课件36张PPT。Unit 4 Global warmingReading 本课件主要是围绕着Global warming而进行的阅读课。旨在让学生了解全球气温回升知识和热爱保护我们的地球，同时帮学生掌握阅读技巧，提高阅读能力。
学生对这一话题都不陌生，因此，本课用提问法导入，从而自然的过渡到正文中来，其中，穿插各种各样的图片，帮学生形象直观的了解温室效应的发展经过。快速阅读，找出the main idea of the passage and main ideas of each paragraph，训练学生快速提取并整合信息的能力。精读部分，设置了单选，True or false 等题型，多角度的训练学生的阅读能力，深层次的理解课文。Think about :What causes global warming?
Human activity or a random but natural phenomenon?When we talk about this problem, we naturally link it to the use of energy and the environmental pollution.We ____________energy to do many things in our lives. For axample, energy ______our cities and ______our buildings. What other things do we use energy for?But firstly and importantly, energy makes a great difference to our lives. What things do we use energy for?depend onlightsheatsThings that use energy around us or at any other places:In a houseWhere does all this energy come from?Place and the related energyWind power windPlace and the related energya coal power station coalPlace and the related energywww.themegallery.comoil refinery
（提炼厂）oilPlace and the related energynuclear power stationUranium
铀Place and the related energysolar panels
（镶板） solar powerEnergy at home,school …Coal
Oil
Natural gas
Wind (wind power)
Sun (solar energy)
Uranium (nuclear energy)
Water (hydro-electric power)sources of energythings using energy Lights
Heating
Television
Cassette player
Video recorder
Computer
Fridge
Stove
Washing machine
Hairdryer Energy at home, school …Coal
Oil
Natural gas
Wind (wind power)
Sun (solar energy)
Uranium (nuclear energy)
Water (hydro-electric power)
sources of energyrenewable or non-renewableNon-renewable
Non-renewable
Non-renewable
Renewable
Renewable
Non-renewable
Renewable
www.themegallery.comLet’s try to save energy! To save energy is to save our earth!!Slogan['sl?ug?n] ----n. 标语,口号As we know, coal, oil and natural gas are called __________________ , which is a kind of energy. It can make a great __________to our lives. But do you know what by ________ is produced when we burn fossil fuel? Is it good for our planet? What ph__________ is caused by it?differenceenomenonproductfossil fuelFossil FuelFossil Fuelcoaloil natural gas● ● ● ● ● ●Why?Picture readingA greenhousegreenhousePicture readingA greenhouse
is made of _______ and is used for growing ________, especially during _____ weather.What is a greenhouse made of and used for?glassplantscoldThe air inside is warm because the glass ______ the heat from the sun and keeps it from _________. This makes the greenhouse __________ and so the plants can grow _____________________.trapsescapingheat upthroughout the cold periodHow does a greenhouse work?www.themegallery.comNow can you connect global warming with greenhouse and think of the relationship between them? Maybe you can understand why we call global warming “greenhouse effect”, right?What’s greenhouse effect?greenhouse effectSurely we need greenhouse gases. Without greenhouse effect, the earth would be___________.In the atmosphere surroudning the earth there are gases called “greenhouse gases”. What do you think greenhouse gases do?It is a pity that human activity gives off extra ______________into the atmosphere therefore it causes______________.too coldcarbon dioxideglobal warmingReadingTask 1 SkimmingSkim the title:
THE EARTH IS BECOMING WARMER – BUT DOES IT MATTER?What is the main topic?
A. The earth. B. Global warming.
C. Becoming warmer doesn’t matter.
? Task2 .ComprehendingStructure1)How many paragraphs does the reading
2) Make a division of the text.Read the passage quickly (3′)text consist of? Please number them.Part1
Part2
Part3
C. Introduction of global warming. (1)(2-5)(6-7)B .How global warming comes about.A . List different attitudes.True or false?( P27 )scanning1.The temperature in the last century didn’t seem to increase much.
2.Everyone believes that global warming is caused by the activities of humans.
3.Janice Foster believes she can measure the future global rise in temperature.
4.The rise in carbon dioxide is causing a steady increase in global warming.
5.George Hambley believes that global warming will do good rather than harm to the earth.
6.It is clear what the effects of global warming will be.http://www.jtyhjy.com/edu/ppt/ppt_notInterruptVideo.action?mediaVo.resId=53cf71675aa8e961a5a5b66f1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977? A. Dr. Janice Foster. B. Charles Keeling. C. George Hambley. D. Sophie Armstrong.BDetail reading2. Which of the following is Dr Janice Foster’s opinion?
A. The result of the temperature increase will be serious.
B. The amount of warming is nothing serious.
C. We needn’t worry about high levels of carbon dioxide.
D. Global warming is a natural phenomenon.A3. Which of the following is TRUE according to the text?
A. The temperature of the earth increased about one degree Fahrenheit during the 20th century.
B. The carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997.
C. All scientists accept the data in graph 2 except Charles Keeling.
D. Janice Foster says that more carbon dioxide will make plants grow faster.A4. The author probably agrees that ________ A. actually global warming is good for man. B. we should do nothing about the global warming. C. catastrophes will happen if the globe keeps on warming. D. a lot remains to be found out about the effects of global warming.
DThank You !课件33张PPT。VocabularyUnit 4 Global warming 本节课解释重点单词短语及其相关句型，设计思路遵循在语境中学习英语语言的原则。
用汉译英常用短语导入新课，既巩固了语言点，又达到了让学生自我检测的目的。在讲解重点词汇时，既列举了实例，又给出了准确的中文翻译，中英文结合，更好的帮学生理解和学习语言点。在语言点的扩展上，有不同词性的转化扩展，还有同类短语的总结，让学生更系统的掌握相关知识点。巩固练习，以历年高考题为主，并且给出了详细的解析，帮学生深刻的理解重点和难点。
consume phenomenon range random state consequence mild oppose tend glance steady Lead independ ongo upcome aboutsubscribe to quantities ofresult inbe opposed toeven ifkeep on1．What do you think green house gases do?
你认为温室气体有什么作用呢?
▲本句中think后接了一个由what引导的宾语从句。但应注意的是：特殊宾语从句即当一般疑问句主句的谓语动词是 think, believe，suppose，consider, imagine，guess 和 suggest 等时，表疑问的词要放在主句前即句首。 例如：
[正] Who do you think will win in the game?
[误] Do you think who will win in the game? 当然一般情况下宾语从句的疑问词应放在主句之后，例如：
[误] Why do you know we can't cut down the big tree?
[正] Do you know why we can't cut down the big tree?2. So how has this come about and does it matter? [考点] come about 是不及物短语，意为“发生”。
Please tell me how the accident_____. I
am still in the dark.
A. came by B. came out
C. came to D. came about达到3. There is no doubt that the earth is
becoming warmer and that it is human
activity that has caused this global
warming rather than a random but
natural phenomenon.
There is no doubt that….
There is some doubt whether….
辨析：主句为肯定句时，doubt 后使用连词whether。主句为否定句时，doubt后则使用连词that。 eg:
There's no doubt that one day a
cure will be found.
There is little doubt that he was
the killer.[考点1] There is no doubt that ...是固定句型，意为“毫无疑问……”，that引导的是同位语从句，用来进一步补充说明doubt的具体内容。
[考例] Some researchers believe that there is no doubt ______ a cure for AIDS will be found.
A. which B. that C. what D. whether
[点拨] 根据固定搭配there is no doubt that ...可知选B。[考点2] it is ... that ...在此句中构成强调句型，强调的是主语human activity。强调句型除谓语不能强调外，可强调主语、宾语或状语。
[考例1] It is not who is right but what is right ______ is of importance.
A. which B. it C. that D. this
[点拨] 根据强调句型的判断方法：将it is和that去掉后，此句成为Not who is right but what is right is of importance，是一个完整的句子，故此题是一个强调句型。[考例2] I don’t mind her criticizing me, but ______ is how she does it that I object to.
A. it B. that C. this D. which
[点拨] 去掉it is和that后，本句相当于..., but I object to how she does it，是个完整的句子。故此句是it强调句型，被强调部分是宾语从句。4. amount of
习惯用语：
an amount of 相当数量的; 一些
any amount (of) 任何数量(的); 大量(的)
be of little amount 不重要; 无价值 n. 数量
large amounts of money 大量的金钱
In an invoice the amount of money should be written both in words and in figures.
发票上的钱数要用字和数码写出来。5．Without the ‘green house effect’，the earth would be about thirty-three degrees Celsius cooler than it is.
如果没有温室效应，地球会比现在冷33℃。
▲这是一个含蓄虚拟条件句 应该注意有时假设的情况并不以条件从句形式表示出来，而是通过一个介词短语或其他方式表示。常用的词或短语有：without, but for，but that，otherwise，or，but等。 例如：
Without your help ( = If we had not had your help)，we could not have succeeded．
要是没有你的帮助，我们是不会成功的。 But for electricity (= If there were no electricity)，there would be no modem industry．
要是没有电，就不会有现代工业。6. It was a scientist called Charles Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.
[翻译] 是一位名叫查尔斯·奎林的科学家把1957至1997年期间大气层中二氧化碳的含量作了精确的统计。
[点拨] 该句是一个it was ... who强调句。a scientist called Charles Keeling是被强调部分，其中called Charles Keeling为过去分词短语作后置定语，修饰a scientist。7. result in 导致, 造成 =lead to The accident resulted in three people
being killed.
这一事故导致他的死亡。 The accident resulted in his death.8. On the other hand, there are those, like George Hambley, who are opposed to this view, believe that we should not worry about high levels of carbon dioxide in the air .
[翻译] 在另一方面, 还有一些人，对这一观点持反对态度，像科学家乔治·汉布利，他们认为我们不必担心空气中高含量的二氧化碳。[点拨] 该句是一个主从复合句。主句为there are those，like scientist George Hambley作句子的插入语，who引导的定语从句修饰those，且在该定语从句中其谓语动词believe又带有that引导的宾语从句。句子的主要部分可以表示为: ... there are those who believe that ... I'd like to eat out, but on the other hand I should be trying to save money.
I want to go to the party, but on the other hand I ought to be studying.
我想去参加聚会，但从另一方面来说，我应该留下来学习。9. consequencein consequence 因此
as a consequence 结果
as a consequence of 由于…的结果10. rangein /within range 在射程之内
out of / beyond range 在射程之外11. build upBuild up the business
Sediment (沉淀物)builds up on the ocean floor.
This built up my hope after the interview.develop 扩大, 发展 collect 累积, 收集 增加, 支持, 树立12. even if /though: used to emphasize that, although something may happen or may be true, it will not change a situation
I wouldn't tell you even if I knew. Even if she survives, she'll never fully recover.
Even though he's 24 now, he's still like a little child.
I can still remember, even though it was so long ago.
12. advocate v.
提倡,主张,拥护,鼓吹/ n.提倡者
He advocates building more schools.
The public advocated passing the law.13. We do not have to put up with pollution.
put up with: suffer or bear patiently; tolerate 忍受；容忍
I cannot put up with the toothache.
We can't change the bad weather, so we must put up with it.
I won’t put up with her rudeness any longer!14. so long as / as long asas long as 只要，如果
As long as there is life, there is hope.
留得生命在,不怕没希望.
You can go out, as / so long as you promise to be back before 11 o'clock.
你可以出去,只要你答应在11点以前回来.
I'll accept any job as / so long as I don't have to get up early.
只要不必早起,任何工作我都可以接受.
课件25张PPT。Unit 4 Global warmingGrammar 本节课主要介绍强调句型中的It基本 用法和特殊用法，旨在让学生理解掌握并会运用这一重点句型。
首先复习the use of it 来导入本课，特别是用一漫画导入到强调句型，很符合学生的年龄特点，能最大程度的激起学生的兴趣。然后分析了含有主谓宾定状补的句子成分，为下面的强调句型做好铺垫，即可以强调除了谓语以外的所有句子成分。本课件给了大量的例句，更好的帮学生理解这一常考句型。在巩固练习上，题型多样化，句型转换等，从不同侧面来及时巩固It is/was +被强调部分 +that/ who/ whom +其他句型。
it的用法(Ⅱ)Grammar
( )1.Look at the picture. It is a picture of our school. A.代指时间
( )2.It’s half past eight now. B.代指环境
( )3.It’s only half an hour’s walk from here to our school. C.代指物件
( )4.It rains heavily. D.代指距离
( )5.It is quiet here. E.代指天气
( )6.It is possible that we will win. F.形式主语
( )7.I think it easy to put on weight. G.形式宾语Review the use of “it”
Match the fun_ction of “it” with the right sentence: CADEBFGLead in The puppy broke it。No,not me. It was Tom who broke the vase。It is/was +__________ +that/ who/ whom +_______Conclusion It用作强调句的句型模式：1.强调主语
It was Tom that/ who lost a book in the taxi yesterday morning.
2. ?强调宾语 It was a book that Tom lost in the taxi yesterday morning.
3.强调地点状语
It was in the taxi that Tom lost a book yesterday morning.
4.强调时间状语
It was yesterday morning that Tom lost a book in the taxi .Analyze the following sentence:
Tom lost a book in the taxi yesterday morning.Observe the following sentences. Work in groups. Find out the structure in which “it” is used for emphasis.剩余部分被强调部分Comparison Work in groups. Try to find out the differences between the similar “It is /was … that …” sentences. 1. It was in the village that I once lived.
2. It is the village (that/which) I once lived in.
3. It is important that you （should）learn English well.根据强调句独特的句型特点:It is/was +被强调部分 +that/ who/ whom +剩余部分，你能找出判断强调句的方法么？强调句，强调地点状语“in the village ”It作形式主语，替代后面的主语从句that you learn English well.从句谓语用虚拟语气： （should）do It 代指地点；that/which引导定语从句，代指先行词the village 并在定语从句中作宾语,所以也可以省略。Think it twice Tip: (还原法)
去掉It is/was 与that/ who/ whom ，看余下部分是否构成一个完整的句子。强调句型中, 为了强调句子的某一成分
(通常是主语、宾语或状语), 常用结构:
It is / was + 被强调部分 + that (who) …
原句:
I met Tom in the street yesterday. ① It was I who (that) met Tom in the street yesterday.
② It was Tom that I met in the street yesterday.
③ It was in the street that I met Tom yesterday.
④ It was yesterday that I met Tom in the street.主语宾语时间状语地点状语it在强调句中的用法
1. Peter lent us the money.
2. They want money.
3. All this happened on Monday.
It was Peter who lent us the money.It is money that they want.It was on Monday that all this happened.根据划线部分把下列句子变成强调句。4. I didn’t hear from her until last
summer.
5. Why does everyone think I am
narrow-minded? It was not until last summer that I heard from her.Why is it that everyone thinks I am narrow-minded?it的用法：代词it；引导词it。口诀：
代词 it 本意它, 既可指这又指那;
时间天气均可指, 谈到距离也用它;
假主假宾均可作, 强调句型跟that。我们如何区分it在句中的不同成分呢?1. It’s difficult to remember all their names.
2. It’s very quiet in the café.
3. It rained for three days.
4. He made it clear that he didn’t want to
speak to me.
5. It was nice to meet you.
形式主语, 代替……CircumstanceWeather形式宾语, 代替……Quiz II: Discuss the following sentences
and tell the fun_ction of “it”.形式主语, 代替……6. It was on Tuesday that Smith came.
7. It’s three miles from here to the nearest garage.
8. A tall man stood up and shook hands.
It was captain Jim.
9. I hear you bought a new bike. Can you
show it to me?用于强调句型中Distance人称代词，代表前面提到的人人称代词，代表前面提到的物10. It was five o’clock when we got back
home yesterday.
11. It was dirty and wet below the ship
where the slaves were kept.
12. It was on this coast that lots of his
people disappeared.
13. It was most likely that one third of
them had lost their lives.Time Circumstance用于强调句型 作引导词，在句中作形式主语，
代替后面的从句课件22张PPT。Unit 4 Global warmingUsing language 本课件主要是围绕what can we do about global warming 而进行的阅读写作 课，旨在提高学生的阅读和写作能力，以及语言输入向语言输出的转化能力。
首先，用图片引入主题,唤起学生的无意注意，之后，再用系列的图片让学生意识到全球变暖带来的危害。在快速阅读部分，设置了简答题，训练学生快速提取信息的能力，在精读部分，提供了True or false，填表 和简答题，更好的帮学生掌握more details,深层次的理解课文.Discussion 部分，用一看似诙谐幽默的视频传达一个严重的气候问题，打开学生的思路，紧接着让学生讨论，最后，writing部分，让学生写一个Poster。
What can we do
about global warmingHave you ever seen the film 2012 ?What kind of disasters have you seen in the film?
What have you learnt from the film?Global WarmingDesertification沙漠化
DroughtWhat other disasters will be caused by global warming?melting glaciersfloodfamines diseasesdisappearance of speciesThe earth is in danger.gas emission What causes the global warming? What can we do about global warming?Who is the writer?
2. What is the purpose of the email? / What are the two concerns of the email?Read the first letter, and answer the questions below:Reading:A student named Ouyang Guang.① His opinion that, as an individual, he can have no effect on environmental problems.
② Getting some suggestions for what he can do about global warming . Read the second email, and answer the questions:
1. Does Earth Care agree with Ouyang Guang’s opinion that individuals can have no effect?No, Earth Care does not agree.2. What suggestions does Earth Care give him?If you are not using electrical appliances, turn them off. Save energyIf you’re cold, put on more clothes instead of turning up the heat.Save energyMotor vehicles use a lot of energy, so walk or ride a bike if you can.Save energyRecycle cans, bottles, plastics and newspapers and buy things made from recycled materials.Save energyGet your parents or friends to buy products that are made to save energy.Save energyPlant more treesPlants absorb carbon dioxide from the airTalk with your family and friends about global warming and tell them what you’ve learned.Together, individuals can make a difference.Listen to the tape, and tell the following statements true(T) or false(F).
The author(Ouyang Guang) thinks that individuals have much effect on environmental problems.
In fact, everyone’s contribution makes a difference in protecting our earth.
It is OK to leave an electrical appliance on.FTFhttp://www.jtyhjy.com/edu/ppt/ppt_notInterruptVideo.action?mediaVo.resId=55fa72e3af508f0099b1ce3bGroup DiscussionWhat else should our government do to slow down global warming?1.Give money to green the surroundings and protect the forests.2.Encourage people to find and use more renewable energy.3.Make laws to protect rare plants and animals .用诙谐幽默的视频告诉我们，不能放弃拯救我们的地球http://www.jtyhjy.com/edu/ppt/ppt_playVideo.action?mediaVo.resId=53cf6fa75aa8e961a5a5b372Fighting global warming
Cut down on energy. Cut down on carbon dioxide.
●If not using an electrical item, turn it off.
●If you suddenly feel cold, don’t turn the heat up, put a jacket instead.
●Walk or ride a bike and save fossil fuels.
●Recycle paper, cardboard and newspapers.
●Buy products made from recycled materials.
●Buy energy-saving products like low energy light bulbs.
●Plant trees to absorb CO2.
●Tell your friends about global warming.
Every effort counts!劝说性写作：海 报
一、题目要求
请你以“学习英语为何如此重要”为话题写一则英语海报，强调英语的重要性。
要点：1.英语是外贸用语；
2．是国际组织的官方语言；
3．与西方人交流的语言工具等。
注意：1.词数：100左右；
2．可适当增加细节，以使行文连贯。Writing二、构思谋篇三、关键词语 Make a poster for your school that tells students various ways they can reduce the amount of carbon dioxide in the air.
