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Unit13 Were trying to save the earth!period 1 SectionA1a-2d【教学目标】知识与技能（1）熟练掌握下列词汇：1._ v.乱扔；n. 垃圾；2. _ adj. 丑陋的；3. _ n. 优点；4. _ v. 花费； 5. _ adj. 木制的； 6. _ n. 底部；7. _ n. 渔民；8._ n. 煤；9._ adj. 塑料的；10._ n. 外卖食物；11._ n. 垃圾箱（2）熟练掌握下列短语： 1._ the river在河床底部 2. _ the rubbish充满了垃圾 3. _the river把垃圾扔入河中 4. _ cleaning it up尽一份力把它清理干净 5. _土地污染 6. _black smoke使空气中充满了黑烟 7. _减少空气污染8. _产生影响 （3）掌握下列句型：1. Everyone in town _.城里的每个人都应当尽一份力把它清理干净。 2. The air _ because there are _ 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 _ air pollution, we should take the bus or subway_.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 _ stars in the sky.我过去能在天空中看到星星。5. The air _ around here. Im getting very worried.这儿的空气真的已经被污染了，我非常担心。过程与方法讨论身边的污染和环境保护，听力练习，角色对话情感、态度与价值观忧虑环境污染，重视环境保护【教学重难点】重点：听力练习，复习进行时，情态动词，used to难点：听力训练【导学过程】一新课预习 通过预习，根据课本内容完成以上教学目标的词汇短语句型 二. 情景导入给学生播放一些有关环境污染的图片或视频，然后询问学生对环境污染的看法和观点。Teacher: What kinds of pollutions do you know？ What do you feel about the pollution?Students: I think there are_. noise pollution air pollutionwater pollution通过图片、视频和课前的一个师生问答互动引入新课的话题三合作探究Step 1 完成教材1a-1c的任务1.学生阅读1a部分的内容。把方框中的单词按它们产生污染的类型写入相应的栏目中，并添加更多的单词。2. 检查答案，全班一起给出答案并检查讨论。3.听第一遍录音，并根据听到的内容完成课本上1b表格中的句子。 4. 听第二遍录音，并逐句进行跟读。5. 完成教材1c的任务，学生模仿1a内容，编造自己的关于污染的对话并进行对话练习。请2-3对同学当堂进行演示。Step 2 完成教材2a-2c的任务1.播放录音第一第二遍，完成2a，2b的听力任务，统一核对答案。2.听第三遍录音，并逐句进行跟读。3.学生模仿听力内容，利用2a，2b的信息分角色练习Jason与 Susan的对话。请2-3对同学当堂演示。看哪一对的表现最佳。4. 播放2d的对话录音，让学生跟读。然后让学生分角色朗读并表演2d的对话。四点拨总结【cost】 vt.1. 花费；价格为；值：例句: It must cost a good deal to live here.住在这里一定要花很多钱的【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。(2) spend time money (in) doing sth. 花费时间（金钱）做某事。例：They 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了这些单词。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：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。To cut down 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。本句中【To cut down air pollution】是【动词不定式作目的状语】。动词不定式做目的状语时的用法一、不定式和不定式短语作目的状语 不定式和不定式短语作目的状语，主要用来修饰动词，表示某一动作或状态的目的。为了使目的意义更加清楚或表示强调意义时，还可以在前面加 in order to 或 so as to。例如： Ive written it down in order not to forget. He shouted and waved so as to be noticed. 在句子中作谓语动词的状语的不定式或不定式短语，表示的是主语的目的，因此，其逻辑主语通常是句子的主语。比较： To draw maps properly, you need a special pen.(正) To draw maps properly, a special pen is needed.(误) 由 in order to 引导的目的状语，既可以置于句尾，也可以置于句首，而由 so as to 引导的目的状语，只能置于句尾，而不能置于句首。比较： They started early in order to get there in time.(正) In order to get there in time, they started early.(正) They started early so as to get there in time.(正) So as to get there in time, they started early.(误) 二、不定式的复合结构作目的状语 当不定式或不定式短语有自己的执行者时，要用不定式的复合结构(即在不定式或不定式短语之前加 for + 名词或宾格代词)作状语。例如： He opened the door for the children to come in. She fetched several bottles which she placed on the counter for Harry to inspect.五训练评价 根据提示完成单词。1. We should put up notice to stop from l_。2. The teacher asked us to find a way to pickup the coins at the b_of the bottle.3. There are no more fish for f_to catch in the river.4. We should take the paper bags to go shopping instead of the p_ ones.5. Could you please tell us another a_ of riding bike to work?用所给词的适当形式填空。1. There are many kinds of p_（pollute）in our daily life.2. All of the students should take part in k_ (keep) our school clean and tidy.3. Can you tell us your ideas for i_ (improve) your spoken English.4. We should stop using the w_ (wood) chopsticks to protect the forest.5. Their grandparents were f_ (fisherman) near the sea before they moved to the town.单项选择1. How much is the ticket to Central Park?A one-way ticket _ $40, and you can _ another $20 for a round-trip.A. costs, payB. cost, spend C. pay, spend D. spends, pay2. Why is Linlin practicing speaking English? _ abroad for further study. A. Go B. Gone C. To go D. Goes 3. Im new here. Dont worry. Ill do what I can _ you. A. helpB. to helpC. inviteD. to invite六学习反思开心 ，我学会了： 1. 2. 3. 加油 ，这些我还不懂： 1. 2. 3.
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