帮我看看有没有语法错误,

问题描述:

帮我看看有没有语法错误,
I am greatly indebted to you for what you have done and I hope to have the opportunity of rewarding you.

没有语法错误 但是表达上可以更好
I really appreciate what you have done for me and I wish you will offer me the chance to pay back.