interferir Present Conjugation
interferir — to interfere
Interferir is a stem-changing verb in the present tense (e -> ie), except for nosotros and vosotros.
interferir Present Forms
When to Use the Present
Use the present tense to talk about current habits, general facts, or things that are getting in the way of your plans right now.
Notes on interferir in the Present
This is a 'boot verb' where the 'e' changes to 'ie' in all forms except nosotros (interferimos) and vosotros (interferís).
Example Sentences
Mi trabajo no interfiere con mis estudios.
My work doesn't interfere with my studies.
él/ella/usted
Siento que siempre interfiero en tus asuntos.
I feel like I always interfere in your business.
yo
¿Por qué interfieres en la conversación?
Why are you interfering in the conversation?
tú
Common Mistakes
Mistake: Yo interfero.
Correct: Yo interfiero.
Why: Interferir follows the e -> ie stem change pattern in the present tense.
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Related Tenses
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.
Present Subjunctive
yo: interfiera
Interferir has a stem change (ie) and a special nosotros/vosotros change (i) in the subjunctive.
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.