Unit 13 Were trying to save the earth 教学案例.docx
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Unit13Weretryingtosavetheearth教学案例
Unit13We’retryingtosavetheearth!
教学案例
语言目标； industry, law, scientific, afford, reusable, transportation, recycle, napkin, upside, gate, bottle, president, inspiration, iron, work, metal, creativity,
基本词组：
be harmful to, at the top（of sth.）, take part in, turn off, take action, throw away, put sth. to good use, pull… down, bring back
基本句型：
We’re trying to save the earth!
The river used to be so clean.
The air is badly polluted.
No scientific studies have showed that shark fins are good for health.
We should help save the sharks.
2. 技能目标:
能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。
3. 情感目标:
有环境危机意识，学会关注环境保护环境。
二、教学重难点：
1. 教学重点：
（1）能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。
（2）保护环境的措施方法。
2. 教学难点：
能正确运用现在进行时，现在完成时，被动语态，情态动词和used to 句型。
三、教学步骤:
Section A 1 （1a-2d）
I. Presentation
Show the picture of the earth and tell students the earth is polluted now.
For example:
（1） The factories that burn coal pollute the air with a lot of black smoke.
（2） Factories put waste into the river.
（3） People should throw away litter in the bin.
（4）There are more cars on the road.
II. Learning
Here are some words related to different kinds of pollution. Write them in the box below. Then add more words.
loud music cars rubbish planes littering ships factories smoking building houses mobile phones
noise pollution air pollution water pollution
____________ ___________ _____________
____________ ___________ _____________
____________ ___________ _____________
____________ ___________ _____________
Keys :
noise pollution loud music planes mobile phones building houses
air pollution factories smoking cars building houses
water pollution ships rubbish littering factories
III. Listening
1. 1b Listen and complete the sentences.
What was the problem?
The river was _____________. Even the bottom （底部） of the river was full of ________. There were no more ______ for fishermen （渔民） to catch.
What caused the problem?
People are throwing _______ into the river. Factories are putting ______ into the river.
How should the problem be solved?
We should write to the ____________ and ask them to ___________ the factories. Everyone should help to __________ the river.
Keys:
really dirty rubbish fish litter waste government
close down clean up
2. Listen again and check （√） the sentences you hear.
1） We could go fishing in the river.
2） The river was really dirty.
3） The river has always been the nicest river in this town.
4） We should ask the teachers for help.
Keys:
2 3
IV. Practice
1. Role-play the conversation in 1c.
Mark:
The river was dirty. Even the bottom of the river was full of rubbish.
Tony:
But it used to be so clean!
Mark:
Yes, but people are throwing litter into the river.
Tony:
Everyone in this town should play a part in cleaning it up!
2. Make conversations using the pollution in 1a.
A:
The river has always been the nicest river in this town.
B:
Yes, it used to be so clean.
A:
But I was there last weekend and the river was really dirty.
B:
What caused the problem?
A:
People are throwing litter into the river.
B:
What should we do?
A:
Factories are also putting waste into the river.
B:
Yes, everyone in this town should play a part.
A:
We should write to the government and ask them to close down the factories.
B:
What else can we do?
A:
Everyone should help to clean up the river.
V. Language points
1. We’re trying to save the earth!
我们正在竭尽全力拯救地球!
try to do =try one’s best to do 努力去做某事。
e.g. Every student should try to study hard in order to study in a university.
为了进入大学学习，每个学生都应该努力学习。
2. Here are some words related to different kinds of pollution.
be related to 与…有关
e.g. I am not related to him in any way. 我和他无任何关系。
3. Everyone in this town should play a part in cleaning it up!
play a part in 在……方面起作用
e.g. A good diet plays a large part in helping people live longer.
健康的饮食在帮助人们长寿方面起着非常大的作用。
play a part 在……中扮演角色
e.g. He was invited to play a part in this TV play.
他被邀请参加这个电视剧的演出。
4. Even the bottom of the river was full of rubbish.
Yes, but people are throwing litter into the river.
litter 和 rubbish 都可指“垃圾”，用作不可数名词。
rubbish 指“没用的东西（被扔或将要丢弃的无用的东西）”不可回收。
litter 指“（室内或公共场所）乱扔的废物（纸屑、不要的包装纸、废瓶等）”还可回收
e.g. Throw the rubbish out. 把垃圾扔出去。
The room is full of rubbish. 房间里堆满了垃圾。
Pick up your litter after a picnic. 野餐后将废弃物收拾好。
VI. Listening
1. 2a Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about.
A. land pollution B. air pollution
C. noise pollution D. water pollution
Keys:
B A
2. 2b Listen again and complete the sentences.
1） The air is badly polluted because there are ___________ on the road these days.
2） Factories that burn coal also ________ the air with a lot of black smoke.
3） There is also too much rubbish and waste. People _________________ things every day.
4） People are also littering in ______________ like parks. This is turning beautiful places into ugly （丑陋） ones.
Keys:
more cars pollute are throwing away public places
3. Listen and answer the questions.
1） Who is the interviewer talking to?
2） What are they talking?
3） What other problems do they see?
Keys:
Susan and Jason.
The environmental problems.
There’s too much rubbish and waste in the streets.
VII. Practice （2c）
Use the information in 2a and 2b to role-play conversations between Jason and Susan.
Jason:
The air has become really polluted around here. I’m getting very worried.
Susan:
Yes, I used to be able to see stars in the sky.
Jason:
The problem is that…
VIII. Discussion
Ask students what we should do to save the earth. Help students answer, turn off the
lights when you leave a room; stop riding in cars; stop using paper towels or napkins; recycle books and paper.
IX. Reading
1. Read 2d and complete the chart.
ProblemsSolving problems
air pollution
waste pollution
wooden （木头的） chopsticks or plastic forks
rubbish
2. Role-play the conversation.
Interviewer:
Jason and Susan, what are your ideas for solving these problems?
Jason:
Well, to cut down air pollution, we should take the bus or subway instead of driving.
Susan:
Yeah, or ride a bike. There are other advantages （优点） of bike riding. It’s good for health and it doesn’t cost （花费） anything!
Interviewer:
Great ideas!
What about waste pollution?
Susan:
Mmm, I think simple things like bringing a bag to go shopping can help. I started doing that a year ago.
Jason:
Me, too. Also, I never take wooden chopsticks or plastic （塑料） forks when I buy takeaway （外卖食品） food. I use the ones at home.
Susan:
And remember to throw rubbish in the bins and keep public places clean and beautiful for everyone.
Interviewer:
So together, our actions can make a difference and lead to a better future!
X. Summary and language points
1. This is turning beautiful places into ugly ones.
turn… into… 把……变成……
e.g. The icy rain seemed like to turn into snow.
渐渐地冻雨又变成雪花的模样。
2. It’s good for health and it doesn’t cost anything!
cost v. 花费；使付出
指花费金钱，主语通常是物。
cost的过去式和过去分词均为cost。
e.g. The new shirt cost Mr Wang 200 yuan. 王先生花了200元买了新衬衫。
How much does the new computer cost?
新电脑花了多少钱？
take, spend, pay & cost
take，spend，pay和cost都可以表示“花费”，但它们的用法各有不同。
1） take多表示花费时间，常用于It takes sb. some time to do sth.这一句型中，其中it作形式主语。
e.g. It usually takes me 40 minutes to cook the dinner.
2） spend多表示花费时间和金钱，主语通常是人，常用于sb. spend（s） some time / money on sth.和sb. spend（s） some time / money （in） doing sth.两种句型。
e.g. David spent 2,000 yuan on the new machine.
My father spends an hour （in） watching the news on TV every day.
3） pay多表示花费金钱，主语通常是人，常用于sb. pay（s） some money for sth.句型。
e.g. Tommy paid 20 yuan for his breakfast yesterday.
4） cost多表示花费金钱，主语通常是物，常用于sth. cost（s） （sb.） some money. 句型。
e.g. The new dress cost Linda 88 yuan.
根据句意用take, spend, pay或cost的适当形式填空。
1） That new car ________ them lots of money.
2） Mona __________ 50 yuan on the books just now.
3） It usually _______ me an hour to do my homework.
4） You should __________ some time practising your pronunciation.
5） My brother _______ 6, 000 yuan for the new computer yesterday.
Keys cost spent takes spend paid
3. So together, our actions can make a difference and lead to a better future!
make a difference （to…） 表示（对……）产生影响或作用
e.g. Do you think his words would make any difference to the final decision?
你认为他的话会对最后的决定产生影响吗？
The new teacher always encourages little Tom. This has made a big difference
to him.
新来的老师总是鼓励小汤姆，这对他影响很大。
XI. Exercises
用动词的适当形式填空。
1） We’re trying _______ （save） the earth.
2） There used to_____ （be） clean and beautiful.
3） There are too many ______ for ________to catch （fish）.
4） It’s bad for environment to use _________ （wood） chopsticks.
Keys:
to save be fish fishermen wooden
XII. Think about
The earth is badly polluted. Please make a poster and think of what we can do.
XIII. Homework
1. Copy the new words and remember them.
2. Read the listening materials of 1b, 2a.
Section A 2 （3a-3c）
I. Revision
（1）Role-play 2d.
（2）Translate these sentences into English.
①甚至是河底都满是垃圾。
②这个小镇上的每个人都应该参加打扫。
③骑自行车有其它的优点。
④我买外卖食品从来不拿木筷子和塑料叉子。
II. Lead in
（1） Teacher tells students the earth is badly polluted. What should we do to save the earth?
Let’s take action. For example:
①Turn off the lights when you leave a room;
②Take buses instead of driving cars
③Recycle books and paper.
（2） There are some animals are endangered. We should do something to protect the animals and the environment!
III. Discussion
（1） Have you ever seen a shark?
（2） What do you know about sharks?
IV. Reading
（1）Sharks are endangered, read the passag
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