(1)一般在词尾+er的:higher faster quicker lower shorter darker slighter lighter taller
(2)以字母e结尾的,词尾+r的:larger wiser nicer
(3)双写辅音字母+er的:bigger wetter
(4)把y变i+er的:happier luckier sexier :)
(5)再词前+more的:beautiful wonderful interesting exciting 凡是多音节的都比较常加more
(6)不规则的:bette