Spanish 1000
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B116 min read

Pretérito vs imperfecto

Which past? — aspect, story pairs, and verbs that change meaning

In this guide7 sections
  1. Both describe the past — different jobs
  2. Side by side — and the timeline
  3. Story pairs — same scene, different tense
  4. Interrupted action — the classic formula
  5. Verbs that change meaning
  6. Practice 1 — 6 questions
  7. Practice 2 — 6 questions

Both describe the past — different jobs

Native speakers choose by aspect , not by mirroring English. Imperfecto = frame, habit, description, ongoing background. Pretérito = a finished event that moves the story forward.

Think of a film: imperfecto is the wide shot (weather, mood, what was happening); pretérito is the cut to what happened next .

Side by side — and the timeline

Imperfecto paints the background; pretérito marks finished events on the line
Pretérito indefinidoImperfecto
Action typeFinished event, counted momentBackground, habit, ongoing state
Phone callsAyer **llamé** a las ocho. (I called — done)**Llamaba** todos los días. (I used to call)
Entering a scene**Entré** y **vi** a María.**Llovía** y la casa **estaba** vacía.
AbilityNo **pude** ir. (I failed that time)No **podía** ir. (I was unable — general)
Knowing**Supe** la verdad ayer. (found out)Ya **sabía** la verdad. (already knew)
Meeting**Conocí** a Ana en 2020. (first met)**Conocía** a Ana. (already knew her)

Story pairs — same scene, different tense

Each pair below contrasts background (imperfecto) with plot event (pretérito) .

Imperfecto (background)Pretérito (event)
Llovía y hacía viento.De repente sonó un trueno.
Estábamos cenando tranquilamente.Entró un cliente enfadado.
Yo leía en el sofá.Sonó el teléfono y lo cogí.
Hacía mucho calor aquella tarde.Compramos un helado y nos sentamos en la plaza.
Mis padres trabajaban mucho.Un día se mudaron al extranjero.
Caminábamos por el parque.Vi a un amigo y paramos a saludar.
La tienda estaba cerrada.Volvimos a las cinco y entramos.
  • Llovía cuando salí de casa.It was raining when I left home.
  • Mientras comíamos, sonó el teléfono.While we were eating, the phone rang.
  • Hacía buen tiempo; fuimos a la montaña.The weather was nice; we went to the mountains.
  • Veía la tele cuando oí un ruido extraño.I was watching TV when I heard a strange noise.
  • Vivíamos en Barcelona cuando nació nuestro hijo.We were living in Barcelona when our son was born.
  • Eran las once; cerramos la tienda y nos fuimos.It was eleven; we closed the shop and left.

Interrupted action — the classic formula

Imperfecto (ongoing) + cuando + pretérito (interrupting event). Also: mientras + imperfecto, pretérito in the main clause.

FormulaExample
Impf. + cuando + Pret.Dormía **cuando** sonó el despertador.
Mientras + Impf., Pret.**Mientras** estudiaba, **llegó** mi hermana.
Impf. (scene) + Pret. (chain)**Hacía** frío; **cogimos** el metro y **fuimos** a casa.
Pret. + mientras + Impf.**Llamé** mientras **cocinabas**.

Verbs that change meaning

Some verbs shift meaning depending on pretérito vs imperfecto. Three essentials: conocer , querer , saber .

VerbPretéritoImperfecto
conocer**Conocí** a Luis en 2019. = I **met** Luis.**Conocía** a Luis. = I **already knew** Luis.
querer**Quise** ayudarte. = I **tried / wanted** (at that moment; may imply failure).**Quería** ayudarte. = I **wanted** to (ongoing desire).
saber**Supe** la noticia ayer. = I **found out** yesterday.**Sabía** la noticia. = I **already knew**.
poderNo **pude** terminar. = I **failed / could not** (that time).No **podía** terminar. = I **was unable** (general / ongoing).
no quererNo **quise** ir. = I **refused** to go.No **quería** ir. = I **did not want** to go.
  • Conocí a mi jefe en una conferencia.I met my boss at a conference. (first time)
  • Ya conocía el barrio porque vivía allí.I already knew the neighbourhood because I lived there.
  • Quise llamarte, pero se me olvidó.I wanted / tried to call you, but I forgot.
  • Quería estudiar medicina desde pequeño.I had wanted to study medicine since I was little.
  • Supe la verdad por casualidad.I found out the truth by chance.
  • Sabía la respuesta pero no dije nada.I knew the answer but said nothing.

Practice 1 — 6 questions

It was raining when I left →

I met Ana in 2020 (first time) →

I already knew Ana →

While we were eating, the phone rang →

I found out yesterday →

I used to call every day →

Practice 2 — 6 questions

I tried to help you (that moment) →

I wanted to help you (ongoing) →

We were watching TV when she arrived →

I could not go (that specific time) →

I was unable to go (general) →

The weather was nice; we went out →