had
Hubiese sido mejor si no hubiésemos hecho eso.
It would have been better if we hadn’t done that.
Y además hubiésemos comido carne de caballo una semana.
And we would have eaten horse meat for a week.
— Aguirre, la cólera de Dios (1972)
Es como si nosotros, y no Brasil, hubiésemos ganado el partido.
It's as if we, and not Brazil, had won the game.
Porque no hubiésemos tenido esta conversación.
Because we wouldn't have had this conversation.