bought
Has comprado más estampillas de lo necesario.
You bought more stamps than necessary.
Me alegro de no haber comprado tal cosa.
I'm glad I didn't buy such a thing.
I should have bought one.
You should have bought one.
Deberíamos haber comprado otra botella de vino.
We should have bought another bottle of wine.
Estoy muy triste de que no me hayas comprado ningún regalo.
I'm very sad that you didn't buy me any gifts.
No debí haber comprado tal cosa.
I shouldn't have bought that thing.