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Unit 13 We’re trying to save the earth!要点详解1. We’re trying to save the earth!我们正尽力拯救地球！(1) 本句时态为现在进行时，表示现阶段正在做的事情。
现在进行时所表示的动作并不一定在说话人的说话时刻进行，而是在包括说话时刻在内的一段时间当中进行。
例如：George is translating a book now. 乔治现在在翻译一本书。
（说这句话时，乔治不一定正在翻译；但在包括“说话时刻”在内的一段时间当中，乔治是在从事翻译工作。
）(2) try to do 表示“设法或尽力去做某事”，实际上做与不做，视情况而定，而try doing表示“试着做”，即动作真的进行了或正在进行，成败则视结果而定。
例如：He tried to read, but he was too tired to read much.他想设法看书，但太疲倦了，没看多少。
He tried reading, but that could not make him forget his trouble.他试着看书，但这并没使他忘记烦恼。
2. I am like this animal because I am strong and intelligent.我像这种动物，因为我强壮而聪明。
(1) like在本句中做介词，意为“像”，例如：He looks like winning the race.他看来要在比赛中获胜。
She is like her mother.她像她的妈妈。
(2) like做介词时可用very，very much，rather，quite等副词修饰。
例如：You look very much like your father.你与你父亲很相像。
3. Some of the swamps have become polluted。
一些沼泽已被污染了。
Unit 13 We’re trying to save the earth教材分析本单元带领学生了解了一些有关地球污染，动物濒危等问题。
并且教给大家如何保护濒危动物，如何通过回收利用等方式来保护地球。
本单元主要复习语法内容为情态动词和动词形式变化。
本课主要带领大家进行语法复习，巩固语法知识。
一、三维目标(一) 知识与技能1. To learn different forms of verb.2. To understand the use of Modal Verbs.(二) 过程和方法3. To know how to use different forms of verb in different situations.4. To know how to use Modal Verbs in different situations.(三) 情感态度和价值观5. After learning this part, every student will be able to describe theirawareness of the serious situation of pullution and solutions to environmental problems using what we have learned in this lesson.教学重点1. To change forms of verb according to specific situation.2. To use Modal Verbs properly.教学难点1. To change forms of verb according to specific situation.2. To use Modal Verbs properly.二、教学策略根据本课教学目标和重点内容，教师可采用读，小组讨论，口头及书面练习等活动来引导学生进行学习。
Unit 13We're trying to save the earth!本单元围绕环境保护的话题，并用主题图片表现噪音污染、空气污染、水污染等内容，目的是为了让学生对环境的破坏有一个直观的认识，从而激发学生强烈的社会责任感和对未来发展的思考。
Section A的重点是让学生掌握与环境污染和环境保护相关的词汇和句型，同时引导学生关爱动物、保护环境。
教学难点是让学生学会正确使用连词和结合生活实际讲述如何保护环境。
Section B在Section A所学的基础上，进一步谈论如何保护环境。
教学重点是让学生了解环境保护的方式，并落实到积极的行动当中，同时还有阅读策略和写作技巧的训练。
教学难点是让学生在阅读2a文章之后，根据所给词根找出衍生出的不同词汇，并理解前缀和后缀的不同用法。
The First Period—Section A(1a－2d)Teaching Important Points【教学重点】Key words & phrases：litter，bottom，fisherman，coal，ugly，advantage，cost，wooden，plasticnoise pollution，air pollution，water pollution，be full of，play a part in，turn…into，cut down air pollutionKey sentences：1.Even the bottom of the river was full of rubbish.2.It used to be so clean.3.Everyone in this town should play a part in cleaning it up.4.The air is badly polluted because there are more cars on the road these days.5.The air has become really polluted around here.6.We're trying to save the earth.Key structure：should＋do；used to＋do；have/has＋done；be＋done；be＋doinge．g.Everyone should help to clean up the river.The air has become really polluted.I used to be able to see stars in the sky.The air is badly polluted.Teaching Difficult Points【教学难点】★Practice the structures to talk about pollution and environmental protection.Teaching Aids【教学工具】A tape recorder，CAI or multimedia courseware.Teaching Steps【教学过程】★Step 1Leading in【新课导入】1．Greeting2．Discussion and reviewDiscuss with the students，like this：T：What kinds of pollution are there these days?S：…T：What causes the pollution?S：…3．Review the words and expressions about the topic.★Step 2Cooperative inquiry【合作探究】1．Finish the task in 1a①Show pictures or play videos about pollution and talk about the pollution.②Read these phrases in 1a.Look at the pictures in 1a and say what they see in the pictures.Write down the words and add more words.③Ask students to say out their words in each kind of pollution.2．Finish the task in 1b①Read the instructions.Get the students to read the contents in the chart and think of what they will fill in the blanks.②Play the recording for the first time.Students listen and fill in the words.③Play the recording a second time.Ask them to check the answers.Then ask the questions.Students answer with full sentences.④Ask more questions to help students learn more details.Then play the recording for the students to role－pay the conversation.3．Finish the task in 1c①Show the key words of the conversation.Ask students to retell the contents in the chart.Like this：What：dirty；bottom，rubbish；fishWhy：littering，putting wasteHow：write to，close down；help to clean up②Read aloud the model dialogue in 1c.Then in pairs，do the oral practice with more words.③Ask two pairs to perform in class.4．Finish the tasks in 2a－2b①Use PPT or pictures to show the four kinds of pollution.Get the groups of students to havea competition to say words about the pollution one by one.land pollution：…air pollution：…noise pollution：…water pollution：…②Get the students to write down these words in their notebooks.③Play the recording for the first time.Students listen and circle the kinds of pollution.Check answers with the class.④Read the sentences in 2b.Predict the contents they will fill in.Play the recording.Students listen and complete the sentences.⑤Play the recording again.Check the answers with the whole class.5．Finish the task in 2c①Read the sample conversation in 2c.Then Read the listening materials and discuss in pairs what causes the two kinds of pollution.②Students work in pairs，making dialogues.③Ask three pairs to role－play their conversations to the class.6．Finish the task in 2d①Talk about the picture in 2d.Ask：What are your ideas for solving the air pollution/waste pollution problem？Present the new words in the conversation.Such as，coal，advantage，wooden，plastic，takeaway，bin，…②Read the conversation in 2d quickly.Find out the problems about environmental pollution in the dialogue.③Read the conversation again.Ask the students to find the ways to solve the problems of air and waste pollution.④Read aloud the conversation by the recording.⑤Learn the useful expressions：What are your ideas for doing…To cut down air pollution，we should…So together，our actions can make a difference and…⑥Role－play or read the conversation in pairs until fluently.★Step 3Homework1．What are your ideas for solving the waste pollution problem?2．Write the words about the four kinds of pollution.3．Translate the following sentences into English.(1)我们正在想办法拯救地球。
Unit 13 We are trying to save the earth.1.重点词汇：bottom, fisherman, coal, advantage, industry, law, gate, bottle, president, work, metal...2. 短语归纳：1. be full of 充满2. get in the shower 在洗淋浴3. leave sth in sp 把某物留在某地4. by the time... 到……的时候；到……之前5. be late for class 上课迟到6. go off 发出响声7. brush one’s teeth 刷牙8. give sb a lift 捎某人一程9. be about to 即将……；正要……10. stare at 盯着看11. in disbelief 疑惑地；不相信地12. take off （飞机等）起飞13. show up 赶到14. get a chance to do sth 得到一个做某事的机会15. leave for sth 动身去某地16. sell out 卖光17. lose weight 减肥18. run out of 用完3. 必背典句：1. We are trying to save the earth. 我们正在努力拯救地球。
2. The river used to be clean. 这条河过去是干净的。
3. The air is badly polluted. 空气受到严重污染。
4. No scientific studies have shown that shark fins are good for health.没有科学研究表明鱼翅对健康有益。
4.语法知识：英语句子成分分析组成句子的各个部分叫做句子成分。
它包括：主语、谓语、宾语、定语、状语、表语和宾语补足语等。
Unit 13 We’re trying to save the earth!知识导航语言目标谈论污染和环境保护。
Section A 重点单词1. litter v.乱扔n.垃圾2. bottom n.底部3. coal n.煤4.ugly adj.丑陋的 5. cost v.花费n.花费 6. wooden adj.木制的 (wood n.木材) 7. plastic adj.塑料的n.塑料 8. method n.方法 9. cruel adj.残酷的 10. harmful adj.有害的 (harm n.害处) 11. industry n.工业 12. law n.法律 13. afford v.承担得起重点短语1.make a difference 起作用；有影响2. take part in 参加3. turnoff 关掉4. pay for 付费；付出代价5. cut down 减少6. lead to 导致7.hear of 听说 8. cut off 切除重点句型1.We’re trying to save the earth. 我们在努力拯救地球。
2. The rive used to be so clean. 这河流过去是如此的清澈。
3. The air is badly polluted. 空气被严重污染。
4. The method is not only cruel, but also harmful to theenvironment. 这种方法不仅残酷，而且对环境也有害。
Section B +Self Check 重点单词1. recycle v.回收利用2. gate n.大门3. bottle n.瓶子4.president n. 负责人 5. work n.作品 6. metal n.金属重点短语1. throw away 扔掉2. put sth. to good use 好好利用3. put …down 拆下 4. upside down 上下颠倒 5. bring back 恢复重点句型1. And the gate in front of her house is made of rocks and oldglass bottles. 她房子的前门是由岩石和旧玻璃瓶子制成的。
Unit 13We're trying to save the earth!Ⅰ.单项选择(共15小题；每小题3分，满分45分)()1.Ben is a foreign teacher. So far, he ________ in Beijing for five years.A．was teachingB．has taughtC．will teach()2.Books are made ________ paper while paper is mainly made ________ wood.A．of; of B．from; ofC．of; from()3.—The house price has been rising in the past two years.—Yes, I cannot ________ to buy a small apartment even with my parents' help.A．want B．affordC．solve()4.—Do you know the girl ________ is helping the old man.—Oh, that's my sister.A．whom B．whoseC．who()5.—What were you doing at 10 o'clock yesterday?—I ________ on the grass and drawing a picture.A．was sitting B．satC．am sitting()6.If I have enough money, I ________ a school bus to help the poor children go to school.A．buy B．boughtC．will buy()7.I love the school ________ I have studied for six years.A．where B．whenC．that()8.It's getting dark. Please ________ the light.A．turn on B．turn offC．turn down()9.Farmers have become ________ in our hometown in recent years.A．more and more richB．richer and richerC．more rich and more rich()10.I bought a new sweater last weekend. It ________ me 120 yuan.A．paid B．take C．cost()11.That man ________ be my English teacher. He has gone to Canada.A．needn't B．mustn'tC．can't D．shouldn't()12.After washing your hands, please ________ the tap.A．turn up B．turn downC．turn off()13.________ rubbish into the river is harmful ________ the fish in it.A．Throw; to B．Throwing; withC．Throwing; to()14.The students in this school are made ________ school uniforms on Monday.A．to wear B．wearingC．wear()15.—It's too late. I have to go now.—Oh, it's raining heavily outside. You'd better stay ________ it stops.A．until B．sinceC．whileⅠ.阅读理解(共5小题；每小题4分，满分20分)It is reported that some developed countries have shipped broken parts of computers to China. Last month Hong Kong officers found 131，000 kilograms of broken computers, TVs and phones sent from Japan.Things like these are called electronic waste, or ewaste. Dealing with it is not an easy job. Every time an old computer breaks down, it needs to be dealt with safely. What is worse, at present, broken computer parts are usually buried. It may be hundreds of years before they are really gone in the earth.Many places in China are polluted by ewaste. Guiyu in Guangdong Province is one of them. This town is named as “the ewaste capital of the world”. It has to deal with 1.5 million kilograms of ewaste each year, from which it makes 75 million yuan. But it comes at a cost. Many of the poisons in ewaste find their way into the environment. An environmental group has found the air, the earth and the rivers in Guiyu are badly polluted.Luckily, the Chinese government wants the country to change the situation. China has passed a new environmental protection law, the strictest one we have ever had. Computer companies like Lenovo and Dell are asked to take back their old computers. Hopefully, the problem with ewaste will be solved in the near future.()16.The ewaste found in Hong Kong last month was from ________.A．France B．JapanC．Germany()17.The underlined word “buried” probably means “________” in the passage.A．焚烧B．降解C．回收()18.The town of Guiyu in Guangdong Province ________.A．is the ecapital of the worldB．has serious ewaste pollutionC．deals with ewaste safely()19.Chinese government has________.A．closed some computer companiesB．asked people to hand in their old computersC．made a new environmental protection law()20.The passage is mainly about ________.A．the ewaste problem in ChinaB．the cost of burning ewasteC．the ways to deal with ewasteⅠ.任务型阅读(共5小题；每小题4分，满分20分)阅读短文，捕捉信息，根据短文内容完成文后的句子。
The problems with the environment is becoming more and more serious. You may think it is the government's job to take action and it is difficult for the individual (个人) to protect the environment. In fact,there are several easy things that can be done to make a difference.You can start your action by learning to recycle. Although this appears really simple, there are many people who still throw glass bottles and metal cans (金属罐) into their common rubbish bins. Do you notice that our government has put many special rubbish bins in public places? They all have glass and metal recycling signs. If you spend a few seconds washing the cans and bottles and put them into the rubbish bin, you will be on the path to protect the environment.One more big waste product is newspaper. Most people will take their newspapers and throw them into rubbish bins when they finish reading them. In fact, there are many other things you can do with an old newspaper. For example, newspapers are something useful for cleaning windows. You can clean windows with newspapers rather than paper towels and window cleaners for a perfect shine.What else you can do is walking a bit more. Many people usually get into their cars and drive one block to get cola at the local shop. If you walk to the shop, you can not only spend less time, because you needn't try to find a parking place, but you will save money on oil. If you wish to save even more on oil, take the chance to share the same car with others.21．The environment is getting ________. Though individual power is small, you can do several things ________ to make a difference.22．The government has put many special ________________ with glass and metal recycling signs in public places to get people ________ waste like glass bottles and metal cans.23．The writer thinks ________ are another big waste product and he advises people to use newspaper to ________________________.24．Walking to the local shop instead of driving can not only save your ________ but also your ________.25．In this passage, the three examples tell you that protecting the environment is not as ________ as you imagine and that ___________________________________________________________ _____________is a way to protect the environment.Ⅰ.根据语境或句意，用所给词的适当形式填空(共5小题；每小题3分，满分15分)26．It's very hard ________ down the air pollution. (cut)27. I couldn't afford ________ any longer. (wait)28．We should keep our school clean instead of ________ here and there. (litter)29．He used to be________ “Little Tiger”. (call)30．That player's success is an________ to us all. (inspire)Ⅰ.1.B 2.C 3.B4．C先行词是the girl，指人，在定语从句中作主语，关系代词用who。
