Module 12 Save our world Unit 3 Language in use教案

Module 12 Save our world
Unit 3 Language in use
【教学目标】
To summarise and consolidate the rules of word building.
【教学过程】
Step 1 Language practice
Reuse means “use again”.
Though pollution is heavy now, I don’t think it’s hopeless.
Step 2构词法
1. 合成法
将两个或两个以上独立且语义不同的单词合在一起构成新词的方法叫做合成法。合成法是一种比较灵活的构词方法，可以合成名词、形容词、副词、代词、动词等。例如：afternoon, sportsman, blackboard, sportsperson, newspaper,
airplane, classmate, grandfather 等就是通过合成构词法构成的名词；kind-hearted, middle-aged, hard-working 等为合成形容词；however, maybe, himself, everyone, nothing, overlook 等也都是通过合成法构成的单词。
2. 派生法
通过在词根前面加前缀或在词根后面加后缀构成一个新词的方法叫作派生法。要通过派生法理解和记忆单词, 我们需要掌握常见的前缀和后缀及派生规律。
(1) 常见前缀
前缀 含义 例词
dis- 不 disagree, dislike
en- 使……处于某种状态 enable, enrich
im-, in- 不 impossible, impatient, inexpensive
inter- 在……之间, 相互 international, interconnect
mis- 错误地 mislead, misunderstand
non- 不, 非 non-smoker, non-native
re- 再, 重复 rewrite, retell
un- 不 unable, unhappy, unpopular
(2) 常见后缀
后缀 功能 例词
-er, -or 构成名词 teacher, worker, visitor
-ian musician
-ing building, painting, shopping, meaning
-ist artist, scientist
-ment agreement, government
-ness coldness, happiness, illness
-th truth, warmth
-tion competition, education, information, invitation
-ty activity, safety
-ble, ible 构成形容词 comfortable, eatable, enjoyable, possible, probable
-al environmental, international, national, traditional
-ful careful, helpful, useful
-ive active, expensive
-less careless, helpless, homeless, useless
-ly friendly, lovely, monthly, weekly
-ous dangerous, famous
-teen 构成数词 eighteen, fifteen, seventeen
-th fifteenth, fifth, fortieth, seventh
-ty forty, sixty, twenty
-ly 构成副词 badly, carefully, carelessly, happily, quickly
(3) 派生规律
由一个词根加上相应的词缀可以派生出名词、形容词、副词等，掌握派生规律对扩充词汇有很大帮助。例如：
由 interest 可以派生出：
uninteresting
interest — interesting — interestingly
interested — uninterested
由 help 可以派生出：
helpless — helplessly
help — helpful — helpfully
由 able 可以派生出：
enable
able unable
ability
disable
3. 转化法
英语构词法中把一种词性转化为另一种词性而词形不变的方法称作转化法。常见的转化有：
(1) 动词转化为名词
— Let’s talk about it more. 咱们再谈谈这件事吧。
— I think we’d better finish the talk now. 我想我们最好现在结束谈话。
(2) 名词转化为动词
She gave me a cup of water. 她给了我一杯水。
You should water the flowers twice a day.
你应该每天给这些花浇两次水。
(3) 形容词转化为名词
She was wearing a black dress.
她穿着一条黑色的裙子。
The girl in black looks very beautiful.
那个穿黑衣服的女孩看上去很漂亮。
Step 3 Make new words. Join the parts of words in Box A with the words in Box B. You need to use some of the parts more than once.
A –able -ful im- -less re- un-
B care collect hope possible use usual wanted waste
Now work in groups. Play the guessing game English for Fun.
English for Fun
full of care ____________
2. can be collected ____________
3. full of hope ____________
4. without any hope ____________
5. not possible ____________
6. not usual ____________
7. without any use ____________
8. use again ____________
9. not wanted ____________
10. making a lot of waste ____________
Step 4 Learning to learn
Sometimes if you know the meaning of the parts of a word, you can work out the meaning of the whole word.
re + new + able;
re = again,
able = can be
renewable = can be new again
Step 5 Complete the sentences with the words in the box.
hopeful impossible reuse unhealthy wasteful
1. Polluted water is ____________.
2. It is _________ to throw so much food away.
3. If you look after things well, you may ________ some of them later.
4. It is ___________ to clean up the whole river in such a short time.
5. If we pay attention to pollution now, the future will be __________.
Step 6 Complete the table.
Noun Verb Adjective Adverb
useful/useless
hope hopefully / hopelessly
pollution ——
water —— ——
waste
—— —— usually/unusually
Step 7 Complete the sentences with the correct form of the words in Activity 3.
She was hopeful that her new job would make her more successful.
The factory ___________ the river, and the fish died.
2. We often walk in the countryside. It is a(n) _______ activity for us.
3. Do not use so much water. It is very __________.
4. To keep the flowers growing, you need to _________ them once a day.
Step 8 Complete the sentences.
A lunchbox is a box that you keep your lunch in.
1. A ___________ is a card that you write on one side of and send to someone by post.
2. A ___________ is a room where you have classes at school.
3. A ___________ is a book that has one or more stories for children.
4. A ____________ is a black board that is used at school for writing on with chalk.
Step 9 Work in pairs
Look at the pictures and answer the questions.
What kinds of things can be recycled
2. How can these things be reused
3. How does this help the environment
4. Have you ever recycled or used things that can be recycled How
Step 10 Complete the conversation with the correct form of the expressions in the box.
be good for throw away turn off worry about
Mike: I hear you are off to the Caribbean for a holiday! Lucky you! But aren’t you _____________ the pollution that such long plane journey may cause for the environment
Ken: I know, but what can I do about it I’ve already tried my best to protect the environment. I recycle. I don’t ____________ things if I don’t want them any more. I __________ the lights when I leave a room. Don’t tell me I shouldn’t travel by plane any more!
Mike: No, of course not. But we can do more to protect the environment. For example, we can help keep the air clean by planting trees. Trees ______________ the environment. In this way, we can reduce the harm of pollution.
Ken: Good! So I can enjoy my holiday, and when I come back, I’ll plant some trees!
Mike: That’s the idea! Maybe we can all join in and start a small forest!
Step 11 Listening
Listen and check (√) the true sentences.
Do not throw away things made of glass, plastic and paper, but recycle them when possible.
b) Take a bag when you go shopping.
c) It is OK to throw used things away. Looking after them takes a lot of time.
d) Turn off lights when you do not need them.
e) Ride a bike or walk, and do not often drive your car.
f) Paper cups and bottled drinks make our life easier. We can use them as much as possible.
Step 12 Listen again and complete the table.
Advice Reasons
1. Don’t throw away things made of _________, but _______ them. Throwing things away is wasteful.
2. __________ your plastic bags when you can and __________ with you when you go shopping. Plastic bags __________ recycle.
3. Use less electricity and oil to _________. 4. Don’t leave lights on and __________. 5. ________ and do not often drive your car. Producing electricity and using oil may cause ___________.
Step 13 Around the world
Earth Hour
Read the passage and answer the questions.
When is Earth Hour held each year
Why do people switch off the lights during Earth Hour
When and where was the first Earth Hour held
Which city take part in the event today
Step 14 Module task: Discussing what you can do about pollution
Work in groups. Decide what kind of pollution you want to talk about.
Choose a subject that you care about the most. It could be water pollution, air pollution, etc.
Find out more information about your subject. Look it up on a website or in a book.
Step 15 Discussion
Discuss your subject.
Take turns to say what you think about the problems and what can be done.
Listen to what others say. If you agree with what they have said, say “I agree”. “That’s true” or “That’s a good point”; if you do not agree with what someone says, say “I’m sorry, but I don’t agree. I think that …”
Present your group ideas to the whole class.
Step 16 Exercises
Ⅰ. 根据语境用括号内所给单词的适当形式填空。
1. —You won't go to the party
—Oh, you _______(understand) me. I didn't mean that.
2. We should pay more attention to our _______(safe) when we play by the seaside.
3. The old man needs an _______(operate) at once.
4. It's _______(relax) to lie in bed and listen to some light music.
5. Tom failed in the exam because of his _______(care).
Ⅱ. 写出下列句子的同义句。
1. Too much chocolate harms your teeth.
_________________________________
2. Everything is possible if you try your best.
_________________________________
3. The little girl isn't able to swim in the sea.
_________________________________
4. There was a flood because it rained heavily.
_________________________________
5. It's too dark to see anything in the room.
_________________________________
Ⅲ. 根据材料内容，从方框中选择恰当的单词填空，使材料意思完整、通顺，有的需要变换形式，每词限用一次。
throw, sell, decide, two, reduce, against, health, little, change, careful
People sometimes produce too much waste, and it pollutes our environment greatly. Our (1)_______ on what to do with the waste affect the environment a lot. No matter what scientists say about moving to Mars, the earth is the only planet that we can live on. So we have to protect it (2)_______ pollution.
In order to build a (3)_______ environment, please remember the three Rs.
The first R is to reduce waste. The most effective (有效的) way (4)_______ waste is not to produce it in the first place. If there is (5)_______ waste, then there is less pollution. Before you buy something, think it (6)_______ whether it is needed or friendly to the environment.
The second R is to reuse things. Instead of (7)_______ them away, why don't you use them again
And finally, it is to recycle. Through recycling the waste things (8)_______ into new ones. They are given a (9)_______ life. I've recently cleared out my wardrobe (衣柜) and (10)_______ some clothes that I no longer like. The money from selling them goes towards helping people in poor areas, so it's a win-win for all.
Step 17 Homework
假如下周英语角活动的主题是How to protect the environment，请你根据下面表格里的提示内容写一篇80词左右的英语短文，为英语角活动做准备。
个人 政府
1. 步行或坐公交车出行 2. 自带购物袋购物 3. 少用空调(air conditioner) 1. 鼓励人们热爱环境 2. 阻止工厂的污染 3. 阻止河流被污染
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