高中英语Unit 22 Lesson 1 Global Warming课件1 北师大 选修8

1、2021/8/11 星期三1LESSON 1 GLOBAL WARMING 2021/8/11 星期三21 Global Warming In groups discuss what you know about global warming. Look at the pictures to get ideas.2021/8/11 星期三3Traffic Jam 2021/8/11 星期三4Factory2021/8/11 星期三5 The greenhouse effect is the rise in temperature that the Earth experiences becau

2、se certain gases in the atmosphere (water vapor, carbon dioxide, nitrous oxide, and methane, for example) trap energy from the sun. Without these gases, heat would escape back into space and Earths average temperature would be about 60F colder. Because of how they warm our world, these gases are ref

3、erred to as greenhouse gases. The Greenhouse Effect2021/8/11 星期三6The Greenhouse Effect 2021/8/11 星期三7 Without this greenhouse heating, the Earths average temperature would be only about -73 C (-100 F); even the oceans would be frozen under such conditions,such as the Moon and the Mars. MarsMoon2021/

4、8/11 星期三8What Are Greenhouse Gases? Some greenhouse gases occur naturally in the atmosphere, while others result from human activities. Naturally occuring greenhouse gases include water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Certain human activities, however, add to the levels of

5、most of these naturally occurring gases .2021/8/11 星期三9 Owing to the rise in atmospheric carbon dioxide caused by modern industrial societies widespread combustion of fossil fuels (coal, oil, and natural gas), the greenhouse effect on Earth may be intensified and long-term climatic changes may resul

6、t. 2021/8/11 星期三10When faced with this question, as individuals should recognize that collectively we can make a difference. What difference can we make?Individual 2021/8/11 星期三11 Taking action on global warming (or climate change) is similar. In some cases, it only takes a little change in lifestyl

7、e and behavior to make some big changes in greenhouse gas reductions. For other types of actions, the changes are more significant. When that action is multiplied by the 1.3 billion people in the China. Or the 6 billion people worldwide, the savings are significant.2021/8/11 星期三12Taking public trans

8、port like buses can reduce greenhouse gas emissions 2021/8/11 星期三13And Taking train can also help a reduction of greenhouse gas. 2021/8/11 星期三14The recycling symbol Buy the recycled productsRecycled products2021/8/11 星期三15Recycling the bottlesYour glass bottles could be recycled into house insulatio

9、n, plastic bottles could be made into a cosy fleece jacket.2021/8/11 星期三16Paper recycling your paper could become part of a road or race-track2021/8/11 星期三17using low-flow shower headsbuying energy-efficient light bulbsreplacewith2021/8/11 星期三18Vocabulary Use the expressions in the box in the correc

10、t form to complete the sentences. beyond our control, pump into, as a result of, in large quantities, refer to, speed up1 Water was the fish pond from the river.2 We all need to to finish in time!pumped intospeed up2021/8/11 星期三193 There is nothing more we can do .the situation is now .4 the acciden

11、t, she is now afraid of water.5 The scientist global warming at least three times in his speech.6 The factory was producing greenhouse gases .beyond our controlAs a result ofreferred toin large quantities2021/8/11 星期三20Grammar : ReportingWhat verbs are used in the text to report these statements?Exa

12、mple 1 = to report that1 Human beings are causing changes in the Earths climate.2 Gases pumped into the Earths atmospere have been speeding up the process of global warming.to report that to claim that 2021/8/11 星期三215 Global warming will cause dramatic climate changes including more frequent floods

13、 ,heat waves, and droughts.3 Global warming could be one of the biggest environmental problems facing the 21st century.to believe that to insist that 4 Global warming is mostly due to human activities.to warn that 2021/8/11 星期三22Look at these sentences from the text and explain why the underlined ve

14、rbs are not the same tense as the reporting verbs.1 Recent report from the IPCC warned that global warming will cause dramatic climate changes.2 Scientist found that the temperature of the Earth is controlled by greenhouse gases.Because it is in the futureBecause it is a general truth2021/8/11 星期三23

15、Match the sentences with appropriate reporting verbs from the list. Then write the reported sentences. admit,boast ,forbid ,inquire,invite,order,suggest, threaten1 Well close credit lines if you dont reduce carbon dioxide emissions.They threatened to close the credit lines if we dont reduce Cabon di

16、oxide emissions.2021/8/11 星期三243 Why dont you drop in tonight?2 OK, you are right,some poisionous chemical did escape into the atmospere.They admitted that some poisonous chemicals had escaped into the atmosphere.He /She/They invited me to drop in tonight.2021/8/11 星期三25He /She/They ordered me to st

17、and up immediately.He /She/They forbade us to use our dictionaries during the test.He /She boasted that he/she is the best student in that school.4 Stand up immediately!5 Im the best student in this school !6 You cant use your dictionaries during the test.2021/8/11 星期三268 Is the bus service running

18、according to the timetable today?He /She/They suggested having/that we shouldhave a cup of tea.I/He /She/They/We inquired if the bus service was running according to the timetable today.7 Shall we have a cup of tea?2021/8/11 星期三2710 use the following verbs to report the two dialogues.admit ,advise,p

19、romise ,warnTom: I dont think you should play the game today,John.John: Youre right.Im still a little bit ill, but I promise I wont overdo it.Tom advised John not to play the game today.John admitted that Tom was right because he was a little bit ill. He promised not to overdo it.2021/8/11 星期三28Tom:

20、 Be careful.If you yun around too much in this Weather you may get another attack of the “flu”.Tom warned John to be careful because if he ran aound too much in the weather he might get another attack of the flu.2021/8/11 星期三29b) accuse , beg, complain,deny,explain,refuseDaughter:Mum,please, will yo

21、u buy me this CD?Ive always wanted it .Mother: Sarah ,you know I cant afford it. Why do you always ask me to buy you expensive things?Sarah begged her mother to buy her the CD because she always wanted it.Her mother refused and explained that she couldntafford it. She complained that her daughter wa

22、s always asking her to buy her expensive things2021/8/11 星期三30The daughter denied this. She accused her mother of never buying her the things she wanted but only the things her mother liked.Daughter: Thats not ture. You just never buy me things that I want ,only those that you like!2021/8/11 星期三31La

23、nguage in use 11 Report the following statements that you heard at 9 a.m. this morning.Do you need to change the tense? 1 “Women live longer than men.”I heard that 2 “ Our galaxy contains several thousand million stars.”An astronomer announed that I heard that women live longer than men.An astronome

24、r announed that our galaxy contains several thousand million stars. 2021/8/11 星期三323 “The 2016 Olympics will be organised in Africa.”A sports expert said that 4 “This room is too hot.”Jonathan complained that 5 “The hurricane has killed 9 people.”The newspaper reportedA sports expert said that the 2

25、016 Olympics will be organised in Africa.Jonathan complained that this room was too hot. The newspaper reported the hurricane had killed 9 people.2021/8/11 星期三33Grammar: Reporting verbsWhen using reported speech, most students learn to use say ; tell and ask :e.g. I am going to the shop. He said (th

26、at) he was going to the shop. Sit down and open your books. She told us to sit down and open our books. Will you come with us tomorrow? He asked me if I would go with them the following day.2021/8/11 星期三34A native speaker of English, however, will often use reporting verbs other than just say, tell

27、and ask. Compare the following:I didnt do it! He said that he hadnt done it. He denied that he had done it OR He denied doing it. Ill bring the book back tomorrow. She said that she would bring the book back the following day. She promised to bring the book back the following day. 2021/8/11 星期三35Ple

28、ase will you think about it some more? He asked me if I would think about it some more. He begged me to think about it some more. First you should put the money in the slot and then you should press the button. She said that I should first put the money in the slot and then press the button. She exp

29、lained what I should do. 2021/8/11 星期三36Notice that different reporting verbs are followed by different structures, i.e.deny + that-clause OR deny + -ing formpromise + infinitive beg + object + infinitive 2021/8/11 星期三37 However, there are a number of other reporting verbs which can more accurately

30、describe what someone has said. These verbs take a variety of structures. The following list gives you reporting verbs in various categories based on sentence structure. Notice that a number of verbs can take more than one form. 2021/8/11 星期三38(1) verb + object + infinitive advise ;encourage ; invite ; remind ; warn Examples: 1 Jack en