"Are you through with your breakfast?"

Translation: As-tu fini ton petit déjeuner ?

[eunoia]

Why is finis used in "As-tu finis ton petit-déjeuner ?", where fini is used in "Avez-vous fini votre petit-déjeuner?"? Because of context?

[bucko]

I think 'finis' is a mistake, surely it should be 'fini'?