-ir verb irregular · c>zc Advanced

deducir — Preterite (Pretérito)

to deduce

The preterite conjugation of deducir (irregular c>zc, ranked #2103). Describes completed past actions with a clear start and end. Key signals: ayer, el lunes pasado, de repente.

Drill the preterite tense with spaced repetition Practice deducir and 965 other verbs in the Conjugado app — free to try.
Practice for free ↗
Pronoun Preterite conjugation
yo deduje *
dedujiste *
él/ella/Ud. dedujo *
nosotros dedujimos *
vosotros dedujisteis *
ellos/ellas/Uds. dedujeron *

* Red forms deviate from the regular -ir preterite pattern.

Example sentence

Dedujo la respuesta por lógica.

He deduced the answer through logic.

Other tenses of deducir

See full conjugation table for deducir →

Related verbs

See all 1,316 verbs in the preterite tense

Browse Preterite tense →