interferir Present Subjunctive Conjugation
interferir — to interfere
Interferir has a stem change (ie) and a special nosotros/vosotros change (i) in the subjunctive.
interferir Present Subjunctive Forms
When to Use the Present Subjunctive
Use after expressions of doubt, desire, or emotion, like 'No quiero que...' or 'Es posible que...'.
Notes on interferir in the Present Subjunctive
It follows the -ir stem-changing pattern: 'ie' in the boot, and 'i' in the nosotros (interfiramos) and vosotros (interfiráis) forms.
Example Sentences
No quiero que interfieras en mi relación.
I don't want you to interfere in my relationship.
tú
Espero que nada interfiera con nuestro viaje.
I hope nothing interferes with our trip.
él/ella/usted
Es importante que no interfiramos en su proceso.
It is important that we don't interfere in their process.
nosotros
Common Mistakes
Mistake: Que nosotros interferamos.
Correct: Que nosotros interfiramos.
Why: In the subjunctive, -ir verbs with an e->ie change in the present use 'i' for the nosotros form.
Master Spanish verbs in context
Memorizing tables only gets you so far. Read 200+ illustrated and narrated Spanish stories to see verbs like 'interferir' used naturally — in the tenses you're learning.
Related Tenses
Present
yo: interfiero
Interferir is a stem-changing verb in the present tense (e -> ie), except for nosotros and vosotros.
Preterite
yo: interferí
Interferir has a third-person stem change (e -> i) in the preterite: interfirió and interfirieron.
Imperfect
yo: interfería
Interferir is completely regular in the imperfect: interfería, interferías, interfería...
Future
yo: interferiré
Interferir is regular in the future; simply add endings to the infinitive.
Conditional
yo: interferiría
The conditional of interferir is regular: interferiría, interferirías, etc.
Imperfect Subjunctive
yo: interfiriera
The imperfect subjunctive uses the 'interfir-' stem for all forms (interfiriera, interfirieras).
Affirmative Imperative
yo: interfiere
Use 'interfiere' to tell someone to step in, or 'interfiera' for formal requests.
Negative Imperative
yo: no interfieras
The negative imperative always uses the present subjunctive forms: no interfieras, no interfiera.