happy的名詞形式都有哪些

　　You don't look very happy today.

　　你今天好像不太高興。

　　Happy birthday, sweetheart.

　　生日快樂，親愛的。

　　The Happy Bunny club was heaving.

　　快樂兔子夜總會里擠滿了人。

　　"Happy Easter," he yelled.

　　“復活節快樂，”他喊道。

　　She had a happy childhood.

　　她有一個幸福的童年。