I just couldn`t agree with him on the plan.
I just couldn`t agree to / on the plan.
I think that the first sentence is correct but what about the second one? As far as I know the verb "agree" goes with the preposition "with" if a person is involved :
e.g. I agree with John.
but if I want to say that I agree to his plan, shall I use the preposition "to" or "on" ?.
I agree to/on his plan. Which one is correct?
Thank you very much.