demostrar Future Conjugation
demostrar — to prove
The future of demostrar is regular: demostraré, demostrarás, demostrará, demostraremos, demostraréis, demostrarán.
demostrar Future Forms
When to Use the Future
Use the future when you intend to prove something later or to express probability about someone showing a trait right now.
Notes on demostrar in the Future
Demostrar is regular in the future. Just add the future endings (-é, -ás, -á, etc.) directly to the full infinitive.
Example Sentences
Con el tiempo, demostraré que soy capaz.
With time, I will prove that I am capable.
yo
¿Nos demostrarás los resultados pronto?
Will you show us the results soon?
tú
Ellos demostrarán su valor en la competencia.
They will demonstrate their courage in the competition.
ellos/ellas/ustedes
Common Mistakes
Mistake: demuestraé
Correct: demostraré
Why: Do not use the 'ue' stem change in the future; always use the full infinitive as the base.
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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.
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.
Affirmative Imperative
yo: demuestra
The imperative uses 'demuestra' (tú) and 'demuestre' (usted), following the o > ue stem change.
Negative Imperative
yo: no demuestres
The negative imperative uses the present subjunctive: no demuestres, no demuestre, no demostremos, no demostréis, no demuestren.