the + 形容词比较级/最高级,它本身是形容词,但可以当名词来用（省略了后面的名词,且经常都是省略的）.比如
I have two brothers.The taller (one) is the elder (one).
We are having a match.The fastest (player) will get the prize.
顺带一提the+adj.也可以表示n.,...一类人 the rich富人,the old老人,都是复数.