1.直接在词尾加er和est如:tall,small,clean,shortquickcheaplong…2.以e结尾的单词在词尾加r和st如:fine,nice,free,blue,safe,largewide…3.辅音字母加y的单词改y为i加er和est如:happy,easy,pretty,heavy,funny,healthyearly…4.重读闭音节单词双写最后一个字母加er和est如:big,red,thin,slim,wet,hot,fat,sad,glad…5.多音节单词和★部分双音节、少数单音节单词在词前加more和most.dangerous,interesting,expensive,important,popular,friendly,polite,tired…6.特殊形式:1).good--better–best2).well—better—best3).bad/badly—worse—worst4).ill—worse—worst5)many—more—most6).much—more—most7).little—less—least8).old—older—oldest9).old—elder—eldest10).far—farther—farthest(具体)11).far—further—furthest(抽象意义)★注意:much,still,alittle,even,far,abit,agreatdeal…后常用形容词或副词的比较级