In Spanish, most verbs follow regular conjugation patterns for -ar, -er, and -ir endings. However, many common verbs are irregular, meaning their stem or endings change in some tenses. Irregular verbs often appear in the present tense, preterite, and subjunctive moods.
Key types of irregularities include:
  • Stem changes: Some verbs change the stem vowel in the present tense (e.g., tenertengo, tenertienes).
  • Yo form changes: Verbs like hacer (hago), poner (pongo), and salir (salgo) have irregular first person singular forms.
  • Preterite irregulars: Many verbs have unique roots in the preterite (e.g., tenertuv-, estarestuv-, irfui).
  • Subjunctive irregulars: Irregularities often carry over into the present subjunctive form.
Learning these patterns and practicing common irregular verbs is key to Spanish fluency.

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Last updated: Wed Jun 18, 2025

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