1、Unit 2 Saving the EarthTopic 3 What can we do at home to protect the environment?Section A【學習目標】1.學習由連詞or and, but和while連接的復合句；2.從“減量”，“再使用”，和”再循環”的角度討論保護環境。【預習案】一、在文中找到并劃出下面的短語41.環境保護_ 2.為一個組織工作_3.保護環境為一個組織工作_ 4.我的專職工作_5.傳播信息_ 6.循環使用塑料袋_7.省錢_ 8.收集廢紙_9.飲料罐_ 10.一種污染_ 11.考試不及格_ 12.錯過公車_13.失敗幾次_ 14.放棄_

2、【探究案】 在文中劃出下面的句子并分析1.We all know that youre working for an organization that protects the environment.譯：_思考：句中的第一個that引導 _從句, 第二個that引導_從句點撥：work for 為工作 鏈接：play for - _拓展：work as - 充當，擔當 work on-從事 work out -算出 work hard at -在方面工作努力鞏固：a. We should work for our motherland to make her stronger and mo

3、re beautiful . 譯：_ b. You can work as a teacher like Linda after college. 譯：_ c. He is working on a special job to protect the environment. 譯：_ d.Can you work out how much money it will need? 譯：_ e.Work hard at English and you will make great progress soon. 譯：_2.My main job is to help spread the mes

4、sage about protecting the environment.譯：_總結：help sb. (to) do sth.-幫助某人做某事help sb. with sth.-幫助某人某事cant help doing sth.-禁不住做某事練習：1.我昨天幫助我媽媽做家務活了。I _ my mother _ _ _ yesterday. 2.你能幫幫我的英語嗎？ Can you _ me _ my English? 3.聽到那個消息后，她禁不住哭了。_ _ the news, she _ _ _.3.So we encourage students to collect waste

5、paper and soft drink cans.譯：_點撥: encourage sb. to do sth. 鼓勵某人去做某事練習：My mother _ me to _ the sports meeting. 我媽媽鼓勵我去參加運動會。Section B【學習目標】1.學習用ought to提建議；2.從身邊小事做起，師生一起保護環境，做一個環保人。【預習案】一、 在文中找到并劃出下面的短語1.做一個環保人士_3.關燈_5.騎車_7.乘公交車或打的_9.節約能源_11.帶個布袋_13.說起來容易做起來難_2.應該_4.最好走路騎車_6.代替_8. 短距離旅行_10.減少空氣污染_12.

6、不要使用塑料袋_14.行動勝于語言_二、在文中劃出下面的句子并分析1.You ought to shut off the electricity when you leave a room.譯：_點撥：ought to-應該，應當(情態動詞，無人稱，時態及數的變化) 表示責任, 義務或道義上應該語義同should注意：ought to的否定形式為ought not to do sth., 縮略形式oughtnt to疑問形式為ought + 主語 + to do sth.? 肯定回答：Yes, 主 + ought. 否定回答：No, 主 + ought not. ought to 的反義疑問句

7、中，附加疑問部分用ought或should疑問練習：a. We ought to be polite to the old. 譯：_b.你應該幫你媽媽做些家務活。You _ _ _ your mother _ some housework.c.你不應該在墻上畫畫。You _ _ draw on the wall.d.我應該立刻去澆花嗎？_ I _ _ the flowers at once? e.我們應該現在出發，是嗎？We _ _ _ now, _ _?2.Youd better walk or ride a bike instead of taking a bus or a taxi if

8、 you travel a short distance. 譯：_點撥：d better = had better 總結：had better (not) do sth. 最好(不)做某事 點撥：instead of代替，而不是 (介詞短語) 練習：a.你們最好明天準時到這兒。You _ _ _ here _ _tomorrow. b.老人最好不要開車。_ _ _ _ _ drive cars. c.我將代替他參加運動會。I will _ _ _ the sports meet _ _ _. d.昨天晚上我去看電影了沒有呆在家。I _ _ _ _ instead of _ at home_ _

9、. 6Section C【學習目標】1.繼續學習連詞引導的復合句；2.了解現代科學技術在環保方面的作用。【預習案】一、在文中找到并劃出下面的短語1.用煤礦生產能源_ 2.造成酸雨_3.使用核能生_ 4.全世界的人_5.尋找新辦法_ 6.首批國家之一_7.使用沼氣技術_ 8.制沼氣_9.可再生能源_ 10.在人們的日常生活中_11.主要缺點_ 12.上海世博會_13.最著名的磁懸浮火車_ 14.達到最高時速_15.更貴得多_ 16.傳統鐵軌_17.用盡_ 18.發電_【探究案】 在文中劃出下面的句子并分析1.Some countries use nuclear energy to produce

10、 power. 譯：_點撥：use sth. to do sth.=use sth. for doing sth. -使用某物做某事 練習：a.在過去人們使用竹子寫字.People _ bamboo _ _ in the past. b.人們用風發電。People _ wind _ producing electricity.2. The train can reach a top speed of 431 km per hour. 譯：_點撥：reach a speed of+具體速度 -達到某個速度鏈接：at a speed of + 具體速度-以某個速度, 可用high, low, fu

11、ll等形容詞修飾speed 。練習：a.北京至天津線火車時速達到每小時300千米。Beijing-Tianjin train travels _ _ _ _ 300 km per hour. b.我們以每小時30英里的速度前進。We were traveling _ _ _ _thirty miles per hour.3 It takes people just 7minutes to go to the airport 30km away. 譯：_同義句：_4.However, maglev guide paths are much more expensive than traditio

12、nal steel railways.譯：_點撥：形容詞前可加a lot, much, far, a little ,even等詞修飾；還可在形容詞比較級前加表數量的詞。練習：a. Dont go by plane. Its a lot more expensive. 譯：_ b. His illness is far more serious than we thought. 譯：_ c. Its a little colder today than it was yesterday. 譯：_ d. It was cold yesterday, but its even colder tod

13、ay. 譯：_ e. My sister is two years younger than me. 譯：_ 10Section D【學習目標】1.總結復合句的用法；2.繼續學習和拓展環境保護的話題。【預習案】 在文中找到并劃出下面的短語1.地球的肺_3.制造氧氣_5.面臨許多困難_7.寒冷潮濕_9.不同種類的_2.清除二氧化碳_4.例如_6.炎熱干燥_8.植樹者_10.植樹_【探究案】 文中劃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 prov

14、ide wood to build houses.譯：_.點撥：such as “例如”，列舉幾個例子 for example “例如”，列舉一個例子，前面有逗號隔開。練習：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.點撥：different types of + 可數名詞的復