1. learn and improve ones social skills 2. attend all kinds of colorful activities 3. co

11、mmunicate with different sorts of people 4. Disadvantages: 1.have to pay a lot of money for study 2.not safe enough 3. ,Harvard University,University of Cambridge,University of Oxford,Tsinghua University,Beijing University,save money to build the walls and teaching buildingsanytime, anyplace conveni

12、ent 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 university,cant learn and improve someones social skills lack of Face-to-face communication cant go to a virtual universit

13、y without special equipments (special headset and gloves),Disadvantages of a virtual university,The first conditional is a structure used for talking about possibilities in the present or in the future.,First Conditional,Grammar,A first conditional sentence consists of two clauses, an “if“ clause an

14、d a main clause:,Structure,Using,The First Conditional is used to talk about things which are possible in the present or the future - things which may happen:,If 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 - th

15、ats possible. Maybe Juan will 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 sentences,Answers for reference (p13),b),5,6,2 Will you go out with me on

16、 Saturday night if you finish the project? 3 If 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 isn

17、t good tomorrow? 8 My sister wont go to London if she doesnt pass her exams.,If you _ an apple every day, youll be very healthy. eat B. will eat 2. If we dont protect the elephant, it _ extinct. A. becomes B. will become,Exercises,3. She _ completely different if she cuts her hair.A. looks B. will l

18、ook 4. Youll pay higher insurance if you _ a sports car.A. buy B. will buy 5. You _ better if you turn on the lamp. A. are able to see B. will be able to see,6. You _ heart disease if you eat too much meat. A. get B. will get 7. If you dont put so much sugar in your coffee, you _ so much weight! A.

19、dont put on B. wont put on 8. You wont pass the course if you _. A. dont study B. wont study,9. If a deer _ into your garden, it _ all your plants.A. gets. will eat B. will get. eats 10. If I _ some eggs, how many _?A. cook. will you eat B. will cook. do you eat,The second conditional is a structure

20、 used for talking about unreal situations in the present or in the future.,Second Conditional,Structure,Like 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.,I would buy a big house if I

21、 had a million dollars.,main clause,Using,The 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:,If I were you, I would drive more carefully in the rain. Paula would be

22、sad if Jan 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

23、a lot to charity. If there 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.,Example,If 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

24、the USA,Complete the sentences,Answers for reference (p13),c),7,8,1 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 t

25、he trouble. 5 I would make new friends if I used the Internet.,If he were a young man, he _ able to walk faster.is B. was C. will be D. would be 2. Wed be on the beach if we _ in Mexico! A. are B. were C. will be D. would be,Exercises,3. If smoking were allowed, I _ a cigarette. have B. had C. will

26、have D. would have4. If there _ no mosquitoes, there would be no malaria. A. are B. was C. were D. would be,5. If her hair were black, she _ completely different.A. look B. looksC. will look D. would look6. If I _ a penny for every can of soda Ive drunk in my life, I would be rich!A. have B. hadC. w

27、ill have D. would have,7. Hes so stupid! If he _ an animal, he would be a sheep. A. is B. was C. were D. would be 8. We dont mind camping, but if we _ enough money, we _ in a hotel. A. would have.stayed B. have. stayed C. had. would stay D. had. stayed,9. We would learn a lot from dolphins if they _

28、. A. could talk B. can talk C. talk D. will talk 10. If the weather _ better, we _ to the park. A. were. will go B. were. would go C. is. would go D. was. go,1. 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

29、 Second Conditionals,First Conditional Nature: Open condition, what is said in the condition is possible. Time: This condition 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 Conditional,

30、2. Second Conditional Nature: unreal (impossible) or improbable situations. Time: present; the TENSE is past, but we are talking about 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 syste

31、m. (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),Homework,Write 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,Thank you!,