prevenir Affirmative Imperative Conjugation
prevenir — to prevent
The affirmative commands are: prevén (tú), prevenga (usted), prevengamos (nosotros).
prevenir Affirmative Imperative Forms
When to Use the Affirmative Imperative
Use to give direct orders or advice to avoid a negative outcome.
Notes on prevenir in the Affirmative Imperative
The 'tú' form is 'prevén' (shortened like 'ven'). Other forms use the subjunctive stem 'preveng-'.
Example Sentences
¡Prevén cualquier riesgo antes de salir!
Prevent any risk before leaving!
tú
Prevenga el fuego con estas precauciones.
Prevent fire with these precautions.
Prevengamos el desperdicio de agua.
Let's prevent water waste.
nosotros
Common Mistakes
Mistake: previene (command)
Correct: prevén
Why: Like 'ven', the imperative 'tú' for prevenir is the irregular 'prevén'.
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Related Tenses
Present
yo: prevengo
Prevenir is a stem-changing verb (e > ie) with a special 'yo' form: prevengo.
Preterite
yo: previne
Prevenir uses an irregular stem 'previn-' in the preterite: previne, previste, previno...
Imperfect
yo: prevenía
Prevenir is completely regular in the imperfect: prevenía, prevenías, prevenía...
Future
yo: prevendré
Prevenir uses the irregular stem 'prevendr-': prevendré, prevendrás, prevendrá.
Conditional
yo: prevendría
Prevenir uses the irregular stem 'prevendr-' plus -ía endings.
Present Subjunctive
yo: prevenga
The present subjunctive uses the 'preveng-' stem: prevenga, prevengas, prevenga.
Imperfect Subjunctive
yo: previniera
Based on the preterite stem: previniera, previnieras, previniera.
Negative Imperative
yo: no prevengas
Negative commands use 'no' + present subjunctive: no prevengas, no prevenga.