old/əʊld $ oʊld/

a. having lived, existed or been used for a long time

n. [the ~] old people

a. 老的；古老的；旧的：an old man 老头

◇an old university 古老的大学

◇a pair of old shoes 一双旧鞋子

◇an old friend 老朋友

◇His son is 10 years old. 他的儿子10岁了。

◇a 10-year-old boy 10岁的男孩

◇I feel I am getting（或growing) old. 我感到自己老了。

◇How old is your little sister? 你妹妹多大了？

◇How old is your house? 你的房子房龄有多少了？

◇in the old days 在过去的日子里

n. [the ~] [P] 老年人：[the old + v. 复] The old are less active than the young. 老年人没有年轻人活跃。

◇Both young and old enjoyed themselves at the party. 老老少少在派对上都玩得很开心。

音组-old/-əʊld $ -oʊld/

cold; fold; gold; hold; old; scold

常犯错误

✗ a boy of 10 years old

✓ a boy of 10 一个10岁的男孩

常犯错误

✗ a twenty-years-old girl

✓ a twenty-year-old girl 一个20岁的女孩

用法elder/eldest表示长幼，但现在用older/oldest表示长幼也很常见。如：He is the oldest (或eldest) of the four brothers.

◇my older(或elder) brother。

谚语It's never too old to learn. 活到老，学到老。

辨析elder; older