Preterite vs. imperfect is the topic Spanish teachers dread most, mostly because it is usually taught as a list of rules and acronyms that leak the moment students write a real story. What works better is one image students can apply to any sentence: the preterite tells what happened; the imperfect describes what things were like while it happened. Build the imperfect on its own first, then let the two tenses meet inside stories.
1. Teach the imperfect on its own first
The good news for students: the imperfect is the most regular tense in Spanish.
- -ar verbs: -aba → hablaba, hablabas, hablaba, hablábamos, hablabais, hablaban.
- -er / -ir verbs: -ía → comía, vivía, teníamos, salían.
- Only three irregulars: ser → era, ir → iba, ver → veía. And hay becomes había.
Give it two jobs at A2: describing the past (people, places, weather, age, time) and past habits ("used to"). Childhood is the perfect context: De niño vivía en un pueblo. Mi casa era pequeña. Todos los veranos íbamos a la playa. Students talk about themselves and use the tense a dozen times without any contrast at all.
2. The model: the story vs. the scenery
Once both tenses are familiar, introduce the contrast through a film or a play. The imperfect is the scenery: the setting, the weather, what people looked like, what was going on in the background. The preterite is the action: the events that move the story forward, one after another.
- Era sábado y hacía sol. Las calles estaban llenas de gente. — scenery (imperfect)
- Salí de casa, compré pan y llamé a Marta. — events (preterite)
A quick visual: draw the imperfect as a long wavy line and each preterite event as an X on top of it. Students can sketch the timeline for any sentence they are unsure about.
3. Interrupted actions: mientras and de repente
The most useful pattern at A2 is one action in progress interrupted by another:
- Mientras cenábamos, sonó el teléfono.
- Leía en el sofá cuando de repente se fue la luz.
The background action (wavy line) takes the imperfect; the interruption (X) takes the preterite. Mientras usually goes with the imperfect; de repente and de pronto introduce a preterite. Estaba + gerundio (estaba leyendo) does the same job as the imperfect here, and students often find it more transparent.
4. Time markers are clues, not rules
Markers help, so teach them, but present them as tendencies:
- Usually preterite: ayer, el lunes, una vez, de repente, en 2015, dos horas (a closed period).
- Usually imperfect: siempre, todos los días, a menudo, de niño, antes, mientras.
Then show why they are only clues: Ayer hacía frío (description on a specific day) is perfectly normal. Students who understand the scenery/action model can handle these; students who only memorized the markers cannot.
5. Tell the story twice
A reliable practice routine: students first write a story as a bare list of events (preterite only: Llegué al aeropuerto. Perdí la maleta. Llamé a mi hermana.). Then they rewrite it adding scenery between the events (Eran las seis de la mañana y había mucha gente…). The contrast becomes something they do, not something they analyze.
Common mistakes and how to catch them
- Preterite for age and life stages: *Cuando fui niño… Childhood is scenery: Cuando era niño…
- Imperfect for a closed period: *Ayer estaba en el gimnasio dos horas. A period with a clear start and end is one finished event: estuve dos horas.
- Telling the time: *Fue las tres. Time in the past is background: Eran las tres.
- Había vs. hubo: Había mucha gente describes the scene; Hubo un accidente reports an event. At A2, había covers almost every case.
- Everything in one tense: stories written entirely in the preterite read like a police report. Ask: "What was the weather like? How did you feel?"
A 45-minute lesson shape that works
- 5 min — Warm-up: show an old photo; students describe it with era, había, tenía, llevaba.
- 10 min — The scenery/action model with a short story on the board; students colour-code imperfect and preterite verbs.
- 10 min — Interrupted actions: picture prompts with mientras… de repente…
- 15 min — "Tell the story twice": events first, then add the scenery in pairs.
- 5 min — Exit ticket: one sentence with an action in progress and an interruption.
Free worksheets for this lesson
These printable PDFs follow the same order: the imperfect on its own, then the contrast, then full personal stories.
- The Imperfect Tense – Grammar (A2) — descriptions and habits in the past: era, vivía, jugábamos.
- The Imperfect Tense – Reading (A2) — a childhood neighborhood, summers with grandma and school days.
- The Imperfect Tense – Practice (A2) — describe your childhood: vivía, jugaba, había.
- Preterite vs. Imperfect – Grammar (A2) — completed events vs. background, with de repente and mientras.
- Preterite vs. Imperfect – Reading (A2) — a rainy walk, a school trip and a birthday party.
- Preterite vs. Imperfect – Practice (A2) — choose the tense in dialogues and connected stories.
- Preterite vs. Imperfect – Writing (A2) — a short story with events and background description.
- Narrating Past Experiences – Writing (A2) — a personal experience using three past tenses to close the unit.
Browse all Spanish grammar worksheets or the full A2 collection.