Use the preterite for actions that happened once or finished at a specific time: ayer comí tacos. Use the imperfect for habits, descriptions and background in the past: de niño comía tacos todos los días. A quick test: if it answers “what happened?” use the preterite; if it answers “what was it like?” use the imperfect.
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When to Use the Preterite Tense
The preterite tense is used for:
- Actions completed at a specific time
- Events that happened once
- Actions with a clear beginning or end
Key question: Did the action start and finish?
If yes, use the preterite!
Think of the preterite as the “action movie” tense.
Examples:
- Ayer fui al cine.
(Yesterday, I went to the movies.) - El año pasado viajé a México.
(Last year, I traveled to Mexico.) - Compré un coche nuevo la semana pasada.
(I bought a new car last week.) - Nos casamos en 2015.
(We got married in 2015.) - Estudié tres horas anoche.
(I studied for three hours last night.)
When to Use the Imperfect Tense
The imperfect tense is used for:
- Ongoing or repeated actions
- Background descriptions
- Telling time, age, or weather
- Mental or emotional states
✅ Key question: Was the action continuous, habitual, or background information?
If yes, use the imperfect!
Think of the imperfect as the “background story” tense.
Examples:
- Cuando era niño, jugaba mucho.
(When I was a child, I played a lot.) - Siempre comíamos juntos los domingos.
(We always ate together on Sundays.) - Hacía mucho calor en el verano.
(It was very hot in the summer.) - Mi abuela siempre contaba historias antes de dormir.
(My grandmother always told stories before bedtime.) - Estudiaba mientras escuchaba música.
(I was studying while listening to music.)
Regular Verb Conjugations
Preterite Regular Conjugation
Imperfect Regular Conjugation
Irregular Verb Conjugations
Preterite Irregular Verbs
Imperfect Irregular Verbs
Only three verbs are irregular in the imperfect:
More Example Pairs: Preterite vs Imperfect
Common Mistakes to Avoid
- Don’t use the imperfect when the action has a clear end.
❌ Ayer jugaba todo el día.
✅ Ayer jugué todo el día. - Don’t use the preterite for describing people or settings.
❌ La casa fue grande y bonita.
✅ La casa era grande y bonita.
Quick Practice Challenge
Change the tense of these sentences:
Ella leyó el libro en dos días.
– Ella leía el libro cada noche antes de dormir.
Anoche estudié español.
– Anoche estudiaba español.
Viajamos a Colombia en 2019.
– Viajábamos a Colombia todos los años. (if habitual)
Mi mamá cocinó arroz.
– Mi mamá cocinaba arroz cuando llegué.
Final Thoughts
Understanding preterite vs imperfect doesn’t have to be confusing.
- Preterite = Completed Action
- Imperfect = Ongoing, Habitual, or Background
With regular practice and plenty of examples, you’ll start to recognize the patterns easily—and speak more naturally!
If you want to improve your Spanish and sound more natural, don’t miss our latest blog post: “Think in Spanish! How to Rephrase Sentences Like a Native.” Learn practical tips to restructure sentences like a fluent speaker. Check it out now!
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Mastering Preterite vs Imperfect
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Frequently Asked Questions
The preterite tells what happened: llegué a las ocho. The imperfect sets the scene or describes habits: llovía cuando llegué, it was raining when I arrived. One is the event, the other is the background.
Use it for habits (cada verano íbamos a la playa), descriptions (la casa era grande), age and time in the past (tenía diez años, eran las tres) and actions in progress (estaba cocinando).
Use it for completed actions with a clear start or end: fui a México en 2019, viví allí dos años. Words like ayer, el año pasado and una vez usually point to the preterite.
Yes, and many do: estaba en casa cuando sonó el teléfono, I was at home when the phone rang. The imperfect sets the scene and the preterite interrupts it.
The past tenses click faster when you tell real stories out loud. If you want to practice that with a coach, book a free Spanish Roadmap Session or see conversational Spanish coaching. Also read the future tense and how to say “ago” with hace.
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