advertir Imperfect Subjunctive Conjugation
advertir — to warn
The imperfect subjunctive uses the 'advirt-' stem for all forms: advirtiera, advirtieras, etc.
advertir Imperfect Subjunctive Forms
When to Use the Imperfect Subjunctive
Use this for hypothetical past situations or in 'if' clauses—like 'If I had warned you...' or 'He asked that we notice the details.'
Notes on advertir in the Imperfect Subjunctive
The stem comes from the third-person preterite (advirtieron), so it uses the 'i' stem change throughout.
Example Sentences
Si yo te advirtiera, no me creerías.
If I warned you, you wouldn't believe me.
yo
Me pidió que le advirtiera sobre cualquier cambio.
He asked me to warn him about any change.
él/ella/usted
Si nosotros advirtiéramos el error, lo corregiríamos.
If we noticed the error, we would correct it.
nosotros
Common Mistakes
Mistake: Using 'advertiera' instead of 'advirtiera'.
Correct: advirtiera
Why: This tense always follows the stem of the 3rd person preterite, which is 'advirt-'.
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Related Tenses
Present
yo: advierto
In the present, advertir has an e→ie stem change in all forms except nosotros and vosotros.
Preterite
yo: advertí
The preterite of advertir features a stem change (e→i) only in the third-person forms: advirtió and advirtieron.
Imperfect
yo: advertía
The imperfect of advertir is regular: advertía, advertías, advertía, advertíamos, advertíais, advertían.
Future
yo: advertiré
The future tense of advertir is entirely regular, using the full infinitive as the stem.
Conditional
yo: advertiría
The conditional of advertir is regular, formed by adding -ía endings to the full infinitive.
Present Subjunctive
yo: advierta
The present subjunctive of advertir changes e→ie in the boot and e→i in the nosotros/vosotros forms.
Affirmative Imperative
yo: advierte
The imperative uses 'advierte' for informal commands and 'advierta/n' for formal ones.
Negative Imperative
yo: no adviertas
The negative imperative always uses the present subjunctive forms: no adviertas, no advierta, etc.