Unit 13 We are trying to save the earth Section A 3a-3c课件(共36张PPT)

(共36张PPT)
九年级英语下册（RJ）教学课件
Section A
Unit 13 We are trying to save the earth.
3a-3c
Revision
Jason and Susan, what are your ideas for solving these problems
Role-play 2d.
Well, to cut down air pollution, we should take the bus or subway instead of driving.
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!
Translate 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.
Warming up
The earth is badly polluted.
What should we do to save the earth
Turn off the lights
when you leave a room.
Recycle books and paper.
Take buses instead of driving cars.
Let’s take action (采取行动)
There 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:
Sharks are endangered, read the
passage and judge the sentences.
Read the first paragraph
1. Shark’s fin（鱼鳍）soup is famous and
expensive all around the world.
2. We have to kill a whole shark to get a
bowl of shark’s 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’s fins are good for health.
×
×
3a
Read the passage about sharks and complete the fact sheet below.
Many have heard of shark’s fin soup. This famous and
expensive dish is especially popular in southern China.
But do you realize that you’re killing a whole shark
each time you enjoy a
bowl of shark’s fin soup
When people catch
sharks, they cut off their
fins and throw the shark
back into the ocean.
Without a fin, a shark can no longer swim and slowly dies. This method is not only cruel, but also harmful to the environment. 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. 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.
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’s fins. So far, no scientific studies have shown that shark’s fins are good for health, so why eat them Help save the sharks!
southern China
70 million
over 90 percent
WildAid and the WWF
3b
3c
Read 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.
when
so
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
adj. 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 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。
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 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。
3.Complete the student’s book lessons.
1. Finish your composition.
2. Review the whole unit.
Homework