unit 13 we're trying to save the earth! 導學案

1、Unit 13 We're trying to save the earth!第一課時 第一課時 Section A(1a－2d)Target Navigation 【目標導航】Key words and phrases：litter，bottom，fisherman，coal，ugly，advantage，cost，wooden，plastic，make a differenceKey sentences：(1)The ri

2、ver was dirty.Even the bottom of the river was full of rubbish.(2)It used to be so clean.(3)People are throwing litter into the river.(4)Everyone in this town should play a part in cleaning it up!(5)I used to be able to

3、see stars in the sky.Skills：能聽懂關于污染的問題和環(huán)境保護的話題；并初步學會用重點句型談論污染和環(huán)保的話題。Emotion：通過聽說訓練學會談論污染和環(huán)保的話題，使學生認識到污染的嚴重性，從而培養(yǎng)學生養(yǎng)成愛護環(huán)境，保護環(huán)境的習慣。The guidance of learning methods 【學法指導】聽說法；小組合作。Learning important and difficult points 【學習

4、重難點】1．能聽懂關于污染的問題和環(huán)境保護的話題；并初步學會用重點句型談論污染和環(huán)保的話題。2．掌握并運用 Key sentences 中的重點句型。Teaching Steps 【教學過程】Autonomous Learning Scheme【自主學習方案】?預習指導與檢測(一)預習指導Jason：The air has become really polluted around here.I'm getting very w

5、orried.Susan：Yes，I used to be able to see stars in the sky.Jason：The problem is that…【探究六】小組合作完成 2d。1．學生自讀，找出疑惑。2．老師解疑并教讀對話。3．師生、生生分角色扮演對話。【知識點撥】1．The air has become really polluted around here.這兒的空氣已經(jīng)被污染了。辨析：turn，get 與

6、become(1)become 多指身份、職位等的變化，它強調(diào)變化的過程已經(jīng)完成，后面可接名詞或形容詞。如：He becomes a teacher.他成了一名老師。(2)get 多用于口語，表示一種變化過程，強調(diào)的是“漸漸變得”，后常接形容詞的比較級形式。如：In winter the days get shorter.冬季白天變得較短。(3)turn 指在顏色和性質(zhì)等方面與以前的完全不同，強調(diào)變化的結(jié)果。如：Leaves turne

7、d brown in the mountains.山里的樹葉已變成了棕色?！拘≡嚺５丁坑?turn，get 和 become 填空。①Her mother ________ angry when she heard the news.②It's ________ darker and darker outside.③The milk has ________ bad.(Keys：①became；②getting；③turned)

8、2．To cut down air pollution，we should take the bus or subway instead of driving.為了減少空氣污染，我們應該乘坐公共汽車或者地鐵，而不是開車。cut down 意為“減少”，是“動詞＋副詞”結(jié)構的短語，所帶的賓語為名詞時，賓語可位于 down 的前面或后面；為代詞時，只能位于 down 前面。如：You'd better cut the article