课件21张PPT。Unit 4 Global warming 1, What is the greenhouse made of and used for?2,How does it work?3,What are the “greenhouse gases”?4,What do you think greenhouse
gases do?Step1;warming upⅠ.单词拼写 根据音标及词义写出英文单词。
1.________ ['r?nd?m] adj. 胡乱的;任意的
2. ________ ['fju??l] n. 燃料
3. ________ [p??]prep. 每;每一
4. ________ ['deIt?,'da?t?] n. 资料;数据
5. ________ [fl?d] n. 洪水;水灾v.淹没
6. ________ [maIld] adj. 温和的;温柔的
7. ________ [steIt] n. 州;国vt.陈述;说明randomfuelperdatafloodmildstateStep2 8. ________ [reInd?] n. 种类;范围
9. ___________ ['waIdspred] adj. 分布广的
10. ________ ['?v?rId?] adj. 平均的
11. ________ ['?dv?keIt] vt. 提倡;主张
12. ________ [I'lektrIkl] adj. 电的
13. ________ [rI'fre?] vt. 使恢复;使振作
14. ________ ['nju?klI?] adj. 核的;核能的rangewidespreadaverageadvocateelectricalrefreshnuclearⅡ.单词拓展 写出下列单词及其派生词。
1. ________ vt. 消费;消耗;耗尽;吃完
_________ n. 消费者
2. ____________ n. 结果;后果;影响
___________ adj. 随之发生的;作为结果的
_____________ adv. 所以;因此;结果
3. ________ adj. 平稳的;持续的;稳固的
________ adv. 平稳地;持续地consumeconsumerconsequenceconsequentconsequentlysteadysteadily4. ________ v. 污染
________ n. 污染
5. ________ v. 增长;生长
________ n. 增长;生长
6. ________ v. 教育
________ n. 教育工作者
_________ n. 教育pollutepollutiongrowgrowth educateeducatoreducation1.The air conditioners of this type consume too much electricity. Many consumers complain about this. (consume)
2.They contributed a lot of food and clothing to the refugees(难民) and their contributions will certainly help the refugees live through the winter. (contribute)
3.The young man whose parents are both educators is well educated, and his parents received good education in a foreign country.(educate)
4.We__________with each other on the matter,but it is urgent to reduce the ___________,for we don’t have much time left.(agree)
disagreedisagreementStep3:Test yourself 1.发生;造成
2. 同意;赞成;订购
3.大量的
4.上升;增长;升起
5.导致
6.反对……
7. 即使
8.继续
9.大体上;基本上
10.代表……一方;作为……的代言人
11.忍受;容忍
12.只要
13.等等
come about
subscribe to
quantities of
go up
result in
be opposed to
even if
keep on
on the whole
on behalf of
put up with
so long as
and so onStep4go up;result in;be opposed to;so long as;come about;subscribe to;put up with;glance at;on behalf of;on the whole1.I don’t know how it came about that she came late on Mondays.
2.It’s my honor to give a speech to the advanced teachers here on behalf of my company.
3.There were one or two unsatisfactory moments,but on the whole our holiday was very enjoyable.
4.The noise coming from outside is reaching a point where we will no longer be able to put up with it.
5.Jacobs does not subscribe to the belief that people are basically good.Step5:Test yourselfgo up;result in;be opposed to;so long as;come about;subscribe to;put up with;glance at;on behalf of;on the whole6.He glanced at me but he kept on talking with the others,putting me in an embarrassing situation.
7.The car crash resulted in three people being killed and one injured.
8.The price of oil has gone up by over 50 percent in less than a year.
9.At first they were opposed to the scheme,but we managed to argue them round.
10.I don’t care about the price,so long as the car is in good condition.1.There is no doubt that the earth is becoming warmer (see Graph 1)and that it is human activity that has caused this global warming rather than a random but natural phenomenon.
2.Even if we start reducing the amount of carbon dioxide and other greenhouse gases,the climate is going to keep on warming for decades or centuries.
3.It is OK to leave an electrical appliance on so long as you are using it-if not,turn it off!
Step61.There is no doubt that the earth is becoming warmer (see Graph 1)and that it is human activity that has caused this global warming rather than a random but natural phenomenon.毫无疑问,地球正在变暖。而地球变暖正是人类活动导致的,并非是一种无规律的自然现象。
[解读] There is no doubt that...毫无疑问,that引导同位语从句。
[仿写] 毫无疑问,收音机和电视机是信息交流的重要方式。
There is no doubt that radio and television are important means of communication.Step62.Even if we start reducing the amount of carbon dioxide and other greenhouse gases,the climate is going to keep on warming for decades or centuries.
即使我们开始减少二氧化碳和其他温室气体的含量,在未来几十年或几个世纪内,气候仍会持续转暖。
[解读] even if即使;尽管,引导让步状语从句。
[仿写] 工程师们如此忙碌,以至于没时间做户外活动,即使他们对做户外活动很感兴趣。
The engineers are so busy that they have no time for outdoor sports activities,even if they have the interest.3.It is OK to leave an electrical appliance on so long as you are using it-if not,turn it off!只要你在使用电器设备,你可以让它开着。如果不用就把它关掉!
[解读] so long as=as long as只要,引导条件状语从句。
[仿写] 只要我们不失去信心,继续努力,我们一定能克服困难,实现目标。
As long as we don’t lose heart and keep on trying,we are sure to get over difficulties,and achieve our aims.
There was a big flood that _____in Zhang village, and it _____great damage to people. There was no doubt that the flood tended to destroy the whole village ___they tried their best to deal with it. The villagers couldn’t _____the suffering and then the head of the village turned to their neighbor Wang village for help. At first , they ______________helping them. Later. Seeing the water level__________________. They __________ providing _____________disaster relief. They offered them clothes, food ,__________. It took them two days to control the flood_________. . _____________Zhang villagers, the head said thanks to Wang villagers’ help. After that they realized that it is easy to come over any difficulty _________________they can unite. (By Amina)came about resulted in even if put up with were opposed to keeping on going upsubscribed to quantities of and so onon the wholeOn behalf of so long as Step7 短语句型串成篇Group work(12minutes),
Write a short passage with at least5 key phrases and a sentence pattern revised above (groups of four :a group leader, a reporter, a writer, an assistant)
Step 8 Challenge yourself1,Ask the reporter of each group to show their group work on the slide show.
2, The teacher help the students to correct the mistakes, if any.Step9 Show your work1,Polish and perfect your composition in your exercise book.
2.Recite the key phrases and sentence patterns revised today.Step10 Homework
Thank you for your listening!
Bye-bye!