¿Por qué no llamas a un plomero para reparar esa canilla? - He llamado a uno, pero todavía no apareció.Why don't you call a plumber to fix that tap? - I've called one, but he hasn't turned up yet.
¿Sabes cómo está Martín?¿Lo has llamado? - Sí, claro que lo he llamado. Está mejor, pero sigue internado.Do you know how Martin is going? Have you phoned him? - Yes, of course I've phoned him. He's better now, but he's still in the hospital.