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1、Unit 2 Saving the earth Topic 3知识点汇编（一）词形变换1. organization(动词) organize 2.recycle(动名词) recycling 3. follow(形容词) following 4.electricity(形容词) electric5. move(名词) movement 6. quick(副词) quickly7. environment(形容词) environmental 8. protect(名词) protection（二）重点词组1. environmental protection 环境的保护2. work for
2、 为工作3. spread message about 宣传有关4. reduce the waste/ air pollution 减少浪费/ 空气污染5. both sides of 的两面6. rather than (是)而不是.7. not onlybut also 不仅.而且8. save money/ energy/ electricity 省钱/ 能源/ 电9. be supposed to do sth. 应当做某事10. travel a short distance 短途旅行11. putinto 把放入12. take up a lot of space 占据许多空间1
3、3. produce power from 从获得能量14. run the car 发动汽车15. pushforward /up /down 推.向前/向上/向下16. power machines 发动机器17. produce electricity by doing sth. 通过做某事发电18. the movement of water 水的流动19. be used for doing sth 被用作做某事 20. take a quick shower 快速淋浴21. make a short journey 短途旅行22. pick the litter up 捡起垃圾23
4、. try harder 再努力24. produce a short oral report 作一个简短的口头报告二、重点句型1Lets be greener people. 让我们做环保使者吧。2my main job is to help spread message about protecting the environment. 我主要的工作是帮助做有关保护环境的宣传。3Its kind of you to do that. 你那样做真是太好了。4Would you like to be a greener person? 你想成为一名绿色使者吗？5Easier said than
5、 done. 说得容易，做得难。6Actions speak louder than words. 百说不如一干；事实胜于雄辩。7Of all the rubbish, about 35 percent can be recycled while the rest cant. 在所有的垃圾里，大约35%能被回收，但剩余的则不能。8. They work well, but they are slow and cant run for long. 他们行驶得很好，但他们行驶很慢并且不能远距离行驶。三、重点语言点1. We all know that youre working for some
6、organizations that protect the environment. 我们都知道你在为环保组织工作。work for 表“为工作”He works for a foreign company in Shanghai. 他在上海为一家外资公司工作。2. We should use both sides of paper, and reuse plastic bags rather than throw them away. 我们应该把纸的两面都使用，将塑料袋再次使用而不是轻易扔掉。a) both 修饰复数名词；而 either 修饰单数名词； 如：There are a lot
7、 of trees on both sides of the road.= There are a lot of trees on either side of the road. 在路的两边有许多树。b) rather than 表“（是）而不是”;连词, 连接对等结构, 相当于instead of如: I like coffee rather than tea. = I like coffee instead of tea. 我喜欢咖啡而不是茶. He likes listening to music rather than/ instead of singing. 他喜欢听音乐而不是唱歌
8、. He wants to go today rather than/ instead of tomorrow. 他想今天走而不明天. I did my homework rather than watched TV. = I did my homework instead of watching TV. 昨晚我做作业了而不是看电视. 但rather than位于句首时, 后跟动词原形,它不受句中谓语动词的时态影响。如： Rather than do it by myself, I didnt ask for help.宁可自己干, 我没请人帮忙。3. Everyone is supposed
9、 to do it. 每个人都应该那样做。be supposed to do sth.指（按规定、习惯、安排等）应当做某事；必须做某事；相当于should; 用于否定句时，表“允许”； 如：Teachers are supposed to/ should know a lot. 老师应该知道很多。You are not supposed to smoke here. 这里不允许抽烟。4. First, you ought to turn off the lights when you leave a room. 首先，当你离开房间的时候，应该随手关灯。ought to 情态动词, 表 “应该;
10、 应当”; 语气比 should 强;指道义上应该做的事,有时含有责备或督促的语气。should 指主观上感到有责任或义务去做。如：You ought to help your mother do some housework.你应该帮你妈妈做些家务。We should study hard.我们应该努力学习。其否定式和疑问式：You oughtnt to get up so late in the morning.你早晨不应该起这么晚。Ought I to tell her the bad news? 我该告诉她坏消息吗？Yes, you ought. No, you oughtnt.四、重
11、点语法 并列句：是由并列连词把两个或两个以上的简单句连在一起构成的句子，连词前可用逗号，也可不用逗号。1表示并列关系，常用连接词有and, not onlybut also等。如： His father is a teacher and his mother is a doctor. 他的父亲是一位老师，母亲是一位医生。 Mr. Green can not only drive a car but also repair it. 格林先生不但会开车而且还能修车。2表示转折，常用连词有but, while等。如： I bought my sister a present, but she did
12、nt like it. 我给妹妹买了一件礼物，但是她并不喜欢。 Tom does housework every day while his sister does nothing. 汤姆每天都做家务活，而他的妹妹什么也不做。3表示选择关系，常用连词有or, eitheror等。如： He speaks French, or perhaps he understands it. 他会讲法语，或者懂法语。 Either he could not come or he did not want to. 他要么是不能来要么是不想来。1. 表示因果关系，常用连词有so, for等。如：Her mother is ill, so she has to stay at home and look after her mother.她母亲病了，所以她不得不呆在家里照看她。The ground is very wet, for it rained last night. 地面很湿，因为昨晚下雨了。
