advertir Present Conjugation
advertir — to warn
In the present, advertir has an e→ie stem change in all forms except nosotros and vosotros.
advertir Present Forms
When to Use the Present
Use the present tense for ongoing warnings, habitual actions (like a sign that warns people), or when you notice something happening right now.
Notes on advertir in the Present
This is an e→ie stem-changing verb. The 'e' becomes 'ie' in the 'boot' forms (yo, tú, él/ella/usted, ellos/ellas/ustedes).
Example Sentences
Te advierto que el suelo está mojado.
I'm warning you that the floor is wet.
yo
¿No adviertes el peligro en esta situación?
Don't you notice the danger in this situation?
tú
Advertimos a los clientes sobre los cambios.
We warn the customers about the changes.
nosotros
Common Mistakes
Mistake: Using 'adverto' instead of 'advierto'.
Correct: advierto
Why: Advertir follows the e→ie pattern in the present tense.
Mistake: Using 'advirtimos' in the present.
Correct: advertimos
Why: The nosotros form never takes the stem change in the present indicative.
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Related Tenses
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.
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.