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Unit 13 We’re trying to save the earth!
Period2
Section A(3a - 4c)
学习目标
Period 2
Section A (3a - 4c)
1.读懂含有shark，finning, industry, cruel, harmful, ecosystem等词汇的语篇,并完成鱼骨图。
2.借助鱼骨图，完成课文复述。
3.运用所学,制作海报发表保护鲨鱼的公益演讲。
4.通过观看视频,关注动物保护工作，提升环境保护意识。
情 境 导 入
Word bank
shark n. 鲨鱼
fin n. 鱼鳍
otter n. 水獭
ecosystem n. 生态系统
food chain n. 食物链
fierce adj. 凶猛的
endangered adj.濒临灭绝的
be harmful to 对......有害
cut off 割掉
bear paws 熊掌
throw away 扔掉
take actions 采取行动
[f s]
[' t ]
[ 'i k s st m]
[ n'de nd d]
情 境 导 入
情 境 导 入
A shark’s story
What do you
think of sharks
[ ɑ ks]
情 境 导 入
Sharks are ______.
dangerous
fierce
scary
[f s]
情 境 导 入
Lenny
He lived a happy life with his parents!
We are at the top of food chain
in the ocean’s ecosystem.
A shark’s story
情 境 导 入
ocean’s ecosystem
food chain
at the top of the food chain
A shark’s story
情 境 导 入
Do you want to help him
A shark’s story
情 境 导 入
What
What
Sharks
How
What
This mind-map will help us.
Complete the fishbone diagram!
新 课 探 究
Period2
Section A(3a - 4c)
A shark’s tears
What happened to Lenny’s father
Fast reading
A
He went to travel in...
C
He was killed by...
B
He was caught by...
Why
Fast reading
Match each paragraph with its main idea.
Sharks are endangered
Help save the sharks
新课探究
情境导入
课堂小结
Shark fin soup
A shark’s tears
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Close reading
A shark’s tears
Para 1
What do you know about shark fin soup
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What
What
Sharks
How
What
Complete the fishbone diagram!
Read para 1 and complete the first part.
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Save the sharks!
What
What
Sharks
How
What
famous/expensive/popular
You're killing a whole shark
each time...
═
Read para 1 and complete the first part.
Complete the fishbone diagram!
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Save the sharks !
Para 2
1.How do people get shark fins
A shark’s tears
Close reading
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What
What
Sharks
How
What
Thisfamous/expensive/popular
You're killing a whole shark
each time...
═
catch
cut off
throw back
Complete the fishbone diagram!
Read para 2 and complete the second part.
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新课探究
The process is called finning, and this has developed into an industry.
Sharks’ tears
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2.What does industry mean
现象
产业
How does the writer feel about finning
Check( ).
The process is called finning, and this has developed into an industry.
Para 2
1.What’s the meaning of finning
割鳍弃鲨
Sharks’s tears
Close reading
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Save the sharks !
Para 2
2.How does the writer feel
A shark’s tears
Close reading
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What
What
Sharks
How
What
famous/expensive/popular
killing a whole shark
catch
cut off
throw back
not only cruel...but also
harmful to the environment

Complete the fishbone diagram!
Read para 2 and complete the second part.
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新课探究
Save the sharks !
Para 2
3.Why is it not only cruel but harmful
Sharks’s tears
Close reading
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Why is it not only cruel but harmful to the environment
Without a fin, a shark can no longer _____ and slowly____.
Sharks are at ________________. If their numbers drop too low, it will _________________all ocean life.
swim
dies
ocean’s ecosystem
bring danger to
close reading
Sharks’s tears
Para 2
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Save the sharks !
Para 2
3.Can you list some facts that the
number of sharks are dropping fast
Sharks’s tears
Close reading
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新课探究
Complete the fishbone diagram!
What
What
Sharks
How
What
famous/expensive/popular
killing a whole shark
catch
cut off
throw back
not only cruel,but also harmful
to the environment
Read para 2 and complete the second part.
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Sharks’s tears
close reading
Can you list some facts that the number of sharks are dropping fast
1.Around____________ sharks are caught and traded in this industry every year.
2.The numbers of some kinds of sharks have fallen by over ______________ in the last________________.
What's the result
70 million
90 percent
20 to 30 years
Para 2
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新课探究
Complete the fishbone diagram!
What
What
Sharks
How
What
famous/expensive/popular
killing a whole shark
catch
cut off
throw back
not only cruel,but also harmful
to the environment
around…caught&traded...
the numbers..have fallen by...
Read para 2 and complete the third part.
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新课探究
take actions
What you think of sharks now
dangerous
endangered
Save the Sharks!
Redemption of sharks
Thinking
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Close reading
Para 3
Redemption of sharks
1.What are the environmental protection groups
2.What do they do to protect the sharks
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What
What
Sharks
How
What
famous/expensive/popular
killing a whole shark
catch
cut off
throw back
not only cruel,but also harmful to the environment
around…caught&traded...
the numbers..fallen by..
WildAid/WWF
teach.. about...
ask..develop laws to stop...
Retelling
save the sarks!
Complete the fishbone diagram!
endangered
Read para 3 and complete the fourth part.
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新课探究
Thinking
As students, what can we do to protect
the Sharks
Redemption of sharks
1. Don’t eat shark fin soup.
2. Make posters and tell the public to protect sharks.
3.Write letters to the government...
...
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新课探究
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
3b
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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
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新课探究
1. A shark can no longer swim and slowly dies.
no longer意思是“不再”
有两个短语和no longer同义，即not…any longer和not…any more，但它们侧重的方面不同。
Language points
no longer和not…any longer侧重时间。
例：He no longer lives here. = He doesn’t live here any longer. 他不在这儿居住了。
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2. This method is not only cruel, but also
harmful to the environment.
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“不但……而且……；不仅……还”;
其中的also有时可以省略。
例：She not only plays well, but also writes music.她不但很会演奏，而且还会作曲。
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例: Smoking is harmful to health. 吸烟有害
健康。
be harmful to 对……有害
例: Playing computer games too much is harmful to students.电脑游戏玩太多对学生有害。
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3. Sharks are at the top of the food chain in
the ocean’s ecosystem.
at the top of 在……最高地位; 用最高/最大的(速度, 声音等)
例：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。
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新课探究
4. If their numbers drop too low, it will bring danger
to all ocean life.
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。
例：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。
常与number搭配的动词有grow, fall等。
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新课探究
5. Environmental protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”.
(1) 句中fin本为名词，指 “鱼鳍”。此句中的finning由动词fin（割鲨鱼鳍以获取鱼翅）加-ing转化而成，指课文中所陈述的 “猎翅”这一行为。
（2）WildAid和WWF组织
美国野生救援协会和世界自然基金会
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Grammar Focus
We’re trying to save the earth. Present progressive
The river used to be so clean. used to
The air is badly polluted. Passive voice
No scientific studies have shown that shark fins are good for health. Present perfect
We should help save the sharks. Modal verbs
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新课探究
1.现在进行时: Present Progressive
结构: be (am/is/are) + v.-ing
标志词：look, listen, now, right now…
例： Look! The boy is crying.
看！那男孩子在哭。
She is writing to her grandma right
now. 她正给自己的外祖母写信。
定义：表示说话时(瞬间)正在进行的动作, 也表示目前或现阶段正在进行的动作。
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used to do sth. 表示过去常常做某事, 而现
在不做了, 后接动词原形。
be used to doing sth. 表示习惯于做某事
2.used to do与be used to doing
例：I used to get up at six o’clock.
我过去常常六点钟起床。
Joe is used to drinking a cup of coffee every morning.
乔习惯每天早上喝一杯咖啡。
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3.被动语态：Passive voice
定义：表示主语是动作的承受者，即行为动作的对象的一种语态。
结构：be + 过去分词
例： A new school was built in our town last
year.
去年我们镇上修了所新学校。
Our classroom is cleaned by the cleaners every day. 每天清洁工都会打扫我们的教室。
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结构: has/have + 过去分词
标志词：already, yet, ever, never, since, for…
定义：表示动作已经完成, 但对现在造成影响;
或者表示从过去某一时间开始一直延续到现在
并还可能持续下去的动作。
4.现在完成时: Present Perfect
例：I haven’t finished my homework yet.
Linda has been in China for many years.
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新课探究
（1）情态动词本身有一定的词义, 表示说话人
的情绪、态度或语气, 但不能单独作谓语,
只能与其他动词一起构成谓语。
常见的情态动词: can (could), may (might),
must, need, shall (should), will (would)等。
（2）情态动词无人称和数的变化, 后接动词
原形。否定式是在情态动词后面加not。
个别情态动词有过去式形式, 可用来表达更加
客气、委婉的语气。
5.情态动词
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新课探究
Fill in the blanks with the correct
forms of the verbs in brackets.
Joe: _____ you ever ______ (take) part in
an environmental project
Eric: Yes, I have. I ______ (help) with a
Clean-Up Day last year. It was
__________ (consider) the biggest
clean-up project this city ____ ever
____ (have).
Have
taken
helped
considered
had
had
参加
4a
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Joe: How many people ____ (take) part
Eric: I _____ (think) more than 1,000
people ______ (come) to help out.
Joe: That’s fantastic! I guess everyone in
this city is ______ (try) to improve
the environment.
Eric: Yes, we can’t afford to ____ (wait)
any longer to take action!
took
think
came
trying
wait
v. 承担得起(后果); 买得起
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新课探究
Fill in the blanks with the appropriate
modal verbs from the box.
People __________ think that big things
______ be done to save the earth. Many
forget that saving the earth begins with
small things. For example, you ____ save
electricity by turning off the lights when
may/might
must
can
can would could have to should must may/ might
4b
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you leave a room. You ______ also use
reusable bags instead of plastic bags. I think it’s a great idea that you now ______ pay for plastic bags in some stores. And instead of driving to school or work, you __________ ride your bike or walk. If it’s far, you __________ take the bus. All these small things ______ add up and become big things that _________ improve the environment. Let’s take action now!
could
have to
can/should
can/could
adj.可重复使用的
could
would/can
采取行动
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Make a list of things that people can
do to help the environment and discuss your list with your partner.
use public transportation (n.交通运输)
4c
A:I think that everyone should use public
transportation.
B:I disagree. It’s difficult for parents with
young children to use public transportation
…
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Exercises
4. The twins ___________ (wash) their clothes for an hour.
5. He _________ (play) basketball since three years ago.
6. How long ____ Sally _____ (sing) yet
have washed
has played
has
sung
一、填空
I _________ (be) in Beijing for two years.
2. I _____ never _____ (hear) of that man before.
3. Tom __________ (work) there since
two years ago.
have been
have
heard
has worked
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二、翻译下列句子。
1. 她过去常常周末和朋友闲逛。
She used to hang out with friends on
weekends.
2. 他习惯每天晚上熬夜。
He is used to staying up every night.
3. 刚才一些老年人参观了博物馆。(被动语态)
Exercises:
The museum was visited by some old people just now.
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Different kinds of machines are used to
work by the workers.
4. 工人使用不同种类的机器工作。(被动语态)
5. 我们不能在教室里吃东西。
We can’t eat in the classroom.
6.首先你必须完成作业。
You must finish your homework first.
7.他现在不可能在家。
He can’t be at home now.
课 堂 小 结
Period2
Section A(3a - 4c)
Key words & phrases:
cruel, harmful, industry, law, reusable,
scientific, take part in, afford, turn off,
pay for, take action，be harmful to,
Key sentences:
1. We're trying to save the earth.
2. The river used to be so clean.
3. No scientific studies have shown that shark fins
are good for health.
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课堂小结
Grammar
1.现在进行时的用法
2.used to do与be used to doing的用法
3.被动语态的用法
4.现在完成时的用法
5.情态动词的用法
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Homework
课堂小结
Necessary：
1.Make a speech about saving the sharks to your family and friends.
Optional：
2.Do more research on the internet about endangered animals and what can we do to help them.Then share with your classmates.
THANK YOU

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