1、Module 6 Save our world,Unit 3 Language in use,在一个单词前或后加上一个词缀，就可以构成一个新词。 根据词缀的位置，分为前缀和后缀两种。掌握一些常见的词缀，对单词的记忆和理解有很大的帮助。比如：我们学会care, 就能掌握careful, careless, carefully, carelessly。下面我们来学习几个常见的前、后缀：,Grammar,1. 表示否定意义 “无，不”的前缀：,impolite, impossible,un- in- dis- im- il-,unfair, unhappy,inactive, inhuman, in
2、direct,disagree, disappear,illegal,前缀：,2. 表示程度、大小的前缀：,super-over- mini- under-,superstar, supermarket, superman, superpower,overhead, overeat, overuse,minibus, miniskirt, minicar,underground, underdevelop,前缀：,3. 表示 “再”的前缀：,re-,rewrite, reuse, recycle,前缀：,4. 表示 “向，背”的前缀：,pro-anti-,pro-Chinese, pro-Am
3、erican,anti-war(反战), anti-pollution,5. 表示 “整个、完全”意思的前缀：,al- 表示“完整，完全” ：alone, almost, over-表示“完全，全” ：overall,overflow(充满),前缀：,able表示“可能，易于，适合于”，构成形容词，如：renewable, eatable(可吃的)，lovable(可爱的)， comfortable, movable(可移动的),后缀：,常见的后缀：,2. ful 表示“充满.的，具有.性质的”，构成形容词，如：helpful, hopeful, powerful ,useful, caref
4、ul, beautiful,后缀：,3. less 与-ful 相反，表示“少的，不足的”，构成形容词，如：helpless, hopeless, powerless, useless, careless,1.动词变名词：,-ation -ment -al -ee -er -or,satisfaction, education, realization,development, movement,arrival, refusal,trainee, employee,teacher, worker,visitor, sailor,让我们来看一些不改变词根的基本意义，而是改变了词性的后缀。,2.形
5、容词变名词：,-ness -ity -ism,happiness, meanness, carelessness,ability, possibility,Marxism, criticism,3. 名词、形容词变动词：,-ify -ize -en,beautify, simplify,realize,quicken, widen, sharpen,4.名词变形容词：,-y -ish -some -ous -ful,windy, rainy, sandy,foolish, feverish,handsome, troublesome,dangerous, humorous,helpful, c
6、areful, peaceful,We can easily find such scenes everywhere in big cities.,People is trying to deal with rubbish now.,1. Make new words. Join the words in Box A with the parts of words in Box B.,full of care _,A care collect done hope possible usual used wanted waste,B -able -ful im- -less re- un-,ca
7、reful,1 can be collected_ 2 not done_ 3 full of hope_ 4 without any hope_ 5 not possible_ 6 not usual_ 7 not used_ 8 used again_ 9 not wanted_ 10 making a lot of waste_,collectable,undone,hopeful,hopeless,impossible,unusual,unused,reused,unwanted,wasteful,2. Match the underlined words with their mea
8、nings.,1 Polluted water is not healthy. 2 Its something we can use again. 3 The water in the river was very dirty. 4 Its not true that we dont listen to students. 5 It was not possible to clean up the whole river. 6 The people on the mountain top were not comfortable.,a reusable b uncomfortable c un
9、healthy d unclean e impossible f untrue,c,a,d,f,e,b,3. Complete the table.,electricity,electric,energy,energetic,environmental,hopeless,hope,hope,pollution,polluted,serious,seriously,nation,nationally,unusual,environmentally,waste,worriedly,wastefully,wasteful,worried,worry,4. Complete the sentences
10、 with the correct form of the words in Activity 3.,1 They are working very_ to reduce waste. 2 The situation is_. We cant do anything to make it better. 3 The factory_ the river, and the fish died. 4 We dont often walk in the country. Its a(n)_ activity for us. 5 Dont_. Everything will be all right.
11、 6 Dont use so much water. Its very_.,energetically,hopeless,polluted,unusual,worry,wasteful,5. Work in pairs and talk about the picture.,1 What kind of things can be recycled? 2 How can these things be reused? 3 How does this help the environment? 4 Do you ever recycle, or use recycled material? Ho
12、w?,6. Read the ideas on protecting the environment.Put them in the correct column in the table.,a Dont buy anything made from endangered animals or plants. b Glass bottles and newspapers can be taken to recycling centers and reused. c Dont boil more water than necessary. d Dont take new plastic bags
13、 from the shop reuse your old ones. e Turn off lights when you dont need them. f Use a bicycle or walk instead of using the car.,Now listen and check.,c,a,d,f,e,b,7. Listen again and answer the questions.,1 Why should you reuse plastic bags?2 Name two advantages of using a bicycle or walking instead
14、 of using a car.,Because they are hard to recycle.,There is no pollution and its a good kind of exercise.,3 Why did some animals die out?4 How can we stop some people trying to kill or sell endangered animals and plants?,Because people have cut down a lot of trees and polluted the rivers.,Never buy
15、anything made from endangered animals.,8. Work in pairs. Discuss the question.,Which of the ideas do you think you would find easiest / most difficult to use in your everyday life? Why?,9. Complete the conversation with the correct form of the phrases in the box.,Mike: I hear youre off to the Caribb
16、ean for a holiday! Lucky you! But arent you(1)_the dangers of such long flights on the environmentKen: Why should I be worried? Mike: Planes cause a lot of pollution.,be good for hear of look after throw away turn off worry about,worried about,Ken: I know, but what can I do about it? I already try m
17、y best to protect theenvironment. I recycle, I dont just (2)_things if I dont wantthem any more. I (3)_the lights when I leave a room. Dont tellme we shouldnt travel by plane any more. Mike: No, of course not. But we can do something topr0tect the envir0nment.Have you (4)_ ?,throw away,turn off,hear
18、d of,Its an environmental group.It helps to (5)_trees. By planting more trees, we can help keep the air clean, because trees (6) _the environment. In this way, we can reduce the dangers of pollution.Ken: Good! So I can enjoy my holiday, and When I come back, Ill plant some trees! Mike: Thats the ide
19、a! Maybe we can all join in and start a small forest!,look after,are good for,Module task,Discussing what you can do about pollution,Work in groups. Decide what type of pollution you want to talk about.,Choose something that is very important to you. It could be water pollution, air pollution, waste
20、, cutting down forests, etc. Find out a bit more information about your subject. Look it up on the website or in books.,Discuss your topic.,Take it in turns saying what you think about the problem and What can be done. Listen carefully to what the others say. If you agree with what theyve said, say “I agree”, “Thats true” or “Thats a good point”; if you dont agree, say “Im sorry but I disagree. I think that .” Make a summary of what you have said and tell the class.,Goodbye!,
