课件40张PPT。Section A (1a-2d)Unit 13 We're trying to save the earth!学习目标 Key words & phrases:
litter, bottom, fisherman, coal, ugly, advantage, cost, wooden, plastic, make a difference
Key sentences:
1. The river was dirty. Even the bottom of the river
was full of rubbish.
2. But it used to be so clean!
3. Yes, but people are throwing litter into the river.Read and learnWords and expressionsLead inThe earth is polluted.air pollutionThe factories that burn coal pollute the air with a lot of black smoke. water pollutionFactories put waste into the river.litter v. 乱扔
n. 垃圾
rubbish waste
垃圾 废弃物mobile phone pollutionnoise pollutionThere are more
cars on the road.Presentation1aHere 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 phonesnoise pollution
____________
____________
____________
____________air pollution
___________
___________
___________
___________water pollution
____________
____________
____________
____________loud musicplanesmobile phonesfactoriescarssmokingshipsfactorieslitteringrubbishbuilding housesbuilding houses1bListen and complete the sentences.really dirtyrubbishfishlitterwastegovernmentclose downclean up1cThe river was dirty. Even the bottom of the river was full of rubbish.But it used to be so clean!Role-play the conversation. Yes, but people are throwing litter into the river.Everyone in this town should play a part in cleaning it up!PracticeMake conversations using the pollution in 1a.......Language points1. We’re trying to save the earth!
我们正在竭尽全力拯救地球!
try to do sth.=try one’s best to do sth.
努力去做某事。
e.g. Every student should try to study
hard in order to study in a good
university.
为了进入一所好大学学习，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。 2aListen to the interview. Circle the kinds of pollution that Jason and Susan talk about. land pollution B. air pollution
C. noise pollution D. water pollution2bListen 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.more carspollute3. 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 (丑陋的) ones. are throwing awaypublic placesUse the information in 2a and 2b to role-play conversations between Jason and Susan.2cThe air has become really polluted around here. I’m getting very worried.Yes, I used to be able to see stars in the sky.The problem is that… What should we do to save the earth?Discussion1. Turn off the lights when you leave a room.关掉2. stop riding in cars3. stop using paper towels or napkins（餐巾，餐巾纸）4. recycle books and paper回收利用5. ...2dRead 2d and complete the chart.take the bus, subway or ride a bike instead of drivingbring a bag to go shopping, never
take wooden chopsticks or plastic forks but use the ones at home while buying takeway food
throw rubbish in the binsRole-play Jason and Susan, what are your ideas for solving these problems?Language pointsThis is turning beautiful places into ugly ones.
turn… into… 把……变成……e.g. The icy rain seemed like to turn into snow.
冻雨似乎又变成雪花的模样。 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.cost??spent?takes4. You should __________? some time practicing your pronunciation.
5. My brother _______?6, 000 yuan for the new computer yesterday.spendpaid3. So together, our actions can make a difference and lead to a better future!
make a difference (to…)
(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。用动词的适当形式填空。
1. We’re trying _______ (save) the earth.
2. There are too many ____ for __________
to catch (fish).
3. It’s bad for the environment to use
_________ (wood) chopsticks.to savefishwoodenfishermen口头作业 (Oral work)
熟读课文Unit 13 Section A (2d)
书面作业 (Writing work)
学练优 Unit 13 Section A
第一课时Homework课件44张PPT。Section A (3a-4c)Unit 13 We're trying to save the earth!学习目标 Key words & phrases:
cruel, harmful, be harmful to, industry, law, scientific,
take part in, afford, turn off, reusable, pay for, take action
Key sentences:
1. We're trying to save the earth.
2. The river used to be so clean.
3. No scientific studies have shown that shark fins are
good for health. Lead inThere are some animals are endangered. We should do something to protect the animals and the environment! Save the earth! Save the animals.The zoos provide homes for many
endangered animals. 1. Have you ever seen
a shark（鲨鱼）?
2. What do you know
about sharks?Discuss with your partner:Presentationsouthern China70 milliondevelop laws to stop the sale of shark finsWildAid and the WWF3aRead the passage about sharks and complete the fact sheet below.3bRead the passage again and fill in the blanks with the words in the box.so although if but when 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.whenso3. 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 people
believe 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.butAlthoughifadj. 科学上的，科学的Retell the passage according to the words below.shark 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 Language points1. A shark can no longer swim and slowly
dies. 鲨鱼不能再游泳然后慢慢死掉。no longer意思是“不再”
e.g. I’m no longer a student.
我不再是个学生了。 有两个短语和no longer同义，即not…any longer和not…any more，但它们侧重的方面不同。no longer和not…any longer侧重时间。
e.g. He no longer lives here.
= He doesn’t live here any longer.
他不在这儿居住了。(一个时间以前他住
在这儿，过了这个时间，他就离开了。)
not…any more侧重程度和数量
e.g. You can drink no more.
= You can’t drink any more.
你不能再喝了。(喝酒的量到了一定程
度，不能再继续下去了。) 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。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。e.g. She not only plays well, but also writes music.
她不但很会演奏，而且还会作曲。
Not only men but also women were chosen.
不仅仅是男的，女的也有被选中的。 若连接两个成分作主语，其谓语通常与靠近的主语保持一致。
e.g. Not only you but also he has to leave.
不只是你，他也得离开。 not only放在句首，后接句子时要用倒装结构。
e.g. Not only had the poor man been fined, but
also he had been sent to prison.这个可怜的人不仅被罚款，而且还被送进了监狱。 be harmful to 对……有害
e.g. Smoking is harmful to health.
吸烟有害健康。
Playing computer games toomuch 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. I looked at the top of his head, his hair
shiny and parted smoothly.
我看他的头顶, 头发闪亮且平滑地分开。
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numbers表达全海洋中鲨鱼的总量。当表示数值的高或低时，number要用high或low修饰。e.g. In that country, the number of children going to school is higher in cities than that in towns and villages.
在那个国家，城市儿童入学人数比乡镇及农村要高。
常与number搭配的动词有grow, fall等。
e.g. The number of families that own cars has been growing quickly recently. 近来拥有轿车的家庭数量增长很快。5. Environmental protection groups around
the world, such as WildAid and the WWF,
are teaching the public about “finning”.
世界各地的环境保护组织，如野生救援协
会和世界自然基金会，都在教育公众有关
“猎翅”的行为。
1) 句中fin本为名词，指 “鱼鳍”。此句中的
finning由动词化的fin（割鲨鱼鳍以获取
鱼翅）的-ing形式转化而成，指课文中所
陈述的 “猎翅”这一行为。 2) WildAid和WWF组织
WildAid（美国野生救援协会）是保护野生动物及栖息地环境的一个非盈利性的机构，1999年注册成立，其宗旨是保护及救助世界范围内的野生动物；WWF（世界自然基金会）英文全称为World Wide Fund for Nature，成立于1961年，是享有国际盛誉，全球最大的独立性非政府环境保护组织之一。Grammar Focus现在进行时: Present Progressive结构: be (am/is/are) + v.-ing
标志词：look, listen, now, right now…
e.g. Look! The boy is crying.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正在进行的动作。 What a fine day today!
Look! What are they doing?Exerciseused 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.used to do与be used to doingTranslation.
1. 她过去常常周末和朋友闲逛。
She used to hang out with friends on weekends.
2. 他习惯于每天晚上熬夜。
He is used to staying up every night.Exercise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.Translate the sentences by using Passive voice.
1. 刚才一些老年人参观了博物馆。
2. 工人们使用不同种类的机器工作。The museum was visited by some old people just now. Different kinds of machines are used to work by the workers. Exercise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.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。 现在完成时: Present PerfectComplete the following sentences.
I _________ (be) in Beijing for two years.
2. I _____ never _____ (hear) of that
man before.
3. Tom __________ (work) there since
two years ago.have beenhaveheard has workedExercise4. The twins ___________ (wash) the clothes for an hour.
5. He _________ (play) basketball since three years ago.
6. How long ____ Sally _____ (sing) yet?have washedhas playedhassung1. 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。情态动词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.Translation.
1. 我们不能在教室里吃东西。
2. 首先你必须完成作业。
3. 他现在不可能在家。
4. 她一定知道这个问题的答案。ExerciseWe can’t eat in the classroom.? You must finish your homework first. He can’t be at home now.? She must know the answer to this question.4aFill 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).Have takenhelpedconsideredhadhad参加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!tookthinkcametryingwaitv. 承担得起(后果); 买得起4bFill in the blanks with the appropriate
modal verbs from the box.People __________ think that big things
______ be done to save the earth. Many
forget that saving the earth begins with
small things. For example, you ____ savemay/mightmustcancan would could have to should must may/ mightelectricity by turning off the lights when
you leave a room. You ______ also use
reusable bags instead of plastic bags. I think it’s a great idea that you now ______ pay for 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 couldhave to can/shouldcan/could关掉adj.可重复使用的付费;付出代价small things ______ add up and become big things that _________ improve the environment. Let’s
take action now!couldwould/can采取行动4cMake a list of things that people can do to help the environment and discuss your list with your partner.use public transportation (n.交通运输); …I think that everyone should use public transportation.I disagree. It’s difficult for parents with young children to use public transportation…口头作业 (Oral work)
熟读课文Unit 13 Section A （3a）
书面作业 (Writing work)
学练优 Unit 13 Section A
第二课时HomeworkThank you for your attention!
