1表示“整岁”，直接用基数词或year，age，例如“他20岁”可表示为：

He is twenty．

He is twenty years old．

He is a twenty-year-old man．

He is aged twenty．

He is at age twenty．

He is at the age of twenty．

He is twenty years of age．

2表示“在某人几十多岁”，用“in one's ＋基数词复数形式”，例如：

他七十多岁。He is in his seventies．（从70岁到79岁之间）

她五十多岁。She is in her fifties．（从50岁到59岁之间）

还可以借助early，middle，late来表达得更明确一些，例如：

那女孩今年二十二、三岁。The girl is in her early twenties．

他今年十四、五岁。He is in his middle teens．

她今年二十八、九岁。She is in her late twenties．

3表示“快满多少岁”用进行时或将来时，例如“他快满十八岁了”可说成：

He is getting on for eighteen．

He is going on eighteen years old．

He willbe eighteen years old．

It willbe his eighteenth birthday．

4表示“不满多少岁”，用副词barely，nearly，al- most，quite，yet，just等，例如“她不满十七岁”有以下几种说法：

She is barely ／nearly ／almost seventeen．

She is not quite ／yet seventeen．

She is just under seventeen．

5表示“差多久满多少岁”用介词off，例如：

他差5个月就满19岁了。He is five months off nineteen．

她再过3年就50岁了。She is three years off fifty．

6表示“超过多少岁”用介词past，例如：

他已年过50。He is past fifty．

他是一个过了中年的人。He is a man past middle age．

那孩子两岁零两个月。The baby is two months past two years old．（编辑：雨巷）