Unit 13 We’re trying to save the earth.学案（打包6套）

Unit 13 We’re trying to save the earth! Section A (1a—2d) 【学习目标】 1. 学习并掌握下列单词：litter, bottom, fisherman, coal, public, ugly, advantage, cost, wooden, plastic21cnjy.com 2. 能正确使用以下常用表达： the bottom of, be full of, used to do sth., play a part in doing sth., clean it up, be badly polluted, too much rubbish and waste, turn…into , cut down, take the bus or subway, instead of, remember to do sth., make a difference, lead to21·cn·jy·com 3. 能熟练掌握并使用下列重点句式： 1) Even the bottom of the river was full of rubbish.2·1·c·n·j·y 2) It used to be so clean! 3) Everyone in this town should play a part in cleaning it up!【来源：21·世纪·教育·网】 4) The air has become really polluted around here. I’m really getting worried. 5) To cut down air pollution, we should take the bus or subway instead of driving. 6) Our actions can make a difference and lead to a better future!【版权所有：21教育】 【重点难点】 ·Talk about pollution and environmental protection.21*cnjy*com ·Use what we have learned to talk about pollution and environmental protection. 【新知预习】 I. 根据句意及词首字母完成单词。 1. Even the b_____ of the river was full of rubbish. 2. People are l_____ in the river. 3. Other a_____ of bike riding are that it’s good for health and it doesn’t cost anything! 4. I never take w_____ chopsticks or plastic forks when I buy takeaway food. 5. Our actions can make a d_____ and lead to a better future! 【课堂探究】 1. used to… (1) used to的意思是“过去经常”，其中的to是不定式符号，不是介词，所以其后接动词原形(不接动名词)。如：He used to live in Paris.?他过去一直住在巴黎。21*cnjy*com (2) used to?与?be used to的用法比较 ·used to?意为“过去经常”，其中的?to?是不定式符号，后接动词原形。 如：He used to live in Paris.?他过去一直住在巴黎。 ·be used to?意为“习惯于”，其中的to是介词，后接动名词。 如：He is used to living in the country.?他已习惯于住在乡下。 【针对练习】用used to和be used to填空 I _____ get up late, but now I _____ getting up early.【来源：21cnj*y.co*m】 2. should的用法：should后接动词原形。 1）表示“应该，应当” You should help your mother with the housework. 你应该帮你母亲做家务。21教育名师原创作品 2）表示“可能，该(=will probably) ”He should arrive soon他可能很快就到了。 3) should与ought to的比较 · 除表示“万一”“竟然”等只能用should外，表示“应该，应当”“可能”等，两者可互换，只是ought to的语气稍重。如：You ought to/should work harder than that. 你应当更努力地工作。 · should 强调主观看法，而 ought to 强调客观要求。如：We ought to go and see my mother in hospital tomorrow, but I don’t think we will. 我们按理应当在明天去看看住院的母亲的，但我主认为我们不会去。【出处：21教育名师】 【针对练习】Everyone in this town_____ play a part in cleaning it up! 【达标练习】 I. 单项选择。 ( ) 1. My father _____ a doctor, but now he is a writer. A. was used to be B. used to be C. is used to be D. was used to being ( ) 2. Look! _____ people_____? A. Does, litter B. Are, littering C. Did, litter D. Were litteri ... ...