Unit 2 Saving the Earth
Topic 3 What can we do at home to protect the environment?
Section A
【学习目标】
1.学习由连词or and, but和while连接的复合句；
2.从“减量”，“再使用”，和”再循环”的角度讨论保护环境。 【预习案】
一、在文中找到并划出下面的短语
1.环境保护_____________________________________ 2.为一个组织工作______________________________ 3.保护环境为一个组织工作_______________________ 4.我的专职工作________________________________ 5.传播信息_____________________________________ 6.循环使用塑料袋______________________________ 7.省钱_______________________________ 8.收集废纸______________________________ 9.饮料罐_____________________________ 10.一种污染__________________________________ 11.考试不及格______________________________ 12.错过公车______________________________ 13.失败几次______________________________ 14.放弃__________________________________
【探究案】 在文中划出下面的句子并分析
1.We all know that you’re working for an organization that protects the environment.
译：________________________________________________________________________________________ 思考：句中的第一个that引导 __________从句, 第二个that引导___________从句 点拨：work for… 为…工作 链接：play for --- ___________
拓展：work as --- 充当，担当 work on---从事 work out ---算出 work hard at ---在…方面工作努力 巩固：a. We should work for our motherland to make her stronger and more beautiful .
译：___________________________________________________________________________
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b. You can work as a teacher like Linda after college. 译：________________________________________
c. He is working on a special job to protect the environment. 译：______________________________________ d.Can you work out how much money it will need? 译：________________________________________
e.Work hard at English and you will make great progress soon. 译：_______________________________
2.My main job is to help spread the message about protecting the environment.
译：_____________________________________________________________________________
总结：help sb. (to) do sth.---帮助某人做某事help sb. with sth.---帮助某人某事can’t help doing sth.---禁不住做某事 练习：1.我昨天帮助我妈妈做家务活了。I _______ my mother _______ _____ __________ yesterday. 2.你能帮帮我的英语吗？ Can you _______ me ________ my English?
3.听到那个消息后，她禁不住哭了。________ _________ the news, she ________ _______ __________. 3.So we encourage students to collect waste paper and soft drink cans.
译：___________________________________________________________________________________ 点拨: encourage sb. to do sth. 鼓励某人去做某事
练习：My mother ____________ me to ___________________ the sports meeting. 我妈妈鼓励我去参加运动会。
Section B
【学习目标】
1.学习用ought to提建议；
2.从身边小事做起，师生一起保护环境，做一个环保人。 【预习案】
一、 在文中找到并划出下面的短语
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1.做一个环保人士_____________________________ 3.关灯_______________________________________ 5.骑车___________________________________ 7.乘公交车或打的______________________________ 9.节约能源____________________________________ 11.带个布袋___________________________________ 13.说起来容易做起来难__________________________
二、在文中划出下面的句子并分析
2.应该___________________________________ 4.最好走路骑车________________________________ 6.代替…________________________________ 8. 短距离旅行__________________________________ 10.减少空气污染________________________________ 12.不要使用塑料袋______________________________ 14.行动胜于语言________________________________
1.You ought to shut off the electricity when you leave a room. 译：_______________________________________________
点拨：ought to---应该，应当(情态动词，无人称，时态及数的变化) 表示责任, 义务或道义上应该…
语义同should
注意：ought to的否定形式为ought not to do sth., 缩略形式oughtn’t to
疑问形式为ought + 主语 + to do sth.? 肯定回答：Yes, 主 + ought. 否定回答：No, 主 + ought not.
ought to 的反义疑问句中，附加疑问部分用ought或should疑问
练习：a. We ought to be polite to the old. 译：____________________________________________
b.你应该帮你妈妈做些家务活。You _______ ____ _____ your mother _____ some housework. c.你不应该在墙上画画。You ______ ____ draw on the wall.
d.我应该立刻去浇花吗？________ I ______ _______ the flowers at once? e.我们应该现在出发，是吗？We _______ _____ ______ now, ________ _______? 2.You’d better walk or ride a bike instead of taking a bus or a taxi if you travel a short distance. 译：_____________________________________________________________________________
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点拨：’d better = had better 总结：had better (not) do sth. 最好(不)做某事 点拨：instead of代替，而不是 (介词短语)
练习：a.你们最好明天准时到这儿。You ________ _______ ________ here ______ _______tomorrow. b.老人最好不要开车。_____ ______ ______ ______ ______ drive cars.
c.我将代替他参加运动会。I will ______ ______ ____ the sports meet ________ _______ ______.
d.昨天晚上我去看电影了没有呆在家。
I _____ ___ ____ _______ instead of _______ at home_____ ______.
Section C
【学习目标】
1.继续学习连词引导的复合句； 2.了解现代科学技术在环保方面的作用。 【预习案】
一、在文中找到并划出下面的短语
1.用煤矿生产能源_______________________________ 2.造成酸雨_____________________________________ 3.使用核能生___________________________________ 4.全世界的人__________________________________ 5.寻找新办法___________________________________ 6.首批国家之一________________________________ 7.使用沼气技术_________________________________ 8.制沼气_____________________________________ 9.可再生能源___________________________________ 10.在人们的日常生活中_________________________ 11.主要缺点___________________________________ 12.上海世博会__________________________________ 13.最著名的磁悬浮火车_________________________ 14.达到最高时速_______________________________ 15.更贵得多___________________________________ 16.传统铁轨___________________________________ 17.用尽_______________________________________ 18.发电_______________________________________
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【探究案】 在文中划出下面的句子并分析
1.Some countries use nuclear energy to produce power. 译：_____________________________________________
点拨：use sth. to do sth.=use sth. for doing sth. ---使用某物做某事
练习：a.在过去人们使用竹子写字.People _______ bamboo ______ _______ in the past. b.人们用风发电。People _____ wind _______ producing electricity. 2. The train can reach a top speed of 431 km per hour. 译：____________________________________________ 点拨：reach a speed of+具体速度 ---达到某个速度
链接：at a speed of + 具体速度----以某个速度, 可用high, low, full等形容词修饰speed 。 练习：a.北京至天津线火车时速达到每小时300千米。
Beijing-Tianjin train travels ______ ___ _______ ____ 300 km per hour.
b.我们以每小时30英里的速度前进。We were traveling ____ _____ _______ _____thirty miles per hour.
3 It takes people just 7minutes to go to the airport 30km away. 译：__________________________________________
同义句：________________________________________________
4.However, maglev guide paths are much more expensive than traditional steel railways.
译：_______________________________________________________________________________ 点拨：形容词前可加a lot, much, far, a little ,even等词修饰；还可在形容词比较级前加表数量的词。 练习：a. Don’t go by plane. It’s a lot more expensive. 译：_______________________________________________ b. His illness is far more serious than we thought. 译：_____________________________________________
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c. It’s a little colder today than it was yesterday. 译：________________________________________________ d. It was cold yesterday, but it’s even colder today. 译：_____________________________________________ e. My sister is two years younger than me.
译：___________________________________________________
Section D
【学习目标】 1.总结复合句的用法；
2.继续学习和拓展环境保护的话题。 【预习案】
在文中找到并划出下面的短语
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1.地球的肺__________________________________ 3.制造氧气__________________________________ 5.面临许多困难______________________________ 7.寒冷潮湿__________________________________ 9.不同种类的__________________________________
2.清除二氧化碳_________________________________ 4.例如_________________________________________ 6.炎热干燥____________________________________ 8.植树者______________________________________ 10.植树_______________________________________
【探究案】 文中划出下面的句子并分析
1. In many countries, such as New Zealand, Canada, and Brazil, forests were cut down to provide wood to build houses.
译：____________________________________________________________________. 点拨：such as “例如”，列举几个例子
for example “例如”，列举一个例子，前面有逗号隔开。
练习：I have traveled many cities __________ ____________ Beijing, Shanghai and Shenzhen. I like western counties, __________ ____________ , America.
2. They plant different types of trees so that birds and animals can live in the forests.
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点拨：different types of + 可数名词的复数 “不同种类的”
我
喜
欢
不
同
种
类
的
电
影
。
____________________________________________________________.
so that引导目的状语从句，意为“以便，为了，使能够”
They got up early_______________ they could catch the early bus. 他们早早起床以便坐上早班车。
so… that…引导的是表示结果的状语从句，但不一定是“如此……以至于……”
This book is________ interesting ________everyone wants to read it.这本书如此有趣以致于每个人都想要阅读。
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