猜你想说的是birthday是可数名词吗。
birthday是不可数名词。
birthday：n.生日
Are you having a big do for your birthday?
你打算举行大型生日宴会吗？
What did you get for your birthday?
你收到什么生日礼物了？
The birthday card arrived three days late.
生日贺卡晚到了三天。
温馨提示：
