【英语教案】Unit13Wearetryingtosavetheearth!教案
Unit 13We’re trying to save the earth!
一、教学目标：
1. 语言知识目标
基本词汇：litter, advantage, bottom, fisherman, coal, ugly, cost, wooden, plastic, takeaway, bin, shark, fin, method, cruel. Harmful, chain, ecosystem,
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)
Learning objectives:
1. To listen for specific information.
2. To talk about pollution and environmental protection.
3. To learn to use the sentence patterns.
used to...but nowshould do sth.
I. Presentation
Show the picture of the earth and tell students the earth is polluted now. Forexample: (1) The factories that burn coal pollute the air with a lot ofblack 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.
Learn some new words.
II. Work on 1a
Here are some words related to different kinds of pollution. Write them in the box below. Then add more words.
noise pollution air pollution water pollution
____________ ___________ _____________
____________ ___________ _____________
____________ ___________ _____________
____________ ___________ _____________
III. Listening
1. Work on1b. Listen and complete the sentences.
2. Listen again and answer the following questions.
1)What does Tony want to do later this afternoon?
He wants to go swimming with Mark in the river later this afternoon.
2) Why doesn’t Mark want to go with Tony?
Because the river was really dirty. Even the bottom of the river was full of rubbish, and there were no more fish for fishermen to catch.
3) How was the river in the past?
It used to be so clean. It has been the nicest river in this town.
3. 原文
used to do sth. “过去常常……” 表示过去习惯性的动作但如今已不存在。
play a part in doing sth. “参与做某事; 在做某事上起作用”。
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 尽力去做某事
【运用】
我会尽力做好这项工作。
___________________________________
We’ll try to finish the work in a week.
try短语
try doing sth. 试着做某事
try on 试穿
try out 尝试；试验；试试
用try短语的适当形式填空。
1) I went t o the tailor’s to _________ my new suit.
2) Let’s _________ your method. It seems very good.
3) I think you should _____________ to improve your English.
4) Let me ____________ the story.
让我试着讲一讲这个故事吧。
2. Here are some words related to different kinds of pollution.
be related to 与…有关
e.g.Is the driver relate to the accident?
司机和这起事故有关吗？
VI. Listening
1. Work on 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
2. Work on 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.
Complete the sentences according to the dialogue.
1. I ____ __ __ able to see stars in the sky, but now I can’t see them clearly. used to
be
2. The air ___ _______ really _______ around there.has become…polluted
3. People are also _______ in the public places. littering
4. The factories that burn _____ also ________ the air with a lot of black
smoke.coal…polluted
3. 原文
Pay attention to the sentences.
VII. Practice (Work on 2c)
Use the information in 2a and 2b to role-play conversations between Jason and Susan. Jason: The air has become really pollut ed 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; stopusing paper towels or napkins; recycle books and paper.
IX. Reading
1. Read 2d and complete the chart.
2. Complete the sentences.
What should we do?
1. We should take _______ or _______ instead of driving.
2. We should also _______ ______ _____. It’s good for health!
3. Bring _______ to go shopping.
4. Never take _________________ or __________ when buying takeaway food.
5. ______________ in the bins and keep public places clean and beautiful.
3. 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!
4. Pay attention to the sentences.
https://www.wendangku.net/doc/6e4615272.html,nguage points
1. 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？
辨析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 80yuan.
(1) It takes sb. some time to do sth. (主语为it)
(2) sb. spend(s) time/money on sth. (主语为sb.)
sb. spend(s) time/money (in) doing sth.
(3) sb. pay(s) money for sth. (主语为sb.)
(4) sth. cost(s) sb. money (主语为sth.)
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.
2. 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
make no difference to 对……没有影响
e.g. Learning English well can make a difference to your future.
学好英语会对你的前途有影响。
XI.Summary
Ⅻ. Exercises
Ⅰ. 根据句意及所给首字母提示，补全句中所缺单词。
1. C can be used to produce electricity.
2. The new car c a lot of money, but it was certainly worth it.
3. There is a w bed, a table and two chairs in this small room.
4. It is a very clean city. You will hardly find l when you walk along the street.
5. My uncle is a great f and he caught four fish this morning.
6. Some cups in the shop are nice and expensive and the others are u and cheap.
7. Living in this street has a lot of a . The only drawback (弊端) is noise. Ⅱ. 根据句意，从方框中选择恰当的短语填空，有的需要变换形式。
1. What a mess! You should ____________ your room now.
2. Every farmer knows that weather ____________ farming.
3. As we all know, smoking too much can ____________ cancer and many other illnesses.
4. He said he would ____________ us when he left home but we haven't heard from him so far.
5. The manager asked me to ____________ the report, because he didn't want to speak too long at the meeting.
Ⅲ. 根据汉语意思完成英语句子，每空一词。
1. 牛奶对孩子们的健康有好处。
Milk _________ _________ _________ children's health.
2. 辛迪，请记得帮我寄信。
Cindy, please _________ _________ _________ me send the letter.
3. 刚才乔重重地摔到楼梯下面。
Joe landed heavily _________ _________ _________ _________ the stairs just now.
4. 我们没有茶。你愿意喝点咖啡代替茶吗？
We don't have any tea. Would you like coffee _________ _________ tea?
5. 人们普遍认为，教育会对一个人的生活产生影响。
People generally agree that education can _________ _________ _________
_________ a person's life.
Think about
The earth is badly polluted. Please make a poster and think of what we can do. Homework
1. Write a short passage abouthow to protect our environment.
2. Preview the article on page 99.
Section A 2 (3a-3c)
Learning objectives
1. To have the awareness of protecting the sharks and respecting nature.
2. To understand the passage about the endangered animal – sharks.
3. To learn to use some words and expressions.
I. Revision
Translation.
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. Warming up
1.T: 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 which are endangered. We should do something to
protect the animals and the environment!
III. Discussion
1. What do you know about shark(鲨鱼)?
2. Do you think sharks can be endangered? Why?
3. What do you think might cause a fall in the number of sharks?
IV. Reading
1.Listen and match the main ideas.
?Talk about shark fin soup.
?Sharks are endangered now.
?Call on people against eating shark fins.
2. True or false. (Paragraph 1)
①Shark’s fin（鱼鳍）soup is famous and expensive all around the world.
②You’re killing a whole shark when you enjoy a bowl of shark fin soup.
3. Read Paragraph 2 and fill in the chart.
4. True or false. (Paragraph 3)
1. WildAid and the WWF are environmental protection groupsin China.
2. Two environmental groups call on the government to establish laws to stop the
sale of shark fins.
3. Shark’s fins are good for health.
https://www.wendangku.net/doc/6e4615272.html,plete the fact sheet in 3a.
6. Retell the passage.
shark’s fin soup, in southern China
each time cut off no longer not only…but also…
at the top drop be endangered the strongest around 70 million fallen by over 90 percent WildAid and the WWF develop laws scientific studies
V. Practice (Work on 3b)
1. Read the passage and fill in the blanks with the words in the box.
1)Many people do not realize they are killing a whole shark ______ they enjoy a
bowl of shark fin soup.
2) Sharks are at the top of the food chain, ____ if their numbers drop, the ocean’s
ecosystem will be in danger.
3) Many think that sharks are too strong to be endangered, _____ they are wrong.
4) _________ there are no scientific studies to support this, a lot of peoplebelieve
that shark fins are good for health.
5) Sharks may disappear one day ___ we do not do something to stop the sale of
shark fins.
2. Group Work
What can we do to save the sharks? Work with your partner and make a poster about shark protection.
VI. Language points
1. A shark can no longer swim and slowly dies. 鲨鱼不能再游泳然后慢慢死掉。
no longer 不再= not…any longer/ not… any mor e
no longer通常位于实义动词之前，be动词、助动词或情态动词之后。
not ... any longer/anymore中的any longer/anymore总是放在句末。
no longer与not ... any longer可以互换。
e.g. Mr Brown no longer works here.
= Mr Brown doesn’t work here any longer/ any more.
Joe no longer likes dancing.
_______________________________________
Joe doesn’t like dancing any longer/ any more.
2. This method is not only cruel, but also harmful to the environment.
这种方法不但残忍而且对环境有害。
1）not only…but also…
用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅……而且……”; 其中的also有时可以省略。
Not only does my sister sing well, but she dances well.
我姐姐不但歌唱得好，而且舞也跳得好。
Not only the students but also the teacher is working hard.
不仅学生们在努力，而且那位老师也在努力。
当not only置于句首时，常用_________。倒装语序
not only... but also...连接两个主语时，谓语动词需与_____那个主语在人称和数上保持一致，就近原则。
后面
【运用】
同义句转换，每空一词。
(1)She and I have already been to Beijing.
____ ____ she ____ ____ I have already been to Beijing.Not only… but also
(2)He likes to swim and he wants to teach the kids to swim, too.
Not only ____ __ ____ to swim, ____ he wants to teach the kids to swim.
does he like… but
(3) The twins were late this morning. Sam was late this morning, too.
Not only the twins ____ ____ Sam ____ late this morning. but also…was
____ ____ Sam but also the twins _____ late this morning.Not only…were
2) be harmful to 对……有害
be bad for 对……有害
e.g. Smoking is harmful to the health.
吸烟有害健康。
Playing computer games much is harmful to students.
电脑游戏玩太多对学生有害。
3. Sharks are at the top of the food chain in the ocean’s ecosystem.
鲨鱼位于海洋生物系统食物链的顶部。
at the top of 在...最高地位; 用最高[最大]的(速度, 声音等)
e.g. He shouted at the top of his voice in order that he might be heard.
他尽力大声叫喊, 以便别人能听见。
4. If their numbers drop too low, it will bring danger to all ocean life.
如果它们的数目降至过低，会给所有海洋生物带来危险。
此句复数形式的number表达全海洋中鲨鱼的总量。
In that country, the number of children going to school is higher in cities than in towns and village.
在那个国家，城市儿童入学人数比乡镇及农村要高。
当表示数值的高或低时，number要用__________修饰。常与number搭配的动词有grow, fall等。high或low
e.g. 近来拥有轿车的家庭数量增长很快。
_____________________________________________________________________ The number of families that own cars has been growing quickly recently.
Ⅶ. Summary
1. 把垃圾扔到河里
2. 在…中起作用
3. 在中国南部
4. 对……有害
5. 在……顶部
6. 海洋生态系统
Homework
1. Review the new words and expressions you’ve learned today.
2. Write 5 measures to protect the environment.
Section A 3 (Grammar Focus-4c)
Learning objectives
To review the use of The Present Continuous Tense, passive voice, Present Perfect and Modal Verbs.
I. Revision
1. Check if you know these phrases.
①不同种类的污染②河底
③把垃圾扔到河里④在…中起作用
⑤在中国南部⑥对……有害
⑦在……顶部⑧海洋生态系统
2. Translation.①甚至河底都满是垃圾。
②这个方法不仅残酷还对环境有害。
③鲨鱼处于海洋食物链的顶部。
④许多人相信鱼翅对健康有好处。
II. Grammar Focus
Pay attention to the sentences.
1) We’re trying to save the earth.
2) The river used to be so clean.
3) The air is badly polluted.
4) No scientific studies have shown that shark fins are good for health.
5) We should help save the sharks.
1. They are playing basketball.
Nancy is working on a new book about stories in schools.
Why are you always coming late for class?
现在进行时: Present Progressive
定义：表示说话时（瞬间）正在进行的动作，也表示目前或现阶段一直进行的动作。
结构: be (am/is/ are) + v.-ing
标志词：Look, Listen, now, right now…
e.g. Look! The boy is crying.
2. used to do与be used to doing
used to do sth. 表示过去常常做某事, 而现在往往不做了, 后接动词原形。
be used to doing sth. 表示习惯于做某事。
e.g. I used to get up at six o’clock.
Joe is used to drinking a cup of coffee every morning.
3. My grandfather built this house in 1930.
This house was built (by my grandfather) in 1930.
主动语态表示主语是动作的执行者,
被动语态表示主语是动作的承受者。
被动语态：Passive voice
定义：表示主语是动作的承受者，即行为动作的对象的一种语态。
结构：be + 过去分词
e.g. A new school was built last year.
Our classroom is cleaned every day.
①一般现在时的被动语态：am/is/are + V-ed
②一般过去时的被动语态：was/were+ V-ed
③一般将来时的被动语态：will/shall+be+ V-ed
不可以变成被动语态的情况
1. 某些感官动词加形容词及少数其他的动词与一些副词连用表示被动意义。smell, taste, prove, sell, etc.
1) The dish tastes delicious.
2) The theory proved right at last.
3) The book is so interesting that it sells well.
4) The pen writes well.
2. need做实意动词时，need + V- ing
主动形式表示被动意义。
我的车需要修理。
My car needs repairing. (= to be repaired).
3. 通常只有及物动词（组）才有被动语态，不及物动词没有。
战争爆发了。
The war broke out.
但不能说：The war was broken out.
4. Lily, clean your teeth please.
Mum, I have already cleaned them.
现在完成时表示动作发生在过去，并对现在有影响。
现在完成时: Present Perfect
定义：表示动作已经完成, 但对现在造成影响; 或者表示从过去某一时间开始一直延续到现在并还可能持续下去的动作。
结构: has/have + 过去分词
标志词：already, yet, ever, never, since, for…
e.g. I haven’t finished my homework yet.
5. 情态动词
1)情态动词本身有一定的词义，表示说话人的情绪、态度或语气，但不能单
独作谓语，只能与其他动词构成谓语。常见的有：can (could), may (might), must, need, shall (should), will (would)等。
2)情态动词无人称和数的变化, 后接动词原形。否定式是在情态动词后面加
not。个别情态动词有过去式形式, 可用来表达更加客气、委婉的语气。
e.g. Ken can climb up the tress like a koala.
Tracy could ride a bicycle when she was five years old.
You mustn’t play with fire. It is dangerous.
中考链接
1. Paul, I’m busy cooking. Can you give me a hand?
— Just a minute. I ______ my e-mail. (2019 河南)
A. am checking
B. will check
C. have checked
D. was checking
2. Don’t take the dictionary away, I _____ it. (2019 河北)
A. use
B. used
C. am using
D. have used
3.The mobile phone ______ in 1973. (2019 北京)
A. invents
B. is invented
C. invented
D. was invented
4. Let’s wait and see whether books _____ by the Internet in the future. (2019 天津)
A. replace
B. replaced
C. will be replaced
D. were replaced
5. —Why are you leaving your job?
—I can’t stand it any longer. I _____ always _____ to work overtime. (2019 河南)
A. am; asking
B. am; asked
C. was; asking
D. was; asked
6. Lily is my classmate. We ______ each other since she came to our school. (2019 北京)
A. know
B. knew
C. have known
D. will know
7. I _____ in the city since I left school. (2019 天津)
A. live
B. will live
C. was living
D. have lived
8. In the past few years, many schools ______ the ways of doing morningexercises. (2019 重庆)
A. change
B. changes
C. will change
D. have changed
9. —_____ I park my car here for a while?
—No, you mustn’t. Do you see the sign “NO PARKING”? (2019 上海)
A. Would
B. May
C. Must
D. Should
10. — May I take the dog with me, sir?
— ______. Pets are not allowed to enter the hall. (2019 重庆)
A. Yes, you may
B. No, you mustn’t
C. Yes, you can
D. No, you needn’t
11. —I don’t care what people think.
—Well, you _____. You’re not alone in this world. (2019 河南)
A. can
B. may
C. should
D. will
12. I have traveled a lot. I _____ speak four languages. (2019 河北)
A. can
B. may
C. must
D. need
ACDCB CDDBB CA
III.Practice
1. Work on 4a. Fill in the blanks with the correct forms of the verbs in brackets. Joe: _____ you ever ______ (take) part in an environmental project?
Eric: Yes, I have. I ______ (help) with a Clean-Up Day last year. It was _________ (consider) the biggest clean-up project this city ____ ever
____ (have).
Joe: How many people ____ (take) part?
Eric: I _______ (think) more than 1,000 people ______ (come) to help out.
Joe: That’s fantastic! I guess everyone in this city is ______ (try) to improve the environment.
Eric: Yes, we can’t afford to ____ (wait) any longer to take action!
Learn some new words and expressions.
2. Work on 4b. Fill in the blanks with the appropriate modal verbs from the box. The words are:
People __________ think that big things______ be done to save the earth. Many forget that saving the earth begins with small things. For example, you ____ saveelectricity by turning off the lights when you leave a room. You ______ also use reusable bags instead of plastic bag s. I think it’s a great idea that you now ______ payfor plastic bags in some stores. And instead of driving to school or work, you__________ ride your bike or walk. If it’s far, you __________ take the bus. All these small things ______ add up and become big things that ______ improve the environment. Let’s take action now!
Learn some new words and expressions.
3. Work on 4c. Make a list of things that people can do to help the environment
anddiscuss your list with your partner.
use public transportation (n.交通运输);
turn off the lights when you leave a room;
use reusable bags instead of plastic bags;
ride your bike or walk to school or work;
stop using paper napkins;
recycle books and paper
4. Discussion.
A: I think that everyone should use public transportation.
B:I disagree. It’s difficult for parents with young children to use
publictransportation…
IV. Language points
1. We can’t afford to wait any longer to take action!
afford v.承担得起;买得起；提供, 给予
常与can, be able to连用
afford sth. 买得起/承受得起某物
afford to do sth. 有能力做某事/负担得起做某事
e.g. Can you afford the mobile phone?
We can’t afford to pay such a price.
【链接】
afford & buy
afford侧重“有经济能力买”，而buy则侧重“购买(这一行为)”。表示“我买不起……”可以说I can’t afford ...，但不能说I can’t buy ...。
【运用】根据句意，用afford或buy的适当形式填空。
(1) T hey can’t ________ to send their children to college.afford
(2) Can you ________ a new car?afford
(3) Helen ________ some fruit on her way home yesterday.buy
2. …save electricity by turning off the lights when you leave a room.
turn off 关掉
e.g. Please turn the television off before you go to bed.
睡觉前请关掉电视。
拓展：turn相关短语
turn around 转身
turn up 调高（音量）
turn down 调低；拒绝
turn into 变成；进入
turn on 打开，发动
turn off 关掉，关闭
turn out to be 结果是
turn over 移交
Ⅴ. Summary
六种时态
Ⅵ.Homework
Finish the exercises in the workbook.
Preview the new words and expressions.
Section B 1 (1a—1e)
Learning objectives
1. To know how to protect our earth.
2. To learn to use some words and expressions.
stop riding in cars
recycle books and paper
turn off the lights
Revision
Fill in the blanks using the correct form of these words.
1. Nick __________(offer) a job in a bank, but to our surprise, he didn’t take it.
2. — Have you heard of the Earth Day?
—Yes. The first Earth Day ____________(celebrate) in 1970 to educate us to protect our planet.
3. — Excuse me, whose book is this?
— It ______(must) be John’s. It has his name on it.
4. Don't make so much noise. The children __________ (have) an English lesson.
5. —Why won’t you go to the movie with me, Gina?
—Because I _________(see) it twice.