good:better,best
many:more,most
big:bigger,biggest
smart:smarter,smartest
badly:more~,most~或者worse,worst
carefully:more~,most~
slowly:more~,most~
healthy:more~,most~
hot:hotter,hottest
far:farther,farthest
heavy:heavier,heaviest
old:older,oldest
expensive:more~,most~
well-known:better-known,best-known
little:less,least
few:fewer,fewest
thin:thiner,thinest
easily：easilier,easiliest
often:oftener,oftenest或者more~,most~
large:larger,largest
这可真是个大工程啊，累！
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