Preterite vs Imperfect: The Ultimate Guide to Mastering the Past Tense in Spanish
The difference between Preterite (Pretérito) and Imperfect (Imperfecto) is one of the most difficult topics for English speakers. Here’s a clear, practical guide with rules and real examples.
Quick Comparison Table
| Aspect | Preterite (Pretérito) | Imperfect (Imperfecto) |
|---|---|---|
| Type of action | Completed, specific actions | Ongoing, habitual, or descriptive |
| Time focus | Specific point in time | Background or repeated actions |
| English equivalent | Simple past (I went, I ate) | Used to / Was / Were |
| Examples | Ayer comí paella. | Cuando era niño, comía mucha fruta. |
When to use the Preterite
Use it for actions that are finished and have a clear beginning and end.
- Ayer vi una película. (I watched a movie yesterday.)
- El año pasado viajé a México.
- Llegué a casa a las 8.
When to use the Imperfect
Use it for:
- Habits and routines in the past
- Descriptions (age, feelings, weather, appearance)
- Ongoing or background actions
- Cuando era niño, vivía en Barcelona.
- Hacía sol y cantaban los pájaros.
- Tenía 15 años cuando empecé la universidad.
Key Triggers
Preterite triggers: ayer, anoche, el año pasado, de repente, una vez…
Imperfect triggers: siempre, nunca, a menudo, mientras, cuando era…, generalmente…
Common Combinations (very important)
Often both tenses appear in the same sentence:
- Estaba estudiando cuando sonó el teléfono.
(Background action + interrupting action)
- Vivía en Madrid cuando conocí a mi esposa.
Practice Examples
- Ayer ________ (ir) al cine. → fui
- Cuando ________ (ser) joven, ________ (jugar) mucho al fútbol. → era / jugaba
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