Indefinido vs Imperfecto
You know both past tenses now. The real skill is choosing between them. Quick rule: indefinido tells you 'what happened'; imperfecto tells you 'what was going on / what it was like'. In a real story they work as a pair — imperfecto paints the backdrop and habits, indefinido drops in concrete events.
A simple test
Ask yourself: am I talking about a SPECIFIC moment or a PERIOD/BACKDROP? Specific moment → indefinido. Describing a period → imperfecto. Ayer comí pan — specific moment. Antes comía pan todos los días — habit. Cuando llegué, comía pan — I arrived (moment) while eating bread (backdrop).
Imperfecto = backdrop, indefinido = event
Classic combo: Mientras yo leía un libro, sonó el teléfono. (While I was reading a book, the phone rang.) leía — backdrop, ongoing; sonó — specific event that breaks in. Same idea: Cuando era niño, fui una vez a Madrid = when I was a kid (backdrop), I went once to Madrid (event).
Trigger words
INDEFINIDO often appears with: ayer, anoche, esa noche, el martes, el año pasado, en 2020, hace dos días, un día, de repente. IMPERFECTO often appears with: antes, siempre, todos los días, normalmente, a menudo, mientras, cuando era niño, de joven, cada año. Not a rule, but a strong pattern.
Verbs that shift meaning
A few verbs change nuance between the two tenses. saber: sabía = used to know; supe = found out (in that moment). conocer: conocía = knew (was acquainted with); conocí = met for the first time. querer: quería = wanted (ongoing); quise = tried / decided to. tener: tenía = had; tuve = got (received). This isn't a trap — it's a useful tool. Often matches English nuances like 'wanted' vs 'tried'.
How it maps to English
Imperfecto often translates as 'used to', 'would (do)', 'was -ing'. Indefinido translates as the simple past ('I did, I went, I ate'). Iba a la escuela = I used to go to school / I would go to school. Fui a la escuela = I went to school (that day). Not a perfect 1:1, but a great starting intuition.
A typical narration
Era una mañana de domingo. Hacía sol y los pájaros cantaban (backdrop — imperfecto). De repente, oí un ruido y vi a un gato negro en el jardín (events — indefinido). El gato me miró un momento y se fue (events — indefinido). Yo lo seguí, pero ya no estaba (last clause — backdrop, imperfecto). That's the typical structure of Spanish storytelling.
