high---higher---highest
tiny---tinier---tiniest
littler---less---least
happy---happier---happiest
famous---more famous---most famous
thin---thinner---thinnest
low---lower---lowest
good/well---better---best
far---farther/further---farthest---furthest
careful---more careful---most careful
interesting---more interesting---most interesting
angry, angrier/more angry
more useful
tired, tireder, the tiredest
bad, worse, the worst
英语中的形容词在表示“比较......”和“最......”这类概念时,要用到特殊形式,我们将这类形式称为比较级和最高级;在表示“和.....一样”的概念时,要用原来的形式,我们将其称为原级。