The preterite tense is a completed action in the past, and the imperfect is something that happened in the past but was ongoing. - Te llamé dos veces ( I called you twice-completed action) -Él vivió<span> allí por cinco años. (He lived there for five years- completed action) </span>-<span>Yo </span>caminaba<span> cada día. ( I used to walk everyday. - was ongoing) </span>Yo comía<span> frecuentemente McDonald's. ( I used to McDonald's frequently.- occurred over a long period of time)</span>