生日快乐的英文是HappyBirthday,祝福别人生日可以说:Happybirthday,Ihopetodytreatsyouwell.生日快乐,祝你今天过得愉快。生日快乐歌的英文歌词HappyBirthdaytoyou;HappyBirthdaytoyou;HappyBirthdaytoyou;HappyBirthdaytoyou。