UNIT8 Lesson 44 教学课件--冀教版初中英语八年级下

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Lesson 44 Environment Clubs
UNIT 8 Save Our World
学 习 目 标
掌握单词：least,pollute,waste, shut
接触单词：reduce, reusable , skip , packaging , leaky , litre , sink,
electricity
短语和句型：throw away; neither... nor...; shut down
How much garbage do you throw away after lunch
1
3
能读懂并说出减少污染保护环境的有效办法。
掌握及了解有关环保的单词和短语
2
课 堂 导 入
Lead in
What are they doing
Do you think the characters in the pictures are correct Why or why not What should we do
least /li st/
pollute /p lu t/
waste /we st/
shut / t/
adj. & adv. 最少的(地)；最小的(地)
n. 最少量；最小物
v. 污染；弄脏
v. & n. 浪费
v. 关上；合上
New Words
What do you do when you see somebody throwing garbage on the ground
Does your school have an environment club
THINK ABOUT IT
Listen and choose their activities.
No-garbage lunches
No-garbage schoolyard
Save water
Bring your own shopping bag
No smoking in public
Save electricity
No-car days
Listening
Read the lesson and answer the questions.
1. Why do many students join environment clubs in North America？
Because they want to reduce pollution and protect the environment.
2. Why do the students take their own bags when they go shopping？
Because it's a good way to reduce packaging.
Reading
3. How do the students in an environment club save water？How do they save electricity？
　They fix leaky toilets and sinks. Turn off the lights when they leave a room. Turn off televisions and shut down computers when they are not using them.
1. According to the reading, what things do North American students do to stop pollution or to make less pollution
(Have no-garbage lunches! Have no-car days! Turn off the water!)
2. What have you done at school to stop pollution
3. What can you do to make less pollution
Discussion
Fill in the blanks with the correct forms of the words in the box.
waste least nobody shut pollute
The soap factory ______________ the drinking water in this area.
Students should not _____ paper.
_______ knows when life on the earth started.
He who talks the most knows the _____.
I couldn’t ____ the window because it was stuck.
polluted/pollutes
waste
Nobody
least
shut
Practice
Read the passage and fill in the blanks.
In some countries of the world, people have started to reduce the amount of garbage they make. How First, they buy ______ things. They try to buy only what they really need. When you buy fewer things, you _____ away fewer things. Second, they reuse things.
fewer
throw
Retell
They use things, and then they use them again! Third, they recycle things. They make old things into new things. People call these the “three Rs”: reduce, _____ and ______. The three Rs help us remember that ___________________ is a problem.
reuse
recycle
garbage/pollution
Suppose your school's environment club wants to make a poster about littering and recycling. Can you make one？Here's an example.
Practice
Stop Pollution！
We have a nice, clean schoolyard. Let's keep it this way.
Don't litter！
Always put your garbage in a garbage can.
Never throw it on the ground.
Recycle！
Stop and think before you throw something out：
Can I use this again？
Can this be recycled？
Together，we can help keep our world clean！
Language points
1. In an environment club，students work together to reduce pollution and protect the environment.
reduce v．减少。其反义词为increase(增加)。常用短语：reduce to减少到……；reduce by减少了……
例：The number of the students has reduced to 200
this year.
今年的学生数量已减少到了两百人。
2.How much garbage do you throw away after lunch？　　
throw away丢掉，扔掉。它相当于throw out/throw off。该短语是动副型短语，当宾语是代词时，要放在throw与away之间；当宾语是名词时，置于throw与away之间或away之后均可。
例：Don't throw away the old bottles. They are still
useful.
不要扔掉这些旧瓶子。它们还有用。
3.Environment clubs encourage students to bring their lunches in reusable bags and dishes.　　
encourage sb.to do sth.鼓励某人做某事。其中，动词不定式作宾语补足语。
例：My teacher always encourages me to work hard.
我的老师总是鼓励我努力学习。
4. The class with the least garbage gets a prize.　　
least是little的最高级形式，意为“最少”，修饰不可数名词。最高级前面通常要用定冠词the。
例：Tom drank the least milk among the three boys. 这三个男孩中，汤姆喝的牛奶最少。
5．It's a good way to reduce packaging.
该句中to reduce packaging是动词不定式短语作后置定语，修饰way。此句可转化为一个含定语从句的复合句：It's a good way (that) you reduce packaging.
way在此作 “方式、方法” 讲，其后可接动词不定式(短语)、of短语及that/in which引导的从句作定语，that可省略。
例：It's a good way to practice spoken English.＝It's a good way of practicing spoken English.＝It's a good way(that)you practice spoken English.那是一个练习英语口语的好方法。
6．Did you know that a leaky toilet can waste 20 to 40 litres of water an hour？
waste v．浪费。常构成固定搭配 waste water/electricity/oil等。其反义词为save(节约，节省)。
例：The naughty boy wasted much money.
那个淘气的男孩浪费了很多钱。
7．Turn off the television and shut down the computer when you are not using them.
(1)【辨析】turn off，turn on，turn up与turn down
turn off 意为“关掉，关闭”，一般指关闭电源、水等，后面常接电器、仪器等。
turn on 意为“打开”，一般指打开电源、水等，后面常接电器、仪器等。
turn up 调大电器等的频率、音量等。
turn down 调小电器等的频率、音量等。
Please turn off the radio. My grandma is sleeping.
请关掉收音机，我的奶奶正在睡觉。
Could you please help me turn on the TV？
你能帮我打开电视吗？
I can't hear clearly.Please turn up the MP3.
我听不清楚。请调大MP3的音量。
He turned down the radio.
他调小了收音机的音量。
(2)shut down也可意为“关闭;停下”。它强调机器等停止运转、关闭窗户等，也可指关闭公司、工厂、店铺等。
例：The restaurant shut down last year.
这家饭店去年倒闭了。
But the company shut down in 1995.
但这家公司在1995年关闭了。
1. Learn some new words and expressions.
2. Be able to understand this text.
3. Call in people to work together to make our environment clean.
Sum up
课 堂 达 标
I.根据句意及首字母或汉语提示写出单词。
1．Chemical wastes _________(污染) the rivers and streams.
2．You should not __________(浪费)food when many people are hungry.
3．We should take ________(可重复利用的) bags for shopping.
4．Mr.Smith can drink five _____ (公升) of beer.
5．It _____ (减少)the risks of heart disease.
pollute
waste
reusable
litres
reduces
Ⅱ. 单项选择
1.How can we buy the most things with _______ money
A.little B.less C. least D. the least
2.You should_______ the computer when you're not using it.
A.turn on B.shut down C.cut down D. put on
D
B
Ⅲ. 根据汉语意思完成句子，每空一词。
1. forget, off, lights, don't, the, turn, to
____________________________________________________!
2. walk,days, people,no-car,to,on, work
____________________________________________________.
3. much, garbage, do, how, people away, throw, every,
day
____________________________________________________
4. our, it's, to, the, duty, environment, protect
____________________________________________________.
5. to, mother, encourages, work, often, me, hard
____________________________________________________.
Don' 't forget to turn off the lights
People walk to work on no-car days
How much garbage do people throw away every day
It's our duty to protect the environment
Mother often encourages me to work hard
1. Finish the exercises of Lesson 44.
2. Preview next lesson.
3. According to the text, think about the measures to protect the environment and write down your answer.
Homework
Thank you !