Unit 13 We’re trying to save the earth! Section A 1a-4c（104张PPT）

课件104张PPT。Unit 13
We're trying to save the earth!Section AThe earth is polluted.Lead-inlitter v. 乱扔
n. 垃圾
rubbish waste
垃圾，废弃物People should throw away litter in the bin.n. 垃圾箱noise pollutionThere are more
cars on the road.litter v. 乱扔
n.垃圾；废弃物bottom n.
底部；最下部fisherman n.
钓鱼的人1aHere 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
____________
____________
____________
____________loud musicplanesmobile phonesfactoriescarssmokingshipsfactorieslitteringrubbishbuilding housesbuilding housesloud music cars rubbish planes
littering ships factories smoking
building houses mobile phones1bListen and complete the sentences.really dirtyrubbishfishlitterwastegovernmentclose downclean up1cRole-play the conversationThe river was dirty. Even the bottom of the river was full of rubbish.But it used to be so clean!Yes, but people are throwing litter into the river.Everyone in this town should play a part in cleaning it up!littering 乱丢废弃物
litter 作不可数名词，意为“垃圾；废弃物”。
如：There were piles of litter on the streets.
街上有一堆一堆的废弃物。
There will be fines for people who drop litter .
乱扔垃圾的人将被罚款。Language pointslitter 作及物动词，意为“把...弄得乱七八糟”。
如：Don't litter up the floor with scraps of paper.
别往地上乱丢纸屑。
It is antisocial to leave one's litter in public place.
在公共场所遗弃杂物是妨害公共利益的。Language pointslitter 还可作不及物动词，意为“ 乱扔废弃物”。
如：Please don't litter. 请勿乱扔纸屑杂物。
Why do you always litter up the table with all these newspapers?
你为什么总是将报纸乱丢，把桌子弄得乱糟糟呢？Language points1. 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。Language points2. 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。 1. The street _____ ______ _____ (充满了)
rubbish.
2. __________ (litter) causes pollution.
3. Factories are putting ____________ (pollute) water into the river.is full ofLitteringpolluted4. The city _________ _______ (过去) be
so clean.
5. We should play a part in _________
(clean) the city up.
6. There _______ _____ _____ (过去有) so
many trees on the hills.used to cleaningused to be7. 根据汉语意思完成句子。
不要将房间弄得乱糟糟的。
_______ _______ ______ the room.
8. She painted herself thick and ______.
A. ugly B. uglify
C. uglily D. uglinessDon't litter upAcoal n.
煤；煤块ugly adj.
丑陋的；难看的wooden adj.
木制的；木头的plastic adj.塑料的
n.塑料；塑胶takeaway n.
外卖食物bin n.
垃圾箱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) ones. are throwing awaypublic placesThe 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…Use the information in 2a and 2b to
role-play conversations between Jason
and Susan.factories that burn coal pollute the
air with a lot of black smoke.Role-play People are throwing away things like wooden chopsticks,plastic bowls and bags.There are also more cars on road and there is too much rubbish and waste in the streets these
days.They're also littering in public places.This is turning beautiful places into ugly ones.Jason and Susan, what
are your ideas for solving
these problems? Well, to cut down air
pollution, we should
take the bus or subway
instead of driving. Role-play the conversation. Yeah, or ride a bike. There
are other advantages of bike
riding. It’s good for health
and it doesn’t cost anything!Great ideas! What
about waste pollution?Mmm, I think simple
things like bringing
a bag to go shopping
can help. I started
doing that a year ago. Me, too. Also, I never
take wooden chopsticks
or plastic forks when
I buy takeaway food.
I use the ones at home. And remember to throw
rubbish in the bins and
keep public places clean
and beautiful for everyone.So together, our
actions can make
a difference and
lead to a better future!2dRead 2d and complete the chart.take the bus, subway or ride a bike instead of driving. bring a bag to go shopping.use chopsticks or forks at home.throw rubbish in the bins.1. People are also littering in _______ like parks. This is turning beautiful places into ugly ones.
ugly 作形容词，意为“难看的；丑陋的”，指人、动物或事物的外貌或道德上令人反感。还可表示“有敌意的；阴险的；不祥的”，在句中可作表语或定语，反义词为comely,beautiful。
如：The fairy changed the ugly old woman into a frog.
仙女把那个丑陋的老女人变成了一只青蛙。Language points2. There are other advantages of bike riding.
advantage作名词，意为“有利条件,优点,优势”，
反义词为disadvantage。
如：He had the advantage of a good education.
他具备受过良好教育的优势。
What is the advantage of using nuclear power?
使用核能有何好处?Language pointsadvantage还可作及物动词，意为“有利于；使处于优势”。
如：It would advantage him to go abroad.
出国会对他有好处。
It would advantage you to work hard.
努力工作对你会有益。Language points3. It’s good for health and it doesn’t cost anything!
be good for意为“有益于；适于”，后接名词或动词-ing形式。
如：Whisky can be good for you if taken in moderation.
威士忌酒如饮用适度是有益的。

Do it up. It'll be good for you.
把它喝完，它对你有益。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.
渐渐地冻雨又变成雪花的模样。 Language points2. 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 practising 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…)
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。1.(2013·山东青岛) ---How much is the ticket to
Central Park?
---A one-way ticket _____ $40, and you can
____ anther $20 for a round-trip.
A. costs, pay B. cost, spend
C. pay, spend D. spends, pay
2. The poor old man lived in a little ____ hut.
A. wood B. woodenly
C. woodenness D. woodenAD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.to savebefishwoodenfishermenTranslate these sentences into English.1. 甚至是河底都满是垃圾。
2. 这个镇上的每个人都应该参与清扫。Even the bottom of the river was full of rubbish.Everyone in this town should play a part in cleaning it up. 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。There are other advantages of bike riding.I never take wooden chopsticks or plastic
forks when I buy takeaway food. The earth is badly polluted.
What should we do to save the earth?Warming upLet’s take action (采取行动)Turn off the lights
when you leave a room.Recycle books and paper. Take buses instead of driving cars.shark n.鲨鱼fin n.
（鱼）鳍cruel adj.
残酷的；残忍的harmful
adj.有害的1. Have you ever seen
a shark（鲨鱼）?
2. What do you know
about sharks?Discuss with your partner:Read the passage about sharks and
complete the fact sheet below.southern China70 milliondevelop laws to
stop the sale of
shark fins.WildAid 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，但他们侧重的方面不同。Language pointsno 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 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. I looked at the top of his head, his hair
shiny and parted smoothly.
我看他的头顶, 头发闪亮且平滑的分
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 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。
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. Environment 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。Revision 不同种类的污染
2. 河底
3. 把垃圾扔到河里
4. 在……中起作用different kinds of pollutionthe bottle of the riverthrow rubbish into the riverplay a part in I. Check if you know these phrases.5. 在中国南部
6. 对……有害
7. 在……顶部
8. 海洋生态系统in southern Chinabe harmful to at the top ofthe ocean’s ecosystemII. Translate the sentences.1. 甚至是河底都满是垃圾。
2. 这个方法不仅残酷还对环境有害。Even the bottom of the river was full of rubbish.This method is not only cruel, but also harmful to the environment.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。Sharks are at the top of the food chain in the ocean’s ecosystem.A lot of people believe that shark’s fins are good for health.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. 他习惯于每天晚上睡得很晚。
He is used to staying up.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I think that everyone
should use public
transportation.I disagree. It’s
difficult for
parents with
young children
to use public
transportation…Make a list of things that people
can do to help the environment and
discuss your list with your partneruse 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(餐巾纸);
recycle books and paper
save water clean up the hometown/city
Don't throw rubbish away.
Don't put the waste into the river
Don't play fire in the forest.
Don't speak loudly in public......1. We can’t afford to wait any longer to take action!
afford v. 承担得起; 提供, 给予
afford to do sth. (常与can, be able to连用) 买得起; 有足够的……
e.g. We can’t afford to pay such a price.
我们付不起这个价钱。
Dancing affords us pleasure.
跳舞给我们带来快乐。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。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 移交拓展: turn相关短语