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(共54张PPT)
R·九年级全一册
Section A 3a-4c
Unit 13 We’re trying to
save the earth!
New words
残酷的；残忍的(adj.)
有害的(adj.)
工业；行业 (n.)
法律；法规(n.)
科学上的；科学的(adj.)
现在的(adj.)现在；礼物(n.)
承担得起；买得起(v.)
cruel
scientific
afford
harmful
law
industry
present
鲨鱼(n.)
(鱼)鳍(n.)
链子；链条 (n.)
生态系统(n.)
可重复使用的(adj.)
运输业；交通运输(n.)
shark
reusable
transportation
fin
ecosystem
chain
/ ɑ rk/
/f n/
/t e n/
/'i k s st m/
/ ri 'ju z bl/
/ tr nsp r'te n/
对……有害
在……顶部或顶端
食物链
参加
关掉
付费；付出代价
采取行动
be harmful to
at the top of
the food chain
take part in
turn off
pay for
take action
New phrases
Lead-in
sharks
Watch a video about sharks.
点击画面 播放视频
Save the sharks!
Skipping reading
Talk about shark fin soup.
Sharks are endangered now.
Appeal to people against
eating shark fins.
Para. 3
Para. 1
Para. 2
Read the title, the first and the last sentence of each paragraph and match the main ideas.
3a
Read the passage about sharks and complete the fact sheet below.
Number of sharks caught and traded every year
How governments can help
Two environmental groups against “finning”
Around 70 million
To develop laws to stop the sale of shark fins
WildAid and the WWF
Sharks are endangered, read the passage and judge the sentences.
Read the first paragraph
1. Shark fin soup is famous all around the world.
2. We have to kill a whole shark to get a bowl of
shark fin soup.
√
√
Read the second paragraph.
1. People cut off sharks’ fins and throw the sharks
back into the ocean.
2. Sharks are in the bottom of the food chain in the
ocean’s ecosystem.
√
×
n. 生态系统
食物链
Read the third paragraph.
1. WildAid and the WWF are environmental
protection groups in China.
2. Shark fins are good for health.
×
×
Many have heard of shark fin soup. But do you realize that you’re killing a whole shark each time you enjoy a bowl of shark fin soup
听说
Save the sharks!
When people catch sharks, they cut off their fins and throw the sharks back into the ocean. This is not only cruel, but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. 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.
不但……而且……
在……顶部或顶端
切下来；剪下来
不再
be harmful to…
对……有害
Many believe that sharks can never be endangered because they are the strongest in their food chain. But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
濒危的
Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. They have even asked governments to develop laws to stop the sale of shark fins. So far, no scientific studies have shown that shark fins are good for health, so why eat them Help save the sharks!
制定法律
people enjoy
____________________
fishermen ___________, ______________, then _______________________
________________________________decreased quickly
a bowl of shark fin soup
catch sharks
cut off their fins
throw them into the ocean
the numbers of some kinds of sharks
Read the first two paragraphs and fill in
the blanks.
Retell the passage.
A whole shark has been killed each time you enjoy a bowl of shark fin soup. When people catch sharks, they __________ their fins and throw the sharks back into the ocean.
cut off
Without a fin, a shark can __________ swim and slowly dies. If sharks’ numbers drop too low, it will _______________ all ocean life. _________________ some kinds of sharks have fallen ____ over 90 percent in the last 20 to 30 years.
no longer
bring danger to
The numbers of
by
Language points
1.This is not only cruel, but also harmful to the
environment.
not only…but also…是一个连词词组，意为“不但……而且……”用于肯定句中，常用来连接两个并列的句子成分。
例句：他不仅是我的老师，而且是我的好朋友。
He’s not only my teacher, but (also) my
good friend.
2. Sharks are at the top of the food chain in the
ocean’s ecosystem.
例句：把你的姓名写在页面的顶端。
Write your name at the top of the page.
at the top of 意为“在……顶部或顶端”
反义短语：at the bottom of 在……的底部
Read the passage again and fill in the blanks with the words in the box.
3b
so although if but when
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.
when
so
so although if but when
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 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.
but
Although
if
Grammar Focus
We’re trying to save the earth. Present progressive
The river used to be so clean. used to
The air is badly polluted. Passive voice
No scientific studies have shown that shark fins are good for health. Present perfect
We should help save the sharks. Modal verbs
时态 定义
现在进行时
现在完成时
被动语态
表示现在或现阶段正在发生或进行的动作
表示过去发生的动作对现在
产生的影响或结果
主语是谓语动作的承受者
时态 构成
现在进行时
现在完成时
被动语态
am / is/ are+动词-ing形式
have / has +动词过去分词
be + 动词过去分词
时态 常见标志词
现在进行时
现在完成时
now, at the moment(此刻), look, listen
already, just或yet
Fill in the blanks.
1. 听！一些女孩正在教室里唱歌。
Listen. Some girls ___________ in the classroom.
2. 他们已经打扫了教室。
They ______ already _______ the classroom.
are singing
have
cleaned
3. 这儿的人不说英语。
English ______ ________ by people here.
4. 我曾去过那个国家。
I ______ ever ______ to that country.
isn’t
spoken
have
been
情态动词具有一定的意义，但不能单独作谓语，其后需接动词原形一起构成句子的谓语。
(除have to以外)没有人称和数的变化
情态动词
常见的情态动词有：can, may, must, need,
have to, could, should, ought to
情态动词的常见用法
We can do it by ourselves.
It must be Tom’s. Look at his name on the cover.
3. May I see your ID card, sir
4. Should we finish our homework before noon
表能力
表推测
表请求、许可
表应该
4a
Fill in the blanks with the correct forms of the verbs in brackets.
Joe: ______ you ever ______ (take) part in an
environmental project
Ken: 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
Have
taken
helped
considered
had
had
took
Ken: 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.
Ken: Yes, we can’t afford to _____ (wait) any longer
to take action!
think
came
trying
wait
Language points
take part in意为“参加”。
例句：你参加过任何活动吗？
Did you take part in any activity
【辨析】take part in , join与 join in
take part in
join
join in
指参加某项活动（比赛）并在活动中起一定的作用。
指参加某党派、团体或参军等，并且成为其中的一员。
指参加某项活动，但多指正在进行的活动。
1. Did you ___________ the sports meeting yesterday
2. He ________ the army last year.
3. I hope you can ________ the discussion.
take part in
joined
join in
Fill in the blanks.
4b
can
would
could
have to
should
must
may/might
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 electricity by
turning off the lights when you leave a room. You _______________ also use reusable bags instead of plastic bags.
may/might
must/have to
can/should
can/should
Fill in the blanks with the appropriate modal verbs from the box.
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 small things ________ add up and become big things that _________________ improve the environment. Let’s take action now!
have to
can
can
can
can/ should
Make a list of things that people can do to help the environment and discuss your list with your partner.
4c
I think that everyone should
use public transportation.
I disagree. It’s difficult for
parents with young
children to use public
transportation…
Discussion
Ways people can use to help the environment.
recycle books and paper
bring a bag to go shopping
throw rubbish into the bin
Stop killing wild animals and protect them.
课堂小结
We’re trying to save the earth.
The river used to be so clean.
The air is badly polluted.
No scientific studies have shown that shark fins are good for health.
We should help save the sharks.
1. 如果它们（鲨鱼）的数目降至过低，会给所有
海洋生物带来危险。
If their numbers drop too low, it will bring danger
to all ocean life.
2. 但事实上，在这个行业，每年大约有七千万条
鲨鱼被捕捉和交易。
But in fact, around 70 million sharks are caught
and traded in this industry every year.
3. 在过去的二三十年里，一些种类的鲨鱼的数量
下降了百分之九十以上。
The numbers of some kinds of sharks have fallen
by over 90 percent in the last 20 to 30 years.
Exercise
一、用所给词的适当形式填空。
1. The old man used _____ (be) a teacher.
2. We should _____ (clean) the room every day.
3. Look! Tom _________ (sleep) in his room.
4. Lots of trees __________ (plant) on the hill every year.
5. He _________ (live) here for 20 years.
to be
clean
is sleeping
are planted
has lived
1. He promised to pick me up at the school gate.
However, he _____ yet.
A. didn’t arrive B. doesn’t arrive
C. isn’t arriving D. hasn’t arrived
2. Ba Jin, one of the greatest writers in China, ___
as “People’s Writer”.
A. is regarded B. has regarded
C. is regarding D. regards
二、单项选择。
3. —At present, one of the best ways to study is
working in groups.
—More chances ______ to students to learn from
each other.
A. offer B. are offered
C. have offered D. are offering
Homework
1. Read the article and review key words, sentences
and language points.
Review the grammar focus we have learned in this period.
Do the exercises.

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