副词的比较级和最高级与形容词的比较级及最高级的构成方法相同,即单音节和部分双音节副词在词尾加“er”、加“est”构成比较级和最高级；多音节副词在副词之前加more和most 构成比较级和最高级；以后缀ly结尾的副词要用more和most.
比如fast – faster– fastest
early – earlier – earliest
late – later– latest
beautifully – more beautifully – most beautifully
slowly– more slowly – most slowly
quickly– more quickly – most quickly
另外还有不规则副词的比较级和最高级：
比如well – better – best
badly – worse – worst
much – more – most
little – less – least
far – farther – farthest