规则变化:后面加er或est;以字母e结尾的加r或st;结尾是辅音字母,并且前面有一个元音字母的,双写辅音字母再加er或est;以辅音字母加y结尾的变y为i,在加er或est;多音节词,在词前加more或most。不规则变化:good\well better best;bad\badly worse worst;many\much more most;little less least;far farther farthest\ further furthest