Answer:
Preterit: Involves actions that are fully completed and were done once at a specific time.
Imperfect: about actions that were repeatedly performed during a past period of time.
Esdrújulas. La sílaba antepenúltima, o tercera desde el final, en Esdrjulas tiene un acento ortográfico. No hay excepciones al acento escrito en estos términos.
Espero que esto ayude, amigo.