《Language in use》Save our world PPT课件2

Objective:

To summarize and consolidate the rules of word building

Observe

Observe the following sentences carefully. They are all from this module.

1. Reuse means“use again”.

2. Though pollution is heavy now, I don’t think it’s hopeless.

3. If the rivers are polluted, farmers can’t use the water for their crops.

4. If everyone starts to do something, the world will be saved.

5. We all need a healthy environment, but we produce waste every day, and it is harmful to our environment.

6. Do not waste things.

7. Repeat these three words daily: reduce, reuse and recycle.

8. Before you buy something new, think whether it is really necessary because maybe old one is just as good!

9. …but let’s take these simple steps today so that we will save the world for our grandsons and granddaughters tomorrow.

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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称作合成法。

合成名词  afternoon, sportsman, blackboard, newspaper, airplane, classmate…

合成形容词  kind-hearted, middle-aged, hard-working…

合成副词  however, maybe…

合成代词  himself, everyone, nothing…

合成动词  overlook…

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称作派生法。

dis-   不  disagree, dislike

en-  使……处在某种状态  enable, enrich

im-, in-   不  impossible, impatient, inexpensive

inter-  在……之间  international, interconnect

mis-  错误的  mislead, misunderstand

non-  不，非  non-smoker, non-native

re-  再，重复  rewrite, retell

un-  不  unable, unhappy, unpopular

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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 _________.

Complete the sentences with the correct form of the words in Activity 3.

She was ______ that her new job would make her more successful.

1. 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.

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I. 从方框中选择适当的单词并用其正确形式填空。

correct   energy    eat    possible

appear     help    success    care

1. Both of the books were ________ to her and she couldn’t decide which one to buy.

2. How ________ of John to break the cup!

3. The meat has a strange smell. I’m afraid it’s hardly _______.

4. Tom is an _________ boy and it seems that he never gets tired.

5. I’m afraid that it’s ________ for us to get there before eight.

6. The sun _________ behind the clouds and it began to rain.

7. I’m sorry to say your answer is ________. Please try again.

8. It’s not easy to become a _________ actor.

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Ⅱ.完成下列同义句。

1. It’s not polite to speak to others with your mouth full of food.

It’s _________ to speak to others with your mouth full of food.

2. The teacher asked him to write the composition again.

The teacher asked him to _________ the composition.

3. He’s not popular with some of the neighbors.

He’s _________ with some of the neighbors.

4. I hate sweet food. Especially, I don’t like eating cake.

I hate sweet food. Especially, I _________ eating cake.

5. Hamburgers, candy and ice cream aren’t healthy food.

Hamburgers, candy and ice cream are ________ food.

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Homework

1. Search for more information about pollution. Make an oral presentation to your class.

2. Finish the exercises in Learning English.

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