在英语中询问年龄，可以使用以下几种表达方式：

How old are you？

What's your age？

May I ask how old you are？

Would you mind telling me your age？

Which year were you born？

What's the age of you？

Would you mind disclosing your age？

Would you like to tell me your age？

这些表达方式可以根据不同的语境和对话的正式程度进行选择。例如，在非正式的对话中，直接问“How old are you？”可能更为常见；而在更正式的场合，使用“Would you mind telling me your age？”可能更为合适。

示例对话

问：

How old are you？

答：I am [your age]. / I'm [your age] years old.

问：What's your age？

答：I'm [your age]. / I'm [your age] years old.

问：May I ask how old you are？

答：Yes, you may. I am [your age]. / Yes, you may. I'm [your age] years old.

问：Would you mind telling me your age？

答：Not at all. I am [your age]. / Not at all. I'm [your age] years old.

通过这些表达方式和示例对话，你可以有效地在英语中询问他人的年龄。