英文翻译为：
祝你生日快乐。
Happy birthday to you
例句：
1、用我全身心的爱祝你生日快乐！
Happy birthday and all the days to follow will be happy ones for you!
2、想念你，亲爱的，以无限的爱和真情，祝你生日快乐。
Thinking of you, dear, with endless love and affection on your birthday.
3、我的朋友为我唱“祝你生日快乐”歌，并送我一些礼物。
My friends sang “ Happy birthday to you!” and gave me some presents.