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课件网) Module 12 Unit 3 Language in use 外研版九年级上册 Learning objectives 1.To review the key words, phrases, and sentences of M12. 2. Be able to guess the composition, derivation and transformation of word meanings related to the learned words in a positive/negative way. 3. Have a deep understanding of the existing pollution problems in the world, and actively put forward suggestions to solve the pollution problems. Lead in drop the litter into the river stop the factory from… Collect the waste books and … What should we do to protect the environment turn off the tap waste food recycle the second-hands Lead in 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。 Presentation 合成名词 afternoon, sportsman, blackboard, newspaper, airplane, classmate… 合成形容词 kind-hearted, middle-aged, hard-working… 合成副词 however, maybe… 合成代词 himself, everyone, nothing… 合成动词 overlook… Presentation 二、派生法 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： Presentation 1. 表示否定意义 “无，不”的前缀： impatient, impossible un - in - dis - im - non- unable, unhappy inexpensive, indecision disagree, dislike non-smoker 前缀： Presentation 2. 表示 “再”的前缀： re- rewrite, reuse, recycle 3. 表示 “错误地”的前缀： mis - mislead , misunderstand 4. 表示 “在……之间，相互”意思的前缀： inter- 表示“在……之间，相互”：Internet Presentation 前缀 含义 例词 dis- 不 disagree, dislike en- 使……处在某种状态 enable, enrich im-, in- 不 impossible, impatient, inexpensive inter- 在……之间 international, interconnect mis- 错误的 mislead, misunderstand non- 不，非 non-smoker, non-native re- 再，重复 rewrite, retell un- 不 unable, unhappy, unpopular Presentation 后缀： –able表示“可能，易于，适合于”， 构成形容词， 如：renewable, eatable(可吃的)，enjoyable 常见的后缀： Presentation 2. –ful表示“充满……的，具有……性的”， 构成 形容词，如：helpful, hopeful, powerful , useful, careful, beautiful 3. –less 与-ful 相反，表示“少的，不足的”，构成 形容词，如：helpless, hopeless, powerless, useless, careless Presentation 1. 动词变名词： -ation -ment -er -or invitation, education, agreement, government 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 Presentation 2. 形容词变名词： -ness -ty happiness, meanness, carelessness activity, safety 3. 名词、形容词变动词： -ify -ize -en beautify, simplify realize quicken, widen, sharpen Presentation 4. 名词变形容词： -y -ous -ful windy, rainy, sandy dangerous, humorous helpful, careful, peaceful Presentation 后缀 含义 例词 -er, -or 构成名词 teacher, worker, visitor -ian musician -ing building, paintin ... ...
