This document discusses using the preterite tense in Spanish to express how long ago something occurred. It provides the formula "Hace + length of time + que + subject + verb in preterite tense" and examples like "Hace diez minutos que yo terminé mi tarea" (I finished my homework 10 minutes ago) and "Hace tres años que salimos Dallas" (We left Dallas 3 years ago). Practice translations are also included applying this formula and tense.