The cake had 'Happy Birthday' piped on it.(蛋糕上裱了“生日快樂”的字樣。)

Happy birthday to a great friend.(祝一個了不起的朋友生日快樂！)

Please tell him happy birthday.(轉告他生日快樂。)

We all crowded into her office to sing 'Happy Birthday'.(我們全都涌進她的辦公室，唱“祝你生日快樂”。)

Happy birthday! The same to you.(生日快樂！你也一樣。)

May father happy birthday!(愿父親生日快樂！)

I was very surprised when all of my friends crowded into my room to say happy birthday to me.(當我所有的朋友涌入我的房間跟我說生日快樂的時候，我感到很驚喜。)

Happy birthday, sweetheart.(生日快樂，親愛的。)

Happy birthday. This is for you.(“生日快樂，這是給你的”。)

A cake with candles means "Happy birthday".(插著蠟燭的蛋糕意味著“生日快樂”。)