thin thinner thinnest big bigger biggest 重读闭音节词只有一个
如: big—bigger—biggest,red—redder—reddest thinner thinnest
大的/ bigger 更大/ biggest最大 thin 瘦的/ thinner 更瘦/ thinnest
预订into the thinnest of air
下: fat fatter fattest big bigger biggest thin thinner thinnest