You uoght to have given them some advice?So I did.为什么不用So I ought?

You uoght to have given them some advice?So I did.为什么不用So I ought?

ought to have done 这里表示推测,与过去事实不相符,所以仍属于过去时态.

ought to have done的意思是　本应干某事（实则未干）。由些可见上文误会其未做那件事，而回答者要表述“我确实干了”　So I did.表示干了