比较级的详细用法-1.ppt

形容词的比较级 概念及结构 在对两者进行比较时，形容词要采用比较级形式。形容词比较级之后多用than引出比较的对象。 即：比较级 + than，than后面连接另一个作比较的人或物。 形容词比较级 1. 比较级的构成 单音节词和少数双音节词，在词尾加er。 单音节形容词比较级变化口诀： 比较级要变化，一般词尾加er。 词尾若有哑音e，直接加r就可以。 一般重读闭音节，末尾辅音须双写。 辅音字母加y型，变y为i加er。 多音节有规则，原形前面加上more。 比较级的运用 1. A + be + 比较级 + than B。表示“A比B更…” eg: I am taller than Li Lei. This room is bigger than that one. 练习： 我的自行车比你的新。 My bike is newer than your bike. My bike is newer than ____. 注：比较必须在同类事物之间进行。 比较级中的代替词 1. that：代替前文中的单数名词或不可数名词。 eg: The engine of your car is better than _________ of mine. The population of China is larger than _____________ of America. 2. those：代替前文中的人或物的复数名词。 eg: The girls in your class are more beautiful than ______ in ours. The ears of a rabbit are longer than _____ of a cat. 2. A + be + 数词 + 名词 + 比较级 + than B. eg: Tom is two years older than I. Nancy is three years younger than Sam. 练习： 长江比黄河长1000千米。 The Changjiang River is 1000 __ __ __ the Yellow River. 姚明比我高1米。 Yaoming is 1 __ __ __ I. 3. “比较级 + and + 比较级”表示“越来越…，又…又…”。 eg: It is getting warmer and warmer. You are taller and taller. 练习： In winter the weather is getting __ __ __.(越来越冷) I hope you will be __ __ __.(越来越聪明) The life for us is becoming __ __ __.(越来越好) 注：在运用“比较级 + and +比较级”时，如果遇到多音节的形容词，如：beautiful，其比较级是more beautiful，“越来越漂亮”—more beautiful and more beautiful，应该表达为：“more and more beautiful”。 即：more and more +多音节形容词。 练习： The questions are __ __ __ __.(越来越难) The cars are __ __ __ __.(越来越贵) Computers are __ __ __ __.(越来越重要) 4. “The+比较级+主语+动词，the+比较级+主语+动词”表示“越…，就越…”。 eg: The harder you study, the better you are. The more you eat, the fatter you are. 练习： 我们种植越多的树木，空气就会越新鲜。 __ __ trees we plant, __ __(fresh) air we will have. 5. 相同程度比较的句型：as + 形容词或副词原形 + as，表示“与……一样”。 eg: Jack is as tall as Peter. This dress is as espensive as that one. He runs as fast as I. 练习： 1. This bridge is __ __ __(和…一样长) that one. 2. My dad is __ __ __(与……一样大) my mum. 拓展： A + 数词 + time(s) + as ... as + B。表示“A是B...几倍。” eg: My house is three t