英语的比较结构主要有：as...as，more...than，the most...结构。通常，单音节词和少数双音节词加词尾-er构成比较级，其他双音节词和多音节词在前面加more构成比较级。

一、基本用法：

1.形容词比较级＋than：

  Jack is taller than Tom.

名词+than：

  Lucy spent more money on books than her sister.

3.不定冠词/零冠词+形容词比较级+名词+than：

  Tom is a more efficient worker than Jack.

＋比较级＋of词组：

  Lucy is the taller of the two girls.（两个中较……的一个）

5.比较级形式表达最高级含义：比较级＋than any other+单数名词：（比其他任何……都……） 

  Lucy is taller than any other girl in her class. 露西比班上任何一个女孩都高。（即露西是班上最高的女生。）

二、特殊用法：

and more...（越来越……）

  Lucy becomes more and more beautiful.

..., the...（越……就越……）

  The harder we work, the more progress we will make.

3.比较级前可加much,a lot, far, even, still, a little, no, any等表示程度的词来修饰。      

  The job is far more difficult than before.

4. more和less用作代词，与某些可等级名词搭配：

  He is more/ less of a sportsman than his best friend.

  =He is more/ less sportsmanlike than his best friend.

5.表示倍数的比较级用法：

  倍数+ the + size / length / depth /height +of

 =倍数+ as +形容词原级+ as

 =倍数+比较级+than

  The new building is three times the height of the old one. （这座新楼是旧楼的三倍高。）

 =The new building is three times as high as the old one.

 =The new building is twice higher than the old one.