Unit13 We're trying to save the earth! SectionA 3a-3b 课件(共37张PPT)

(共37张PPT)
Section A 3a-3b
Air pollution
Water pollution
Land pollution
Waste pollution
Noise pollution
Not only is the earth polluted, but also
some animals are endangered.
Shark 鲨鱼
1. Have you ever seen
a shark（鲨鱼）
2. What do you know
about sharks
The shark fin soup
1800.00RMB
each bowl
It comes….
Read the first paragraph and judge the sentences
1. Shark fin（鱼鳍）soup is famous and
expensive all around the world.
2. If we get a bowl of shark fin soup, We will kill a whole shark .
×
√
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 second paragraph again
and answer the following questions.
1. What do people do when they catch a shark
2. What will happen to a shark if it doesn’t have a fin
Without a fin, a shark no longer swim and slowly dies.
They cut off their fins and throw the sharks back into the ocean.
3. If sharks’ number drop too low, what will it bring？
4.How many sharks are caught and traded
every year
5.How are the numbers of some kinds of sharks
It will bring danger to all ocean life
Around 70 million .
They have fallen by over 90 percent in the last 20 to 30 years.
The shark is being killed.
The man is cutting the fin off.
Sharks are
in danger…..
“Help me ,save me …please’’救救我吧
What should we do
Yao Ming ,the Chinese basketball star , are calling
on us to protect sharks. As what he said in the Ad，
when the buying stops, the killing can too.
Read the third paragraph
1. WildAid and the WWF are environmental
protection groups in China.
2. Shark fins are good for health.
×
×
保护环境，人人有责
Everyone should play a part in environmental protection.
Where shark fin soup is popular
Number of sharks caught
and traded every year
How governments can help
Two environmental groups
which are against “finning”
In southern China
Around 70 million
By developing laws
to stop the sale of
shark fins
WildAid and the WWF
3a
Read the passage about sharks and complete the fact sheet below.
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 is not only cruel, but also
harmful to the environment.
这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。
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。
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。
3b
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