高中定語從句課件

　　Teaching aims:

　　知識目標：To master some words and expressions about save our world:

　　factory, pollute, recycle, waste, enemy, crop, kill, oil, less, such as, hopeless…

　　能力目標：

　　1.To understand passages about pollution .

　　2. to learn to say why we need to save the world and how to be green.

　　New words

　　pollute v. 污染

　　factory n. 制造廠; 工廠

　　waste n. 廢料; 廢棄物

　　recycle v. 回收利用, 再使用(廢品)

　　crop n. 莊稼; 作物

　　enemy n. 敵人; 仇人

　　oil n. 石油

　　kill v. 殺死; 弄死

　　What causes pollution ?

　　1.Pollution from factories spreads over cities and villages.If the rivers are polluted, farmers can’t use them to water their crops .

　　2.In some places, pollution from factories spreads over cities and villages

　　3.The cars on the roads use so much oil and cause pollution .

　　What can students do ?

　　1.every class collects waste which can be recycled or used again .Then the school sells the waste to help students.

　　2. Order food that you can finish.

　　3. Use less electricity at home.

　　4. Learn ways to recycle rubbish.

　　5. Divide rubbish into different groups.

　　6. Use paper cups and paper bags.

　　7.Go to school on foot or by bike.

　　8. Do not throw away things made of glass, plastic and paper, but recycle them when possible.

　　9. Turn off lights when you do not need them.

　　10. Take a bag when you go shopping in stead of asking for a plastic bag.

　　11. Use things for as long as possible.

　　language points

　　1. We throw tons of rubbish away each year, and we have to make a change.

　　ton n. 噸

　　tons of 許多, 很多

　　e.g 我們為今晚的聚會買了大量飲料。

　　We’ve bought tons of drinks for the party tonight.

　　throw away 扔掉; 丟棄

　　e.g. When are you going to throw away those old magazines?

　　你打算什么時候扔掉那些舊雜志.

　　他已經失去了一個良好的機會。

　　He has thrown away a good chance

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

　　repeat v. 重說; 重新做

　　前綴“re-”, 意思是“再, 重復”

　　e.g. I repeated after the teacher word by word.

　　我跟著老師一個字一個字地讀。

　　3. Although it takes energy to change things into something else, it is better than throwing things away or burning them.

　　change … into …

　　把……變成……

　　e.g. You can’t change iron into gold.

　　你無法把鐵變成金子。

　　4. We cannot hope for rapid change, but let’s take these simple steps today …

　　take steps 采取措施

　　e.g.我們需要采取一些措施了減少污染。

　　We need to take some steps to reduce pollution

　　構詞法

　　1.合成法

　　將兩個或兩個以上獨立且語義不同的單詞合在一起構成新詞的方法叫做合成法。合成法是一種比較靈活的構詞方法，可以合成名詞、形容詞、副詞、代詞、動詞等。例如：afternoon, sportsman, blackboard, sportsperson, newspaper,

　　2. 派生法

　　通過在詞根前面加前綴或在詞根后面加后綴構成一個新詞的方法叫作派生法。要通過派生法理解和記憶單詞, 我們需要掌握常見的前綴和后綴及派生規律。

　　3. 轉化法

　　英語構詞法中把一種詞性轉化為另一種詞性而詞形不變的方法稱作轉化法。常見的轉化有：

　　(1) 動詞轉化為名詞

　　— Let’s talk about it more.

　　咱們再談談這件事吧。

　　— I think we’d better finish the talk now.

　　我想我們最好現在結束談話。

　　(2) 名詞轉化為動詞

　　She gave me a cup of water.

　　她給了我一杯水。

　　You should water the flowers twice a day.

　　你應該每天給這些花澆兩次水。

　　Exercises

　　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 hopeful 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.

　　Listening

　　Listen and check (√) the true sentences.

　　1. It is OK to throw used things away. Looking after them takes a lot of time.

　　2. Do not throw away things made of glass, plastic and paper, but recycle them when possible.

　　3. Take a bag when you go shopping.

　　Discussion

　　Discuss your subject.

　　Take turns to say what you think about the problem and what can be done.

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