妈妈生日快乐我爱你用英语怎么说

"Happy birthday, mom. I love you"是表达祝福妈妈生日快乐并表达爱意的常用英文短语。

"Happy birthday"是祝福生日快乐的常用语，"mom"是"妈妈"的英文缩写， "I love you" 是表达爱意的常用语。

其他的一些例句：

"Wishing you a very happy birthday, mom" (祝你生日快乐，妈妈)
"Happy birthday to the best mom in the world" (祝世界上最棒的妈妈生日快乐)
"Thank you for always being there for me. Happy birthday, mom" (感谢你一直陪伴我，妈妈生日快乐)