你承诺了我的英文表述是 "You promised me"。这句话来源于拉丁语，其中承诺 (promise) 来自拉丁语 "promittere"，意思是 "to send forth" 或 "to give one's word"。一些例句及中文翻译如下：

你承诺了我你会来帮我。 (You promised me you would come help me.)
你承诺了我你不会把这个秘密告诉别人。 (You promised me you wouldn't tell anyone this secret.)
你承诺了我你会按时交作业。 (You promised me you would turn in your homework on time.)

希望这些信息对您有帮助。