生日birthday可數嗎

　　What did you get for your birthday?

　　你收到什么生日禮物了？

　　The birthday card arrived three days late.

　　生日賀卡晚到了三天。

　　What are you giving your father for his birthday?

　　你打算送給你父親什么生日禮物？

　　I cut a piece of birthday cake for them all.

　　我給他們每個人都切了一塊生日蛋糕。

　　She broke her leg last week ─ and on her birthday too!

　　她上星期把腿摔斷了，而且還是在她生日那一天！