谁能帮我用英文翻译 我知道你要的仅仅是一个爱的承诺，但是我给不起

i know what you want is just my promise,but i am sorry i can't.

按照英文的语法习惯，我觉得不一定要完完全全的直译，正好我这学期在学习翻译，当练习一下好了，呵呵。

i knew that you want is just a love pledge, but I cannot give.

I know that you just want a love pledge merely, but I cannot give.