1、=【 ;精品教育资源文库 】 = Unit 13 Were trying to save the earth 【 学习目标 】 1、熟记本节单词，达到灵活运用。 2、熟记重点单词的用法，并能组词、造句。 【预习?合作?探究】 1. 重点词组 1. at the bottom of the river 在河床底部 2. be full of the rubbish 充满了垃圾 3. throw litter into the river 把垃圾扔入河中 4. land pollution 土地污染 5. play a part in cleaning it up 尽一份力把它清理干净 6. fi
2、ll the air with black smoke 使空气中充满了黑烟 7. cut down air pollution 减少空气污染 8. make a difference 产生影响 2. 重点句子 1. Everyone in town should play a part in cleaning it up.城里的每个人都应当尽一份力把它清理干净。 2. The air is badly polluted because there are too many cars on the road these days.空气被严重污染因为如今路上的汽车太多了。 3. To cut do
3、wn air pollution, we should take the bus or subway instead of driving.为了减少空气污染，我们应当乘坐公汽或地铁而不是开车。 4. I used to be able to see stars in the sky.我过去能在天空中看到星星。 5. The air has become really polluted around here. I m getting very worried.这儿的空气真的已经被污染了，我非常担心。 3. 重要知识点 cost vt.1. 花费；价格为；值： 例句 : It must cost
4、 a good deal to live here. 住在这里 一定要花很多钱的 拓展 ： take， spend ， cost ， pay 的用法都可以表示 “ 花费 ” ，但用法却不尽相同。 1. spend 的主语必须是人， 常用于以下结构： (1) spend time money on sth. 在 ? 上花费时间（金钱）。 例： I spent two hours on this maths problem. 这道数学题花了我两个小时。 =【 ;精品教育资源文库 】 = (2) spend time money (in) doing sth. 花费时 间（金钱）做某事。 例： Th
5、ey spent two years (in) building this bridge. 造这座桥花了他们两年时间。 (3)spend money for sth. 花钱买 ? 。 例： His money was spent for books. 他 的钱用来买书了。 2. cost 的主语是物或某种活动， 还可以表示 “ 值 ” ， 常见用法如下： (1)sth. costs (sb.) 金钱 ,某物花了（某人）多少钱。 例： A new computer costs a lot of money. 买一台新电脑要花一大笔钱。 (2) (doing) sth. costs (sb.) 时
6、间 ,某物（做某事）花了（某人）多少时间。 例： Remembering these new words cost him a lot of time. 他花了大量时间才记住这些 单词。 注意： cost 的过去式及过去分词都是 cost,并且不能用于被动句。 3. take 后面常跟双宾语， 常见用法有以下几种： (1) It takes sb. 时间 to do sth. 做某事花了某人多少时间。 例： It took them three years to build this road. 他们用了三年时间修完了这条路。 (2)doing sth. takes sb. 时间 ,做某事花了
7、某人多少时间。 例： Repairing this car took him the whole afternoon. 他花了一下午修车。 4. pay 的基本用法是： (1) pay (sb.) money for sth. 付钱（给某人）买 ? 。 例： I have to pay them 20 pounds for this room each month. 我每个月要付 20 英磅的房租。 (2)pay for sth. 付 ? 的钱。 例： I have to pay for the book lost. 我不得不赔丢 失的书款。 (3)pay for sb. 替某人付钱。 例：
8、Don?蒺 t worry!Ill pay for you. 别担心，我会给你付钱的。 (4)pay sb. 付钱给某人。 例 : They pay us every month.他们每月给我们报酬。 (5) pay money back 还钱。 例： May I borrow 12 yuan from you? Ill pay it back next week. 你能借给我 12 块钱吗？下周还你。 (6)pay off ones money 还清钱。 【形成性检测】 一、根据汉语提示完成单词。 1. We should put up notice to stop from _ (乱扔）。
9、 2. The teacher asked us to find a way to pick up the coins at the _ (底部） of the bottle. 3. There are no more fish for _(渔夫） to catch in the river. =【 ;精品教育资源文库 】 = 4. We should take the paper bags to go shopping instead of the _(塑料） ones. 5. Could you please tell us another _(优点） of riding bike to
10、work? 二、用所给词的适当形式填空。 1. There are many kinds of _（ pollute） in our daily life. 2. All of the students should take part in _(keep) our school clean and tidy. 3. Can you tell us your ideas for _(improve) your spoken English. 4. We should stop using the _(wood) chopsticks to protect the forest. 5. Their grandparents were _ (fisherman) near the sea before they moved to the town. How much is the ticket to Central Park? A one-way ticket _ $40, and you can _ another $20 for a round-trip. A. costs, pay B. cost, spend C. pay, spend D. spends, pay
