Module 12 unit 3课件2023-2024学年外研版九年级英语上册

Module 12 Save our world Unit 3 Language in use Word formation（构词法） 合成法 派生法 （加前缀、后缀） 转化法 1. 合成法 将________________独立且语义不同的单词合在一起构成新词的方法。 合成名词 home+work foot + ball (2) 合成形容词 hard + working easy + going (3) 合成动词 down + load homework football hardworking easygoing download 两个或两个以上 Ex.5 Complete the sentences. (P101) A _________ 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. 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. postcard classroom storybook blackboard lunchbox 2. 派生法 通过在______前面加_____或在_____后面加______构成一个新词的方法。 词根 前缀 词根 后缀 常见前缀 ① im-, un-, in-, dis-，non-等，表示否定。 possible --- happy --- correct --- agree --- smoker--- impossible unhappy incorrect disagree non-smoker ② re-, 表示重复. build --- ③ en-, 表示使...处于某种状态 rich--- rebuild enrich rewrite, reuse, recycle understand--- ④ mis- 表示 错误地 ⑤ inter-表示 在…之间，相互 national--- misunderstand international 后缀 含义 例词 -er, -or 构成名词 teacher, worker, visitor -ian musician -ing building, painting, shopping -ist artist, scientist -ment agreement, government -ness coldness, happiness, illness -th truth, warmth -tion competition, education, information -ty activity, safety (2) 常见后缀 ①名词后缀 后缀 含义 例词 -able -ible 构成形容词 comfortable, enjoyable -al environmental, international -ful careful, helpful -ive active, expensive -less careless, helpless, homeless -ly friendly, lovely, monthly -ous dangerous, famous ② 形容词后缀 ③ 副词后缀：-ly. slow--- (注意：不是所有ly结尾的都是副词。 love---lovely, friend---friendly） ④数词后缀 slowly -teen 构成数词 eighteen, fifteen, seventeen -th fifteenth, fifth, fortieth, seventh -ty forty, sixty, twenty (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. 由 interest 可以派生出：