Unit 13 We're trying to save the earth SectionA(3a~3b）课件(共18张PPT)

(共18张PPT)
Unit 13
We’re trying to save the earth!
Section A (3a~3b)
01
学习目标
能理解并运用下列重点单词和短语：cruel, harmful, industry, law, scientific, be harmful to, at the top of, the food chain等。
能通过略读精读的阅读策略和识别文章中的连接词，掌握文章大意，了解鲨鱼现状和保护方式。
02
新课讲授
what’s your feelings
sad
shocked
......
Read fast and finish.
Paragragh 1 talks about soup.
Paragragh 2 says sharks are now.
Paragragh 3 calls on （号召） people eating shark fins.
shark fin
endangered
stop
Read paragragh1 and answer.
1. What people kill the sharks for
For their fins.
2. What’s the meaning of enjoying a bowl of shark fin soup
It means killing a whole shark.
Read paragragh 2 and fill in the blanks.
People sharks’ fins and
throw them back to the ocean.
This is very and o to the environment.
Sharks can’t and will without fins.
The number of sharks drops too low which bring to other sea lives because they are at the top of .
Around sharks are caught and traded.
The numbers of some kinds of sharks have fallen by over in the last 20 to 30 years.
cut off
cruel
harmful
swim
die
down
ocean’s ecosystem
70 million
90 percent
Read paragragh 3 and answer.
1.What are the names of the two environmental protection groups
2. What have people done against(反对）finning？
3. Do you think the shark fin soup is good for health
They teach the public about finning and ask governments to
develop laws to stop the sales of shark fins.
No scientific studies have shown that shark fins are good for health.
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.
3b
Read the passage again and fill in the blanks with the words in the box.
when
so
but
Although
if
Discussion
What can we do for them
Together,
they and we!
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。
Language points
【辨析】no longer和not…any longer
2) 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。)
1) 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。)
Language points
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。
1) 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。
Language points
A.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。
B. 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。
Language points
2) be harmful to 对……有害
e.g. Smoking is harmful to health.
吸烟有害健康。
Playing computer games too much is harmful to students.
电脑游戏玩太多对学生有害。
Language points
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……顶部或顶端
e.g. I looked at the top of his head, his hair shiny and parted
smoothly.我看他的头顶, 头发闪亮且平滑地分开。
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。
Language points
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。
常与number搭配的动词还有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。