用英语询问星座，你可以说：

What's your zodiac sign？

What star sign are you？

Can you tell me your constellation？

回答时，你可以说：

I'm a [星座名](例如：I'm a Leo.)

I'm born under the sign of [星座名](例如：I'm born under the sign of Aquarius.)

My zodiac sign is [星座名](例如：My zodiac sign is Scorpio.)

希望这能帮到你，