(共33张PPT)
（人教新目标版）九年级全
Period 2 Section A 3a-3b
Unit 13
We’re trying to save the earth!
Learning objectives
Key words & phrases：
cruel，harmful，industry，law，scientific
be harmful to，at the top of，the food chain
Key sentences：
1.Many have heard of shark fin soup.
2.If their numbers drop too low，it will bring danger to all ocean life.
3.The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
4.So far，no scientific studies have shown that shark fins are good for health，so why eat them
Key structure：
Review of tenses：be＋doing；used to＋do；have/has＋done；be＋done；should＋do
shark
n. 鲨鱼
fin
e.g. You're killing a whole shark each time you enjoy a bowl of shark fin soup.
每次享用一碗鱼翅汤，你都会杀死一整条鲨鱼。
n. （鱼）鳍
New words
cruel
adj. 残酷的；残忍的
harmful
e.g. Killing sharks is not only cruel, but also harmful to the environment.
杀死鲨鱼不仅残忍，而且对环境有害。
adj. 有害的
be harmful to
对……有害
New words
e.g. Within a food chain, some living things are producers and some are consumers.
在食物链中, 有些生物是生产者, 有些是消费者。
at the top of
在……顶部或顶端
chain
n. 链子；链条
the food chain
食物链
ecosystem
n. 生态系统
New words
industry
n. 工业；行业
law
n. 法律；法规
e.g. We need to develop local industries.
我们需要发展地方工业。
New laws should be developed to stop the killing.
应该制定新的法律来制止这种杀戮。
New words
scientific
adj. 科学上的；科学的
e.g. No scientific studies have shown that shark fins are good for health.
没有科学研究表明鱼翅对健康有益。
New words
Who eats who
Put them where you think is suitable.
Lead in
What do you know about sharks
1. The world's biggest living fish is a shark.
2. Sharks can grow, lose and replace their teeth as needed.
3. Sharks are built for speed.
4. Sharks may lay eggs, or bear live young. (可卵生，可胎生)
5. Some sharks are at risk of extinction(灭绝).
As the top predators in the ocean, why are they facing the risk of extinction
掠食者
Let’s save the sharks!
Lead in
While-reading
A. The shark fin soup is famous.
B. The sharks are endangered in the world.
C. People cut off shark's fins to make the shark fin soup.
What's the main idea of the passage
While-reading
Read the passage and complete the main idea of each paragraph.
Solutions
Problem
Facts
__________ of shark fin soup
_________________ of killing sharks
_______ to save sharks
Popularity
Ways and results
Actions
While-reading
Read carefully and finish the exercises.
Read Para. 1 and write T for true or F for false.
( )You're killing a whole shark when you enjoy a bowl of shark fin soup.
T
While-reading
Read Para. 2 and answer the question.
How do people get the fins of sharks
When people _______ sharks, they _______ their fins and _________ the sharks ___________ the ocean.
catch
cut off
throw
back into
catch
cut off
throw... back into
This is not only cruel, but also harmful to the environment.
While-reading
cruel
harmful
Without a fin, a shark can _________ swim and slowly _____.
no longer
dies
1. Sharks are ____________ the food chain in the ocean's ecosystem.
2. If their numbers drop too low, it will ______________ all ocean life.
at the top of
bring danger to
Fill in the blanks.
_______ the balance(平衡) of the ocean’s ecosystem.
Break
While-reading
( )Sharks can never be endangered.
F
1. Around 70 million sharks __________(catch) and ______(trade) in this industry every year.
2. The numbers of some kinds of sharks _________ (fall) by over 90 percent in the last 20 to 30 years.
in fact
are caught
traded
have fallen
Read Para. 2 again and write T for true or F for false. Then find out the facts to support your judgment.
While-reading
Retell Para. 2.
When people catch sharks, they cut off their fins and throw the sharks back into the ocean.
cruel
harmful
Without a fin, a shark can no longer swim and slowly dies.
1. Sharks are at the top of the food chain in the ocean's ecosystem.
2. If their numbers drop too low, it will bring danger to all ocean life.
1. Around 70 million sharks are caught and traded in this industry every year.
2. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
in fact
Sharks are endangered.
1. What are WildAid and the WWF
So far, no scientific studies have shown that shark fins are good for health.
They are two environmental protection groups.
2. Are shark fins good for health
Read Para. 3 and answer the questions.
While-reading
Read the passage about sharks and complete the fact sheet below.
3a
Number of sharks caught and traded every year
How governments can help
Two environmental groups against "finning"
70 million
develop laws to stop the sale of shark fins
WildAid & the WWF
P99
While-reading
Pay attention to the expressions.
hear of 听说
每次
砍掉；切断
not only...but also...
不但……而且……
be harmful to
对……有害
在……的顶端
目前为止，迄今为止
对……有好处
hear of
each time
cut off
not only...but also...
be harmful to
at the top of
so far
be good for
1. 听说
2. 每次
3. 砍掉；切断
4. 不但……，而且……
5. 对……有害
6. 在……的顶端
7. 迄今为止
8. 对……有好处
Translate the phrases into English.
Post-reading
when
so
but
Although
if
so although if but when
Read the passage again and fill in the blanks with the words in the box.
3b
P99
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.
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.
Post-reading
There are many animals endangered because of human hunting and sale.
You can help save them.
Post-reading
1. A shark can no longer swim and slowly dies.
鲨鱼不能再游泳了，慢慢地就死了。
no longer
① He no longer lives here.
② He knows that he is no longer young.
不再……
他不再住这儿了。
他知道自己不再年轻。
Language points
2. This method is not only cruel, but also harmful to the environment.
这种方法不仅残忍，而且对环境有害。
(1) not only …but also
not only常和but also搭配，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……"。
Language points
① Not only the students but also the teacher was invited.
② He not only read the book, but also remembered what he had read.
③ Not only did he turn up late, he also forgot his books.
④ If this project fails, it will affect not only our department, but also the whole organization.
不仅学生们被邀请，那位教师也被邀请了。
他不但读了这本书，而且记得所读的内容。
他不但迟到了，还忘了带书。
如果这个项目失败，不仅会影响到我们部门，还会对整个机构产生影响。
not only …but also连接主语时，其谓语通常与靠近的主语保持一致。
若连接两个句子，not only在句首，其后面的句子要用倒装。
Language points
1. Not only you but also he ______(have to) leave.
2. Not only you but also I _____(be) fond of music.
has to
am
Language points
be harmful to
① Fruit juices can be harmful to children's teeth.
② Playing computer games too much is harmful to students.
对……有害
果汁可能损坏儿童的牙齿。
电脑游戏玩太多对学生有害。
3. This method is not only cruel, but also harmful to the environment.
Language points
at the top of
① She was standing at the top of the stairs.
② We have a lot of things to do, but packing is at the top of the list.
在……顶端
她站在楼梯的顶端。
我们有许多事情要做，但首先是打点行装。
鲨鱼处于海洋生态系统食物链的顶端。
4. Sharks are at the top of the food chain in the ocean's ecosystem.
Language points
1. Can you retell the passage
2. Can you talk about protecting wild animals and respecting the nature
What problems do sharks face
Why do sharks need to be saved
Why should we save the sharks
How to save the sharks
Self-evaluation
1. Work in groups and talk about how to save the endangered animals. Then write down the suggestions.
2. Add information about saving the endangered animals to your poster about saving the earth.
Homework
