advertir Present Subjunctive Conjugation
advertir — to warn
The present subjunctive of advertir changes e→ie in the boot and e→i in the nosotros/vosotros forms.
advertir Present Subjunctive Forms
When to Use the Present Subjunctive
Use this when there is doubt, emotion, or a request involved—like 'I want you to warn me' or 'It's important that he notices the signs.'
Notes on advertir in the Present Subjunctive
This tense is tricky: the stem changes to 'advier-' for most, but 'advirt-' for nosotros (advertamos) and vosotros (advertáis).
Example Sentences
Espero que me adviertas si cambias de planes.
I hope you warn me if you change plans.
tú
Es importante que ellos adviertan el peligro.
It's important that they notice the danger.
ellos/ellas/ustedes
Sugiero que advertamos a la policía.
I suggest that we warn the police.
nosotros
Common Mistakes
Mistake: Using 'adviertamos' for nosotros.
Correct: advertamos
Why: In the present subjunctive of -ir stem-changers, the 'ie' becomes 'a' or 'i' in the nosotros form (stem becomes 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.
Imperfect Subjunctive
yo: advirtiera
The imperfect subjunctive uses the 'advirt-' stem for all forms: advirtiera, advirtieras, etc.
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.