Unit 13 We're trying to save the earth! Section A (3a-4c) 课件 (共45张PPT)

(共45张PPT)
Unit 13
We’re trying to save the earth!
Section A (3a~4c)
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There are some animals are endangered. We should do something to protect the animals and the environment!
Save the earth! Save the animals.
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The zoos provide homes for many endangered animals.
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Free Talk
1. Have you ever seen
a shark（鲨鱼）
2. What do you know
about sharks
Discuss with your partner:
Language Goal
新知学习
课堂小结
当堂检测
学习目标
重点研讨
1. 能熟悉并正确运用本课时的重点单词和短语
2. 能用英语谈论鲨鱼现状和保护方式
3. 能熟练运用现在进行时等时态及情态动词
新知学习
课堂小结
当堂检测
学习目标
重点研讨
3a
Read the passage quickly and complete below.
Para.1 A. Two groups against “finning”.
Para.2 B. Something about shark fin soup.
Para.3 C. Sharks are endangered now.
鳍
新知学习
课堂小结
当堂检测
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重点研讨
Many have heard of shark fin soup. This famous and expensive dish is especially popular in southern China. But do you realize that you’re killing a whole shark each time you enjoy a bowl of shark fin soup
新知学习
课堂小结
当堂检测
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shark fin soup
1. Where is shark fin soup popular
2. What does it mean when people
enjoy a bowl of shark fin soup
Read Para. 1
southern China
They’re killing a whole shark when
they enjoy a bowl of shark fin soup.
新知学习
课堂小结
当堂检测
学习目标
重点研讨
When people catch sharks, they cut off their fins and throw the shark back into the ocean. This is not only cruel, but also harmful to the environment. Without a fin, a shark can no longer swim and slowly dies. Sharks are at the top of the food chain in the ocean’s ecosystem. If their numbers drop too low, it will bring danger to all ocean life. Many believe that sharks can never be endangered because they are the strongest in their food chain. But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years.
新知学习
课堂小结
当堂检测
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重点研讨
Read Para. 2
1.Why is it harmful to the environment
2. What do the two numbers mean
70 million
90 percent
Sharks are at the top of the food chain, so if their numbers drop too low, it will bring danger to all ocean life.
Around 70 million sharks are caught and traded every year.
The numbers of some kinds of sharks have fallen by over
90 percent in the past 20 to 30 years.
新知学习
课堂小结
当堂检测
学习目标
重点研讨
Environmental protection groups around the world, such
as WildAid and the WWF, are teaching the public about
“finning”. They have even asked governments to develop
laws to stop the sale of shark fins. So far, no scientific
studies have shown that shark fins are good for health, so
why eat them Help save the sharks!
新知学习
课堂小结
当堂检测
学习目标
重点研讨
Read Para. 3
1. What are the two environmental protection groups
美国野生救援会(WildAid)是1999年在美国注册的非盈利机构，总部在美国旧金山，它对濒临绝迹的野生动物提供直接的保护，并且发展许多有创意的计划，以教育大众关于野生动物及生态平衡的重要性。
世界自然基金会(WWF)是在全球享有盛誉的、最大的独立性非政府环境保护组织之一，自1961年成立以来，WWF一直致力于环保事业，在全世界拥有超过500万支持者和超过100个国家参与的项目网络。
新知学习
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当堂检测
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重点研讨
2. What are they doing and what have they done
They are teaching the public about “finning”.
They have even asked governments to develop laws(法律) to stop the sale of shark fins.
Read Para. 3
新知学习
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当堂检测
学习目标
重点研讨
Where shark fin soup is popular
Number of sharks caught and traded every year
How governments can help
Two environmental groups against "finning"
70 million
WildAid and the WWF
southern China
Complete the fact sheet below.
develop laws to stop the
sale of shark fins.
新知学习
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当堂检测
学习目标
重点研讨
3b
Read the passage again and fill in the blanks with the words in the box.
so although if but when
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.
so
when
新知学习
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so although if but when
Many think that sharks are too strong to be
endangered, _________ they are wrong.
_________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
新知学习
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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。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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。
新知学习
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当堂检测
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重点研讨
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。)
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
5
Environmental 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。
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。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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 perferct
We should help save the sharks. Modal verbs
新知学习
课堂小结
当堂检测
学习目标
重点研讨
现在进行时: Present Progressive
结构: be (am/is/are) + v.-ing
标志词: look, listen, now, right now…
e.g. Look! The boy is crying.
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。
新知学习
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当堂检测
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重点研讨
Exercise
What a fine day today!
Look! What are they doing
新知学习
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当堂检测
学习目标
重点研讨
used to do与be used to doing
used to do sth. 表示过去常常做某事, 而现在往往
不做了, 后接动词原形。
be used to doing sth. 表示习惯于做某事
e.g. I used to get up at six o’clock. 我过去常常六点起床。
Joe is used to drinking a cup of coffee every morning.
乔每天早上习惯喝一杯咖啡。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
Translation.
1. 她过去常常周末和朋友闲逛。
2. 他习惯于每天晚上熬夜。
Exercise
She used to hang out with friends on weekends.
He is used to staying up every night.
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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
e.g. A new school was built last year.
去年新建了一所学校。
Our classroom is cleaned every day.
我们的教室每天打扫。
新知学习
课堂小结
当堂检测
学习目标
重点研讨
Translate the sentences by using Passive voice.
1. 刚才一些老年人参观了博物馆。
2. 工人们使用不同种类的机器工作。
The museum was visited by some old people just now.
Different kinds of machines are used to work by the workers.
Exercise
新知学习
课堂小结
当堂检测
学习目标
重点研讨
结构: has/have + 过去分词
标志词：already, yet, ever, never, since, for…
e.g. I haven’t finished my homework yet.
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。
现在完成时: Present Perfect
新知学习
课堂小结
当堂检测
学习目标
重点研讨
Exercise
Complete the following sentences.
I _________ (be) in Beijing for two years.
2. I _____ never _____ (hear) of that man before.
3. Tom __________ (work) there since two years ago.
4. The twins ___________ (wash) the clothes for an hour.
5. He _________ (play) basketball since three years ago.
6. How long ____ Sally _____ (sing) yet
have been
have
heard
has worked
have washed
has played
has
sung
新知学习
课堂小结
当堂检测
学习目标
重点研讨
情态动词
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, 只能与其他动词构成谓语。
常见的有: can (could), may (might), must, need, shall (should), will (would)等。
新知学习
课堂小结
当堂检测
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重点研讨
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。
e.g. Ken can climb up the tress like a koala.
Tracy could ride a bicycle when she was five years old.
You mustn’t play with fire. It is dangerous.
新知学习
课堂小结
当堂检测
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重点研讨
Translation.
1. 我们不能在教室里吃东西。
2. 首先你必须完成作业。
3. 他现在不可能在家。
4. 她一定知道这个问题的答案。
We can’t eat in the classroom.
You must finish your homework first.
He can’t be at home now.
She must know the answer to this question.
Exercise
新知学习
课堂小结
当堂检测
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重点研讨
4a
Fill in the blanks with the correct forms of the verbs in brackets.
Joe: _____you ever _____ (take) part in an environmental project
Ken: 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
新知学习
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当堂检测
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重点研讨
Joe: How many people ______ (take) part
Ken: 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.
Ken: Yes, we can't afford to _____ (wait) any longer
to take action!
took
think
came
trying
wait
新知学习
课堂小结
当堂检测
学习目标
重点研讨
4b
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 you leave a room. You _____ also use reusable bags instead of plastic bags.
may
must
could
could
can would could have to should must may/might
新知学习
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当堂检测
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重点研讨
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 good things that ____ improve the environment. Let’s take action now!
have to
can
could
can
can would could have to should must may/might
can
新知学习
课堂小结
当堂检测
学习目标
重点研讨
4c
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); …
I think that everyone should use public transportation.
I disagree. It’s difficult for parents with young children to use public transportation…
重要语法：
现在进行时
现在完成时
被动语态
情态动词
used to句型
重要短语：
no longer 不再
not only…but also…不仅……
而且……
be harmful to 对……有害
at the top of 在……最高地位
Unit 13
Section A (3a~4c)
新知学习
课堂小结
当堂检测
学习目标
重点研讨
新知学习
课堂小结
当堂检测
学习目标
重点研讨
一、用括号中所给单词的适当形式填空。
1.Waste paper and bottles ____________(collect) for recycling.
2.Could you please turn down the TV Your brother___________
(review) his lessons.
3. All of us ___________ (pass) the exam. How happy we are!
4.Three patients ________________(operate) on by the famous
doctor in the past 10 hours.
5.Mike missed the chair and fell down. Luckily, he was not
______(bad) hurt.
are collected
is reviewing
have passed
have been operated
badly
新知学习
课堂小结
当堂检测
学习目标
重点研讨
二、完成句子。
1．工人们正在竭尽全力降低事故率。
The workers are doing all they can ____ ____ _____ the accident rate.
2．我的家乡的天空过去常常是蓝色的。
The sky in my hometown ____ ___ ___ blue.
3．我们的行动会使它变得不同，并通向更好的未来。
Our action can _____ ____ ________ and lead to a better future.
4．旧的楼房已经被拆除了。
The old buildings _____ _____ _____ _____.
5．我们很高兴看到我们的城市在过去的几年里变得越来越美丽。
We are happy to see our city ____ ______ more and more beautiful
in the _____ ____ ____ ．
make a difference
used to be
to cut down
have been pulled down
has become
past few years