Unit 3 Language in useModule 12 Save our worldLanguage practiceReuse means “use again”.Though pollution is heavy now, I don’t think it’s hopeless.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.1-able -ful im- -less re- un-ABcare collect hope possible use usual wanted wasteNow 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 _________ careful English for Funcollectablehopefulhopeless5 not possible __________ 6 not usual __________7 without any use __________8 use again __________9 not wanted __________ 10 making a lot of waste __________uselessimpossiblewastefulunusualreuseunwantedLearning to learnSometimes 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 berenewable=can be new again构词法：合成法 派生法转化法Grammar一、合成法 将两个或两个以上独立且语义不同的的单词合在一起构成新词的方法叫做合成法。如：afternoon 、 kind-hearted 、 maybe 等等。掌握合成法有助于我们理解和记忆更多单词。 在一个单词前或后加上一个词缀，就可以构成一个新词，这种方法叫做派生法。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：二、派生法1. 表示否定意义 “无，不”的前缀：impatient, impossibleun -in -dis -im -non-unable, unhappyinexpensive, indecision disagree, dislike non-smoker前缀：2. 表示 “再”的前缀：re-rewrite, reuse, recycle3. 表示 “错误地”的前缀：mis - mislead , misunderstand4. 表示 “在……之间，相互”意思的前缀：inter- 表示“在……之间，相互”： Internet后缀：1. –able 表示“可能，易于，适合...
