demostrar Affirmative Imperative Conjugation
demostrar — to prove
The imperative uses 'demuestra' (tú) and 'demuestre' (usted), following the o > ue stem change.
demostrar Affirmative Imperative Forms
When to Use the Affirmative Imperative
Use the imperative to command someone to prove their point or show their skills.
Notes on demostrar in the Affirmative Imperative
The 'tú' form is 'demuestra' (matches the present indicative él/ella form). The other forms match the present subjunctive.
Example Sentences
¡Demuestra lo que vales!
Show what you're worth!
tú
Demuestre su identificación, por favor.
Show your ID, please.
Common Mistakes
Mistake: demostra (tú)
Correct: demuestra
Why: The informal 'tú' command must include the 'ue' stem change.
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Related Tenses
Present
yo: demuestro
Demostrar is an o > ue stem-changing verb in all forms except nosotros and vosotros.
Preterite
yo: demostré
Demostrar is regular in the preterite: demostré, demostraste, demostró, demostramos, demostrasteis, demostraron.
Imperfect
yo: demostraba
Demostrar is regular in the imperfect: demostraba, demostrabas, demostraba, demostrábamos, demostrabais, demostraban.
Future
yo: demostraré
The future of demostrar is regular: demostraré, demostrarás, demostrará, demostraremos, demostraréis, demostrarán.
Conditional
yo: demostraría
The conditional of demostrar is regular: demostraría, demostrarías, demostraría, demostraríamos, demostraríais, demostrarían.
Present Subjunctive
yo: demuestre
Demostrar has a stem change (o > ue) in the subjunctive, except for nosotros and vosotros.
Imperfect Subjunctive
yo: demostrara
The imperfect subjunctive is regular: demostrara, demostraras, demostrara, demostráramos, demostrarais, demostraran.
Negative Imperative
yo: no demuestres
The negative imperative uses the present subjunctive: no demuestres, no demuestre, no demostremos, no demostréis, no demuestren.