How old are you?意思是：你多大了？这是对年龄的提问。可回答：I am+年龄+years old.或简短的回答：年龄+years old.再简单点的可以直接回答：年龄。

英语对话

1.How old are you?
I am 14 years old./I am 14./14 years old./14.
2.What's that smell?（这是什么味儿？）
Oh,no!Something's burning.（噢，不好！是什么糊了吧。）
=I wonder what that smell is?
=I wonder where that smell is coming from?
3.What's that noise?（什么声音？）
It's my alarm clock.（是我的闹钟的声音。）
4.What is this line for?（这是排什么的队？）
I have no idea.（我也不知道。）
Why are people lined up?（人们为什么排队？）
5.May I ask you a question?（我可以问一个问题吗？）
Sure,what is it?（当然，什么问题？）

how old are you还能怎么说

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?

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。