爸爸生日快乐用英文怎么表达？用英文怎么写

　　I hope you have a very happy birthday, dad.

　　愿您有一个很愉快的生日，爸爸。

　　The cake had 'Happy Birthday' piped on it.

　　蛋糕上裱了“生日快乐”的'字样。

　　I wished her a happy birthday.

　　我祝她生日快乐。

　　We all crowded into her office to sing 'Happy Birthday'.

　　我们全都涌进她的办公室，唱“祝你生日快乐”。

　　He piped "happy birthday" on the cake.

　　他在蛋糕上镶上了“生日快乐”的字样。