ABSTRACT
A Brazilian friend, Eduardo, invited you spend the weekend at his parents’ beach house in Búzios. Unfortunately, you’ve now realized you can’t go. Write an e-mail saying that you would love to go, but you’re afraid you won’t be able to. You completely forgot that you already have an engagement on Saturday night that you cannot break (desmarcar). Tell him you’re really sorry and you hope there will be another opportunity for you to visit (conhecer) his parents’ house.
