. 原级，比较级，最高级的用法： 原级 1. as…+原级+as…; not as(so) +原级+…as… 即，as…as 既可用于肯定句也可用于否定句，但so…as只能用于否定句 2. so, very, quite, rather，too, much too,后加原级。 3. three times as tall as that one.比那高三倍 twice as old as he.比他大两倍 比较级： 1. 根据上下文句意，表示比较时用比较级 Eg. This coat is too small, could you show me a bigger one? 2. 句中有than时，用比较级 3. 句中有 “A or B?”时，用比较级。 4.much, even, a little（lot）, far, still，no，any等修饰比较级 5. “the + 比较级 + of the two”表示“两者中较……的一个”。 Wang Gang is the taller of the two boys. 6. “比较级 + and + 比较级”表示“越来越……”， longer and longer， more and more important，worse and worse 7. “The + 比较级……， the + 比较级……”表示“越……越……”。 The busier he is, the happier he feels. The more food you eat, the fatter you will be… 8.比较级+than any other +单数名词 ’. . =比较级+than the other +复数名词 =最高级+范围 Yejun is taller than any other boy in his class. Yejun is taller than the other boys in his class. Yejun is the tallest boy in his class 最高级： 1. 句中有 “A ，B or C?”时，用最高级。 2.of/among+比较范围（人或物），in +比较范围（class, family, town, country, world…）要用最高级 3.one of +最高级+名词复数 4.形容词最高级前必须加the， 副词最高级前常省略the 5.当最高级前有物主代词、名词所有格修饰时，其前不加the；若两个最高级并列使用，后一个最高级前也可以不加the。 He is our/ Jim’s best friend. Liu Fang is the youngest and shortest girl in our class. 6. the second/third/fourth…+最高级 the second longest river ’. 本文来源：https://www.wddqw.com/doc/8b1f5d56a8ea998fcc22bcd126fff705cd175c66.html