Can a simple past tense question have a past perfect tense answer?
Q: Did you eat?
A: Yes, I had eaten.
Is the above correct?
As I wonder if a past perfect tense can solely exist without a simple past tense.
I understand a past perfect tense always comes with a simple past tense. But sometimes I can see a situation like the following, for instance, "He had met him before the party". So if the question is restricted to a (past) time, is it possible to give a past perfect tense reply?