old也可以做名词。
We will play a trick on the old abbot .
我们要跟老修道院长开个玩笑。
The old man's former cronies are all dead .
老人的往日故旧都已作古。
Old age has not dimmed her memory .
她虽然年事已高，但记忆并未模糊。
We made the circuit of the old city walls .
我们绕着旧城墙转了一圈。
I want to search out an old school friend .
我想寻找我的一个老同学。
