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1、 Reuse means “use again”.Though pollution is heavy now, I dont think its hopeless.Make a 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 wastecollectable,
2、usable, careful, hopeful, useful, wasteful, impossible, careless, hopeless, useless, reuse, unusual, unwantedNow work in groups. Play the guessing game English for Fun.1. full of care _ 2. can be collected _ 3. full of hope _ 4. without any hope _ 5. not possible _careful collectable hopeful hopeles
3、s impossible6. not usual _ 7. without any use _ 8. use again _ 9. not wanted _ 10. making a lot of waste _unusual uselessreuse unwantedwastefulSometimes 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 renewabl
4、e = can be new again1. 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, n
5、othing, 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, enrichim-, in- 不impossible, impatient, inexpensive inter-在之间, 相 互international, interconnect前缀含义例词 mis-错误地mislead, misunderstand non-不
6、, 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 -ianmusician -ingbuilding, painting, shopping, meaning -istartist, scientist后缀功能例词 -ment构成名词agreement, government -nesscoldness, happiness, illness -thtruth, warmth -t
7、ioncompetition, education, information, invitation -tyactivity, safety后缀功能例词 -able, -ible构成 形容词comfortable, eatable, enjoyable, possible, -alenvironmental, international, national, traditional -fulcareful, helpful, useful -iveactive, expensive -lesscareless, helpless, homeless, useless后缀功能例词 -ly构成 形
8、容词friendly, lovely, monthly, weekly -ousdangerous, famous -teen构成数词eighteen, fifteen, seventeen -thfifteenth, fifth, fortieth, seventh -tyforty, 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：uninterestingi
9、nterest interesting interestinglyinterested uninterested由 help 可以派生出：helpless helplessly help helpful helpfully 由 able 可以派生出：enable able unableabilitydisable3. 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 Lets talk about it more. 咱们再谈谈这件事吧。 I think wed better finish the talk now. 我想我们最好现
10、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。Complete the sentences with the words in the box.hopeful impossible reuse unheal
11、thy wasteful 1. Polluted water is _. 2. It is _ to throw so much food away.unhealthy wasteful3. 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 _.reuse impossiblehope
12、fulComplete the table. NounVerbAdjectiveAdverb useful/uselesshopehopefully / hopelessly pollution water waste usually/ unusuallyuseuseusefully/ uselesslyhopehopeful/hopelesspollutepolluted/unpolluted water wastewasteful/wastedwastefullyusual/ unusualComplete the sentences with the correct form of th
13、e 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.pollutedusual3. Do not use so much water. It is very _. 4. To keep the flowers growing, you need to _
14、 them once a day.wastefulwaterComplete 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.postcardclassroom3. 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.storybookblackboardLook at the pictures and answer the questions.1. 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
