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(共26張PPT)
M12 Save our world
Unit 3 Language practice（第一課時）
Can you list more compound words
one new compound word
one word
one word
+
Do you know the meanings of these words
Observe carefully and pay attention to the words in red.
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. …but let’s take these simple steps today so that we will save the world for our grandsons and granddaughters tomorrow.
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。合成法是可以合成名詞、形容詞、副詞、代詞、動詞等。例如：afternoon, sportsman, blackboard, sportsperson, newspaper, airplane, classmate, grandfather等為合成名詞; kind-hearted, middle-aged, hard-working 等為合成形容詞; however, maybe, himself, everyone, nothing等為合成單詞。
構詞法
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。派生法要掌握常見的前綴和后綴及派生規律。
Reuse means “use again”.
Though pollution is heavy now, I don’t think it’s hopeless.
1) 常見前綴
前綴 含義 例詞
dis- 不 disagree, dislike
en- 使...處于某種狀態 enable, enrich
im-, in- 不 impossible, inexpensive
inter- 在…之間, 相互 international, interconnect
mis- 錯誤地 mislead, misunderstand
non- 不, 非 non-smoker, non-native
re- 再, 重復 rewrite, retell
un- 不 unable, unhappy
2) 常見后綴
后綴 功能 例詞
-er, -or 構成名詞 teacher, visitor
-ian musician
-ing building, painting
-ist artist, scientist
-ment agreement, government
-ness coldness, happiness
-th truth, warmth
-tion education, information
-ty activity, safety
后綴 功能 例詞
-able, -ible 構成形容詞 comfortable, enjoyable
-al international, national
-ful careful, helpful
-ive active, expensive
-less careless, helpless
-ly friendly, lovely
-ous dangerous, famous
-teen 構成數詞 eighteen, fifteen
-th fifteenth, fifth
-ty forty, sixty
-ly 構成副詞 badly, carefully
3) 派生規律
由一個詞根加上相應的詞綴可以派生出名詞、形容詞、副詞等，掌握派生規律對擴充詞匯有很大幫助。
interest 可以派生出：
— interesting
— interestingly
— interested
— uninterested
— uninteresting
help 可以派生出：
— helpful
— helpfully
— helpless
— helplessly
3. 轉化法
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。
3) 形容詞轉化為名詞
She was wearing a black dress.
她穿著一條黑色的裙子。
The girl in black looks very beautiful.
那個穿黑衣服的女孩看上去很漂亮。
reuse
pollution
hopeless
farmer
everyone
something
healthy
waste
harmful
recycle
grandson
granddaughter
compounds derivatives conversion
everyone something grandson granddaughter reuse pollution hopeless farmer healthy harmful recycle waste
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
collectable, usable, careful, hopeful, useful, wasteful, impossible, careless, hopeless, useless, reuse, unusual, unwanted
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 ____________
careful
collectable
hopeful
hopeless
impossible
6. not usual ____________
7. without any use ____________
8. use again ____________
9. not wanted ____________
10. making a lot of waste ____________
unusual
useless
reuse
unwanted
wasteful
Complete the sentences with the words in the box.
hopeful impossible reuse unhealthy wasteful
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 _________.
unhealthy
wasteful
reuse
impossible
hopeful
Complete the table.
Noun Verb Adjective Adverb
useful/useless
hope hopefully/ hopelessly
pollution —
water — —
waste
— — usually/unusually
use
use
usefully/uselessly
hope
hopeful/hopeless
pollute
polluted
water
waste
wasteful/wasted
wastefully
usual/ unusual
3. Do not use so much water. It is very _________.
4. To keep the flowers growing, you need to _______ them once a day.
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.
polluted
usual
wasteful
water
Complete the sentences.
A lunchbox is a box that you keep your lunch in.
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.
postcard
classroom
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.
storybook
blackboard
Look at the pictures and answer the questions.
What kinds of things can be recycled
old clothes
old mops
envelopes,
old notebooks, boxes,
paper cups
bottles,
jars,
broken drinking glasses
2. How can these things be reused
Recycled paper can be used for notebooks,
tickets or writing paper.
3. How does this help the environment
For example, we save paper so we don’t need to cut more trees to make paper. We can get more fresh air so air pollution can be reduced.
4. Have you ever recycled or used things that can be recycled How
Everyone can have his or her ways of recycling.
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 (1) ______________ 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 (2) ____________ things if I don’t want them any more. I (3) _________ the lights when I leave a room. Don’t tell me I shouldn’t travel by plane any more!
worried about
throw away
turn off
be good for throw away turn off worry about
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 (4) ___________ the environment. In this way, we can reduce the harm of pollution.
are good for
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!
Homework
You must do:
Complete Exercise A and B
Find more imformation about word formation on
You can choose to do:
Complete Exercise C
Find more imformation about environment protection

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