1. Cuando era pequeña, Sara bailaba ballet todos los lunes y miércoles.
Ayer Sara bailó ballet en el recital de la universidad.
When she was young, Sara used to dance ballet every Monday and Wednesday. Yesterday Sara danced ballet at the university's show.
2. La semana pasada, (yo) le escribí un mensaje electrónico a mi papá.
Antes (yo) le escribía cartas.
Last weekend, I wrote an email for my dad. Before, I used to write letters to him.
This is an exercise to practice preterite and imperfect tenses. Preterite tense is used for completed actions (like bailó and escribí) while imperfect tense is used for actions that do not have a definitive end (bailaba and escribía).