Make sure to buy your tickets in advance; we don't want them all to be sold before we get there.Asegúrate de comprar tus boletos con antelacion; no queremos que se vendan todos antes que lleguemos.
Can we go to your house tonight? - We should ask my parents in advance.¿Podemos ir a tu casa esta noche? - Deberíamos preguntar a mis padres por adelantado.