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prevenir Imperfect Subjunctive Conjugation

prevenirto prevent

B1irregular -ir★★★★★
Quick answer:

Based on the preterite stem: previniera, previnieras, previniera.

prevenir Imperfect Subjunctive Forms

yopreviniera
previnieras
él/ella/ustedpreviniera
nosotrospreviniéramos
vosotrosprevinierais
ellos/ellas/ustedesprevinieran

When to Use the Imperfect Subjunctive

Use for hypothetical 'if' situations (If I prevented...) or after past-tense verbs expressing influence or emotion.

Notes on prevenir in the Imperfect Subjunctive

This tense is built from the third-person plural preterite (previnieron), using the 'previn-' stem.

Example Sentences

  • Si yo previniera el problema, no estaríamos así.

    If I prevented the problem, we wouldn't be like this.

    yo

  • Fue una pena que no previnieran el ruido.

    It was a shame they didn't prevent the noise.

    ellos/ellas/ustedes

  • Te pedí que previnieras a tus amigos.

    I asked you to warn/prevent your friends.

Common Mistakes

  • Mistake: preveniera

    Correct: previniera

    Why: The imperfect subjunctive must use the same 'i' stem as the preterite (previn-).

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