Possible Duplicate:
What does “had had” mean? How does this differ from “had”?
Is this correct usage?
I had had enough food?
Possible Duplicate:
What does “had had” mean? How does this differ from “had”?
Is this correct usage?
I had had enough food?
Yes, it's correct; it uses the past perfect tense.
Edit: you can find a better answer here (and this question is actually a duplicate of that one).