Unit 13 We're trying to save the earth ! Section A 自学探究课件(共63张PPT)

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名称 Unit 13 We're trying to save the earth ! Section A 自学探究课件(共63张PPT)
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更新时间 2023-12-23 21:56:40

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(共63张PPT)
Unit 13 We're trying to save the earth !
Section A

一、生词速查(根据中文写出英语单词)
1.  litter  v.乱扔,也可作  名  词,意为“  垃圾;废弃物  ”
2.  bottom  n. 底部;最下部→反义词  top  顶部
3.  fisherman  n. 渔民;钓鱼的人→复数  fishermen 
4.  coal  n. 煤;煤块
5.  ugly  adj.丑陋的;难看的→反义词 beautiful  美丽的
litter

垃圾;废弃

bottom
top
fisherman
fishermen
coal
ugly
beautiful
6.  advantage  n. 优点;有利条件→反义词  disadvan缺点;不利条件
7.  cost  v. 花费→过去式  cost  →过去分词  cost 
8.  wooden  adj.木制的;木头的→n.  wood  木头;森林
9.  plastic  n. 塑料;塑胶
10.  takeaway  n. 外卖食物
11.  bin  n. 垃圾箱
advantage
disadvantage
cost
cost
cost
wooden
wood
plastic
takeaway
bin
二、短语速记(写出下列短语的英文)
1.充满  be full of 
2.关闭  close down 
3.贡献力量;起……的作用  play a part in 
4.……的底部  the bottom of 
5.把……变成  turn...into 
6.砍倒;削减  cut down 
7.产生影响  make a difference 
8.引起;导致  lead to 
be full of
close down
play a part in
the bottom of
turn...into
cut down
make a difference
lead to
三、句子速译(把下列句子翻译成汉语)
1.We are trying to save the earth.
 我们正在尽力挽救地球。 
2.Even the bottom of the river was full of rubbish.
 甚至河底都充满了垃圾。 
3.Everyone in this town should play a part in cleaning it up.
 这个镇里的每一个人都应该在清扫工作中尽一份力。 
我们正在尽力挽救地球。 
甚至河底都充满了垃圾。 
这个镇里的每一个人都应该在清扫工作中尽一份力。 
4.I used to be able to see stars in the sky.
 我过去常常能在天空中看到星星。 
我过去常常能在天空中看到星星。 
5.Our actions can make a difference and lead to a better future.
 我们的行动能起作用并能创造一个更美好的未来。 
我们的行动能起作用并能创造一个更美好的未来。 
头脑风暴
·导学建议·
课前让学生预习本课时的单词、短语,扫清语言障碍。
完成课本1a中的练习,根据图片区分污染类型,并对污染来源归类,列举的越多越好。
听力训练
一、1b听力训练
1.认真阅读表中信息,预测画线处的内容。
2.听第一遍1b录音,完成句子填写。
3.听第二遍1b录音,核对答案。
4.对话练习。再次播放录音,边听边跟读对话,然后全班分角色朗读对话,并两人一组完成1c任务。
二、2a,2b听力训练
1.听前活动。
·导学建议·
把学生分成四组,每组选定一个2a中所列的主题,让学生根据主题开展单词接力,每个人必须说出与前一个同学说的单词有关联的单词或者短语,看看哪一个组能在规定的时间说出最多的相关词汇。这样能有效地集中学生的注意力,唤醒学生脑海中与话题相关的知识储备,为听力做好准备。
例如:land pollution:rubbish,dirty,throw,clean up...
2.听录音,获取信息。
①听第一遍2a的录音,完成2a的活动,全班核对答案。
②观察2b活动的句子,对需要填写的内容进行预测。
  ◎学法指导:可以从整句意思和句法结构推断横线内应该填一个什么词性的单词。
③听第二遍录音,完成课本2b活动。
④听第三遍录音,纠正填写的内容。
对话训练
·导学建议·
让学生两人一组,分不同角色朗读对话。
1.听2b录音,跟读对话,注意模仿录音中的语音、语调。
2.学生两人一组,参考2c编对话并进行角色扮演。
3.完成2d活动。
Step 1.语境导入。请同学们思考下面的问题:
What are your ideas for solving the air pollution/waste pollution problem?
Step 2.快速阅读2d对话,找出其中谈及的环境问题。
 Air pollution and waste pollution. 
Air pollution and waste pollution. 
Step 3.再次阅读2d对话,找出关于空气污染和垃圾污染问题的解决办法,填写以下表格。
Pollution Ways to solve the problem
Air pollution  Take the bus or subway,ride a bike... 
Waste pollution  Bring a bag to go shopping,never use wooden chopsticks or plastic forks,throw rubbish in the bins,keep public places clean and beautiful... 
Take the bus or subway,ride a bike... 
Bring a bag to go shopping,never use
wooden chopsticks or plastic forks,throw
rubbish in the bins,keep public places clean
and beautiful... 
  Step 4.尝试在不看课本的情况下,完成对话填空。
Interviewer:Jason and Susan,what are your ideas for solving these problems?
Jason:Well,to  cut down  air pollution,we should take the bus or subway  instead of  driving.
Susan:Yeah,or ride a bike. There are other  advantages  of bike riding.It’s good for health and it doesn’t cost anything!
Interviewer:Great ideas! What about  waste pollution  ?
cut down
instead of
advantages
waste pollution
Susan:Mmm,I think simple things like bringing a bag to go shopping can help.I started doing that a year ago.
Jason:Me,too.Also,I never take  wooden  chopsticks or plastic forks when I buy  takeaway  food. I use the ones at home.
Susan:And remember to throw rubbish in the  bins  and keep public places clean and beautiful for everyone.
wooden
takeaway
bins
Interviewer:So together,our actions can  make a difference  and  lead to  a better future!
  ◎学法指导:在完成上面练习时尝试不看课本完成填空,重点记忆所填单词或短语。
make a
difference
lead to

It’s good for health and it doesn’t cost anything! 这对健康有好处,而且不花什么钱!  
◎用法总结:cost作动词,意为“花费”。指花费金钱,主语通常是物。cost的过去式和过去分词均为cost。例如:How much did the new computer cost?新电脑花了多少钱?
◎take,spend,pay和cost的辨析。 take,spend,pay和cost都可以表示“花费”,但用法各有不同。
take 多表示花费时间,常用于It takes sb.some time to do sth.在这一句型中,it作形式主语 It took them three years to build this road.他们用了三年时间修完了这条路。
spend 多表示花费时间或金钱,主语通常是人,常用于sb.spend(s) some time / money on sth.和sb.spend(s) some time / money (in) doing sth.两种句型 I spent two hours (in) doing this maths question./I spent two hours on this maths question. 做这道数学题花了我两个小时。
pay 多表示花费金钱,主语通常是人,常用于sb. pay(s) some money for sth.句型 I have to pay them 20 pounds for this room each month.我每个月必须要付20英镑的房租给他们。
cost 多表示花费金钱,主语通常是物,常用于sth.cost(s) (sb.) some money句型 The new dress cost Linda 80 yuan.这件新裙子花了Linda 80元。

根据句意,用take,spend,pay或cost的适当形式填空
1.That new car  cost  them lots of money.
2.Mona  spent  50 yuan on the books just now.
3.It usually  takes  me an hour to do my homework.
4.You should  spend  some time practicing your pronunciation.
5.My brother  paid  6,000 yuan for the new computer yesterday.
cost
spent
takes
spend
paid
Everyone in this town should play a part in cleaning it up. 这个镇上的每一个人都应该在清扫工作中尽一份力。  
◎用法总结:play a part in 意为“参与;在……方面起作用”,后接名词、代词或动词-ing形式。
◎知识拓展:play an active part in (doing) sth.意为“积极参与(做)某事”; play an important part in (doing) sth.意为“在(做)某事中发挥重要作用”。

英汉互译
1.教育可以在其中起作用。
 Education can play a part in it. 
2.我想积极参加学校活动。
 I want to play an active part in school activities. 
3.公共交通在我们的日常生活中发挥着重要作用。
 Public transportation plays an important part in our daily life. 
Education can play a part in it. 
I want to play an active part in school activities. 
 Public transportation plays an important part in our daily life. 
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.

新知学习
课堂小结
当堂检测
学习目标
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
学习目标
重点研讨
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
学习目标
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
课堂小结
当堂检测
学习目标
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
课堂小结
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
课堂小结
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
课堂小结
当堂检测
学习目标
重点研讨
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
课堂小结
当堂检测
学习目标
重点研讨
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
课堂小结
当堂检测
学习目标
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
课堂小结
当堂检测
学习目标
重点研讨
Exercise
What a fine day today!
Look! What are they doing
新知学习
课堂小结
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
学习目标
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
学习目标
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
学习目标
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
课堂小结
当堂检测
学习目标
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
课堂小结
当堂检测
学习目标
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