中譯英～ｐｌｅａｓｅ

Everything I do for you would be futile
OR
Everything I do for you would come to no avail
OR
Everything I do for you would be just fruitless efforts
OR
Everything I do for you would only be a waste of time and effort

may be right

I can do nothing to please you!

Everything I have done for you is useless.

I did anything of no avail for you

I do everything for you for nothing.

Everything that I have done for you was in vain.

Yes, you are right