形容词和副词的比较级

(1) 一般在形容词或副词后+er

older taller longer stronger, etc

(2) 多音节词前+more

more interesting, etc.

(3) 双写最后一个字母，再+er

bigger fatter, etc.

(4) 把y变i，再+er

heavier, earlier

(5) 不规则变化：

well-better, much/many-more, etc.