Unit13 We're trying to save the earth Section A 1a-3c课件＋音频(共45张PPT)人教版九年级全册

(共45张PPT)
Unit 13
We're trying to save the earth!
Section A
1a-3c
noise pollution
_____________
_____________
____________
___________
loud music
mobile phones
building houses
planes
air pollution
___________
___________
___________
___________
factories
smoking
cars
building houses
water pollution
____________
____________
____________
____________
ships
rubbish
littering
factories
machines,
crowds,
vehicles
burning power
plants,
nuclear waste
disposal
sewage,
industrial waste,
pesticides
1b
Listen 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.
√
√
1b
Listen and complete the sentences.
What was the problem
The river was _____________. Even the
bottom of the river was full of
_________. There were no more ______
for fishermen to catch.
really dirty
rubbish
fish
底部
渔民
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.
litter
close down
clean up
waste
government
垃圾，废弃物
1c
Role-play
The river was dirty…
But it used to be so clean! ...
2a
Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about.
land pollution B. air pollution
C. noise pollution D. water pollution
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.
more cars
pollute
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 ones.
丑陋的
The air has become really polluted…
Yes, I used to be able to see stars in the sky.
The problem is that…
2d
Role-play the conversation.
减少，砍倒
advantage n.优点；有利条件
（反）disadvantage 缺点
2d
Read 2d and complete the chart.
Problems Solving problems
air pollution
waste pollution
Wooden chopsticks or plastic forks
rubbish
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.
木头的
外卖食物
make a difference to对...有作用或影响
n.塑料，adj.塑料的
Jason and Susan, what are your ideas for solving these problems
Role-play
We only have one earth!
Let's play a part in loving and saving it!
Exercises
1.He ___ go out with his parents, but now he ____
staying at home alone.
A. used to; is used to B. is used to; used to
C. used to; used to D. is used to; is used to
2. The interesting book ___ me 10 yuan.
A. took B. paid
C. spend D. cost
What happens to the shark
Without fins, can he swim
Can he die ？
A newspaper
Guess:
where is this article probably from
A novel
A book
how to save the sharks
sharks are endangered now
talk about shark fin soups
para.1
para.2
para3.
Scanning 寻读
Para1.
Talk about shark fin soup.
Read and judge the sentences.
( )①The expensive shark fin soup is popular around the world.
( ) ②You’re killing a whole shark when you enjoy a bowl of shark fin soup.
in southern China.
1800.00 RMB each bowl
F
T
Para. 2 Sharks are endangered now.
why
What happens to the shark
Next , people _______________ their fins .
cut off
Then , people the fins the shark fin soup .
cook
into
If a shark doesn’t have a fin, what will happen (sentence 2.3)
A shark can no longer swim and slowly dies.
不再
fins
swim
ruel
die
Fast reading
Para2. (2.3)
Find out the other adjective to describe the process.
This is not only cruel, but also harmful to the environment.
harmful
A: 残忍的 B:有害的
Scanning 寻读
Para2.
1. Why is it harmful to the environment (4.5)
Sharks are at the top of the food chain in the ocean’s ecosystem. If their numbers drop too low, it will bring
danger to all ocean life.
2.Sharks can never be endangered because
they are the strongest at the food chain.(6.7.8)
)
True or False:
at the top of the food chain
in the ocean’s ecosystem
浮游生物
sharks
at the top of the food chain
in the ocean’s ecosystem
因为我们生存所需的氧气的70%是海洋中的浮游生物提供的，鲨鱼一旦灭绝，没有了天敌控制的其它海洋生物就会大量吞噬海洋浮游生物，造成地球的缺氧。海洋是地球上最重要的生态系统，起到调节气候和为其它生物提供食物的作用，因此拯救鲨鱼其实就是在拯救人类自己。
Saving the sharks is saving ourselves ! Protecting the sharks is protecting ourselves !
Scanning 寻读
Para3.
How to save the sharks .
1.What are the names of the two environmental protection groups
2. What have people done against(反对）finning
1.teach the public about finning.
猎鳍、割鳍行为
2.ask governments to develop laws to stop the sale of shark fins.
A:培养 B:壮大 C：完善
Scanning 寻读
Para3.
=
or
3. Is shark fin soup good for health
No scientific studies have shown that shark fins are good for health.
A: 科学的 B:理论的
So why eat them
中考链接
a number of the number of
相同点： 后都加 名词复数
不同点：a number of +名复， 意为许多；做主语是复数。
the number of +名复，意为......的数量，做主语是单数。
A number of _________(student ) ________(have ) an English class now . The number of _______(it/they) ________(be ) about 45.
中考链接
no longer / not....any longer意为不再
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中的any longer总是放在句末。no longer与not ... any longer可以互换
She ______ _______likes dancing.（同义句）
She _______like dancing _____ ______.
她不再喜欢跳舞了。
中考链接
be harmful to 对……有害
be bad for 对……有害
e.g. 吸烟有害健康。
电脑游戏玩太多对学生有害。(翻译)
Smoking the health.
Playing computer games much _____ students.
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。
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
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。
e.g. I used to get up at six o’clock.
be used to doing sth. 表示习惯于做某事
Joe is used to drinking a cup of coffee every morning.
1. 现在进行时: Present Progressive
3.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. Our classroom is cleaned every day.
4.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.
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.
You mustn’t play with fire. It is dangerous.
情态动词
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).
Have
taken
helped
considered
had
had
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!
took
think
came
trying
wait
v. 承担得起(后果); 买得起 afford to do sth.
We can’t afford to buy another house.
4b
Fill 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 ____ save
may/might
must
can
can would could
have to should must
may/ might
small things ______ add up and become big things that _________ improve the environment. Let’s take action now!
could
would/can
采取行动
4c
Make 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);
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
…
Discussion
I think that everyone should use public transportation.
I disagree. It’s difficult for parents with young children to use public transportation…
Should we let them disappear
My slogans
Save the animals !
Save ourselves !
Protect the animals !
Protect ourselves !
No trading , no killing !
Say no to shark fin soup !
Say no to eating the animals !
Let’s take action now !
Come on !
Homework
口头作业
1. Listen to 3a. Then recite it.
书面作业
1. Write an article about a kind of endangered animals to call on people to save them.
2. Review the grammar that we have learned
today and do exercises in your exercise book.