How old are you?还可以说：What is your age?都是问年龄的。例句：How Old Are You In 2001?2001年你有几岁？
例句
1.But then he said: how old are you?
但他接着问道：你今年多少岁？
2.How old are you, and what is your name?
你多大了？叫什么名字？
3." How old are you?" he asked word by word.
“你几岁啦？”他一字一顿地问道。
4.You are so kind, dear, how old are you?
你真是太好了，亲爱的，你多大了？