español · B1 · grammar · 4 minutes
Preterite or imperfect
Control the camera angle from background scene to bounded event.
Understand the choice
Spanish past tenses express viewpoint, not merely time. The imperfect opens a scene, habit, or action in progress; the preterite presents an event as bounded and lets the narrative move to the next event.
Core rule: Use the imperfect for background or an ongoing frame and the preterite for a bounded event that advances the story.
Notice it in context
Mientras cocinaba, sonó el teléfono.
While I was cooking, the phone rang.
Use the imperfect for background or an ongoing frame and the preterite for a bounded event that advances the story.
Vivíamos allí cuando nació Ana.
We lived there when Ana was born.
The ongoing situation frames the completed birth.
Ayer llovió durante dos horas.
Yesterday it rained for two hours.
The bounded duration favors the preterite.
What to remember
- A single situation can use either tense with a change of viewpoint: viví allí tres años versus vivía allí cuando nació Ana.
- Time phrases are clues, not automatic rules; durante can accompany either tense depending on framing.
Common trap: Do not choose tense from sentence length or the word while alone. Decide how the speaker frames each event: background in progress or bounded interruption.