一、基本用法：
1、形容词比较级+than：
Jack is taller than Tom。
2、more/less/fewer+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。
4、the+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：
1、more and more。。。（越来越……）
Lucy becomes more and more beautiful。
2、the 。。。， 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。（沪江英语）