easy , dirty,fine,happy,early,able,terrible,quiet,late,cleve

easier,esiest
dirtier,dirtiest
finer,finest
happier,happiest
earlier,earliest
abler,ablest
more terrible,most terrible
quieter,quietest
later,latest
clever,clevest
三音节及以上的用more,most
其余的姐翻了牛津...
naughtier,naughtiest