原级的用法

　　1. as…（形容词 / 副词原级）as…   

　　表示“A和B的程度相同”

　　例如：Heis as tall as his brother. / He runs as quickly as Jim.

　　2. not as / so…（形容词 / 副词原级）as…   

　　表示“A不如B…”

　　例如：Thatgirl isn’t as / so fat as Amy.

　　3. less + adj. / adv.原级 + than   

　　表示“没有…adj. / adv.”

　　例如：Sheis less beautiful than her sister.

　　He runs less quickly than Jim.