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1、Unit 4 Global warming,Using language,What can we do about global warming?,Skim the letters and find who the writers are and what their purpose of writing the letters is.,Skimming,The first letter is written by a student who is asking for suggestions for his project global warming. The second letter
2、is written by an editor of Earth Care magazine. He offers the student some suggestions on what to do about global warming.,List Earth Cares suggestions and then in groups, discuss whether you think you can carry out each suggestion.,Scanning,If you are not using electrical appliances, turn them off.
3、,Yes,Save energy,Yes,Save energy,Yes,Save energy,Yes,Save energy,If youre cold, put on more clothes instead of turning up the heat.,Motor vehicles use a lot of energy, so walk or ride a bike if you can.,Recycle cans, bottles, plastics and newspapers and buy things made from recycled materials.,Yes,S
4、ave energy,Yes,Plants absorb carbon dioxide from the air.,Plant more trees.,Get your parents or friends to buy products that are made to save energy.,Yes,Together, individuals can make a difference.,Talk with your family and friends about global warming and tell them what youve learned.,Read the tex
5、t carefully and fill in the blanks.,What can we do about global warming? Turn a(n) _ off when youre not using it. Put on more clothes instead of turning up the _. Walk or _ instead of taking motor vehicles.,electrical appliance,heat,ride a bike, _ cans, bottles, plastics and newspapers. Buy things m
6、ade from _ _. Buy products that are made to save _. _ in your garden or your school yard. Talk with your family and friends about _.,recycled materials,energy,Plant trees,global warming,Recycle,Language points,1. I am doing a project on behalf of my school about global warming. on behalf of 代表一方， 作为
7、的代言人 (通常在句中作状语) e.g. Im writing on behalf of my mother to express her thanks for your gift. 我代表我母亲写信, 对你的礼物表示感谢。,He spoke on behalf of all the members of the staff. 他代表全体教职员工讲了话。,2. Sometimes I feel that individuals can have little effect on such huge environmental problems. 有时候我觉得像这样一个巨大的环境问题，个 人是起
8、不了什么作用的。 have an/some/much/little/noeffect on 对有/有一些/很多/几乎没有/没有影响(作用) The advertisements _ sales. 这些广告对销售额并没有起到多大作用。 The medicine _ his illness. 这药对他的病一点作用也没有。,didnt have much effect on,have no effect on,3. advocate 用作动词, 表示“拥护、提倡”时, 后接名词或动名词形式, 如: He advocates reforming the prison system. 他主张改良监狱制度
9、。 用法归纳: advocate sth. 提倡, 拥护某事 advocate doing sth. 提倡, 拥护做某事 advocate that + 从句 主张, 提倡 特别提示: advocate后接从句时, 从句谓语需用 “should do”表示虚拟, should可以省略。,4. commitment n. 表示“承诺, 保证” make a commitment to sb./sth. “对某人/某事做出承诺” Our company has a commitment to quality and customer service. 我们公司对质量和顾客服务有承诺。,commit
10、 v. 1) 使承担义务; 使作出保证; 使表态 2)做(不合法的、错的或愚蠢的事); 犯 commit suicide 自杀,5. Individuals can make a difference. make a difference 有影响；很重要 make some difference to 对.有些关系 make no difference to 对. 没有关系,That makes no difference to me. 那对我没有影响。 Exercise can make a great difference to your health. 锻炼对你的健康产生很大的影响。,6
11、. We don not have to put up with pollution. put up with 忍受，容忍 e.g. He couldnt put up with the noise, so he kept the windows shut all day long. 他忍受不了嘈杂声，所以整天窗户紧 闭。,I cant put up with her another day she never stops complaining. 她整天抱怨，我一天也不能忍受了。,7. It is OK to leave an electrical appliance on so long
12、as you are using it if not, turn it off! so long as 只要，也可以用作as long as e.g. You will do all right so long as you follow my advice. 只要你听我的建议, 你一定会做好的。 I am happy so long as you are happy. 只要你高兴，我就高兴。,8. Recycle cans, bottles, plastic bags and newspapers if circumstances allow you do. circumstance n.
13、环境，情况 e.g. I know I can trust her in any circumstance. 我知道我在任何情况下都能信任她。 You should soon accommodate yourself to the new circumstance. 你应尽快适应新环境。,under the circumstances under no circumstances,在这种情况下，既然如此 绝不，无论如何不,9. Your contribution counts! 你的贡献有价值。 count n. 计数；计算 vt. 计算；指望，依赖 vi. 计数；有价值=matter cou
14、nt nothing 一点价值都没有 count on =depend on /rely on 指望；依赖 First impression really do count. 第一印象确实很重要。 You can count on him to help you. 你可以指望他帮忙。,Practise,I. 根据句意及所给单词的首字母或汉语提示，写出所缺单词的正确形式。 The cool water r_ John after his long sleep. 2. This is a formal party so youd better not wear c_ clothes. 3. I w
15、as asked to give a short p_ on the aims of the plan.,refreshed,casual,presentation,4. The companys _ (承诺) to providing quality at a reasonable price has been vital to its success. 5. It is very difficult to see doctors, so many people _ (提倡) building more hospitals. 6. Its the best result that could be expected under the _ (情况).,circumstances,commitment,advocate,7. Youll need three large c_ of paint. 8. I got out of the car but left the m_ running. 9. They decided to set up a(n) _ (核的) power station. 10. Ill heat it up in the _(微波炉).,ans,ot
