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课件网) Grammar 原级 比较级 最高级 比较等级分类 原级 比较级 最高级 一、原级 1 原级的结构 as … as +adj. / adv.+ 和…一样… 原形 He is as tall as Mary. 他和Mary 一样高。 He runs as fast as Mary. 他跑得和Mary 一样快。 肯 not so … as 一、原级 1 原级的结构 not as … as +adj. / adv.+ 不如…… 原形 He is as tall as Mary. 他不如Mary 高。 He runs as fast as Mary. 他跑得不如Mary 快。 否 He is not as tall as Mary. He _____ as fast as Mary. does not adj. 思考：tall, fast 的词性是什么？为什么？ adv. 一、原级 2 原级的倍数 as … as +adj. / adv.+ 分倍数 原形 This pencil is as long as that one. 这只铅笔是那只的2倍长。 这只铅笔是那只的3倍长。 倍 This pencil is _____ as long as that one. twice 思考1：4倍长？ This pencil is _____ as long as that one. three times 这只铅笔是那只的1/2长。 This pencil is _____ as long as that one. one second 这只铅笔是那只的2/3长。 This pencil is _____ as long as that one. two thirds 思考2：分数表达？ 子基母序，子>1,母+s They speak English just as_____as native speakers do. A．good B．better C．well C 练 They doesn’t dance so _____as I do. A．good B．better C．well C more practice P44 二、比较级 He is shorter than me. 他 是 更矮的 比 我。 He runs faster than Mary. 他 跑得 更快 比 Mary。 他 比我矮。 他 比Mary跑得快。 思考1：shorter？ faster 概念理解：两者比较 fast faster fastest 1). 单音节词直接加er→est（单音节：一个元音） 2).不发音e结尾，只加r→st（如nice-nicer-nicest） 比较级最高级规则变化 1 big bigger biggest 3). 重读闭音节,双写尾字母 +er→est。（元音重读’+最后辅音） 比较级最高级规则变化 1 big, fat, mad, glad, sad, wet, hot, red, thin (大胖神经高兴伤心湿红热瘦) heavy heavier heaviest 4).以辅音字母加y结尾, 变y为i ， +er→est。 比较级最高级规则变化 1 expensive more expensive most expensive 5). 多音节和部分双音节的词，比较级加more→最高级加 most 比较级最高级规则变化 1 类别 构成方法 原级 比较级 最高级 tall taller 一般直接加-er/-est tallest nice nicer 以不发音的e结尾加-r/-st nicest 以重读闭音节结尾且 末尾只有一个辅音字母 双写辅音字母加-er/-est biggest happy happier 辅y结尾变y为i加-er/-est happiest 单音节和 少数双音节词 比较级前加 more/the most more delicious 多音节和 部分双音节词 the most delicious big bigger delicious 比较级最高级规则变化 1 由"动词+后缀-ing/-ed"构成的形容词，在词前加most构成最高级: 变形规则 1 interesting-most interesting; bored-most bored 由"形容词+后缀-ly"构成的副词，在该副词前加most构成最高级: 2 slowly-most slowly; happily-most happily “-ful/-less"构成的形容词，在词前加most构成最高级: 3 careful-most careful; useless-most useless 注意：friendly和early需把y变为i，再加est shy特殊记：shyer--shyest 比较级最高级 2 不规则变化 变 形 记 bigger biggest more boring most boring busier busiest more difficult most difficult easier easiest fatter fattest finer finest better best greater greatest happier happiest healthier healthiest more interesting most interesting older/elder oldest/eldest more relaxing most relaxing shorter shortest small smaller smallest tidier tidiest ... ...
