人教版九年级下册 Unit13 We're trying to save the earth! SectionA 3a-3b 课件(共22张PPT，无音频)

(共22张PPT)
Section A
3a-3b
Shark fin soup
fin
What do you know
about sharks
Sharks are endangered
Para 1.
Para. 2
Para. 3
Bad things happen when people cut off sharks’ fins.
Environmental protection groups have done things to protect sharks.
You’re killing a whole shark when you enjoy a bowl of shark fin soup.
Skim the text ,find the main idea of each paragraph
Where shark fin soup is popular
Number of sharks caught
and traded every year
How much the numbers of
some kinds of sharks have
fallen in the last 20 to 30
years
Two environmental groups
which are against “finning”
southern China
70 million
over 90 percent
WildAid and the WWF
3a
Read the passage about sharks and complete the fact sheet below.
Listen.
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
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 can he sing ,but also he can dance.
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。
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。
There are some animals are endangered. We should do something to protect the animals and the environment!
What should we do to save the earth
GROUP WORK