Meaning and behavior
What does demostrar mean?
Demostrar means to show, to demonstrate. VerbyGo classifies it as an irregular -AR verb. It is non-reflexive.
to prove.
Build from reliable parts
Principal forms
- Infinitive
- demostrar
- Gerund
- demostrando
- Past participle
- demostrado
Verified irregular pattern
How this verb behaves
Its forms differ from a fully regular -ar pattern in the present.
Conjugation guide
Present forms
Present forms
Present
Use the present forms of demostrar for current situations, routines and actions that happen regularly.
| Subject | Demostrar |
|---|---|
| yo | demuestro |
| tú | demuestras |
| él / ella / usted | demuestra |
| nosotros / nosotras | demostramos |
| vosotros / vosotras | demostráis |
| ellos / ellas / ustedes | demuestran |
Conjugation guide
Past forms
Past forms
Preterite
Use the preterite when the action of demostrar is presented as completed in the past.
| Subject | Demostrar |
|---|---|
| yo | demostré |
| tú | demostraste |
| él / ella / usted | demostró |
| nosotros / nosotras | demostramos |
| vosotros / vosotras | demostrasteis |
| ellos / ellas / ustedes | demostraron |
Past forms
Imperfect past
Use the imperfect for repeated or ongoing past uses of demostrar, or for background information.
| Subject | Demostrar |
|---|---|
| yo | demostraba |
| tú | demostrabas |
| él / ella / usted | demostraba |
| nosotros / nosotras | demostrábamos |
| vosotros / vosotras | demostrabais |
| ellos / ellas / ustedes | demostraban |
Conjugation guide
Future and conditional
Future and conditional
Simple future
Use the future forms of demostrar for predictions, promises and future statements.
| Subject | Demostrar |
|---|---|
| yo | demostraré |
| tú | demostrarás |
| él / ella / usted | demostrará |
| nosotros / nosotras | demostraremos |
| vosotros / vosotras | demostraréis |
| ellos / ellas / ustedes | demostrarán |
Conjugation guide
Subjunctive forms
Subjunctive forms
Present subjunctive
Use these forms when a current wish, reaction, doubt or another trigger requires the subjunctive.
| Subject | Demostrar |
|---|---|
| yo | demuestre |
| tú | demuestres |
| él / ella / usted | demuestre |
| nosotros / nosotras | demostremos |
| vosotros / vosotras | demostréis |
| ellos / ellas / ustedes | demuestren |
Conjugation guide
Commands
Commands
Affirmative commands
Choose the affirmative command of demostrar that matches the person being addressed.
| Subject | Demostrar |
|---|---|
| tú | demuestra |
| usted | demuestre |
| nosotros / nosotras | demostremos |
| vosotros / vosotras | demostrad |
| ustedes | demuestren |
Commands
Negative commands
Use no with the matching command form of demostrar.
| Subject | Demostrar |
|---|---|
| tú | no demuestres |
| usted | no demuestre |
| nosotros / nosotras | no demostremos |
| vosotros / vosotras | no demostréis |
| ustedes | no demuestren |
Verified context
Examples with demostrar
Él no demuestra su edad.
He doesn't look his age.
Tatoeba example · CC BY 2.0 FREste hecho demuestra su inocencia.
This fact proves her innocence.
Tatoeba example · CC BY 2.0 FREl pueblo demostró toda su cólera durante las elecciones presidenciales.
The town showed their anger during the presidential elections.
Tatoeba example · CC BY 2.0 FR
Quick answers
Demostrar FAQ
What does demostrar mean?
Demostrar means to show, to demonstrate.
Is demostrar regular or irregular?
Demostrar is a irregular -AR verb.
What is the gerund of demostrar?
The gerund of demostrar is demostrando.
What is the past participle of demostrar?
The past participle of demostrar is demostrado.
How is demostrar conjugated in the present?
The verified public subject set is demuestro, demuestras, demuestra, demostramos, demuestran.
How is demostrar conjugated in the preterite?
The verified public subject set is demostré, demostraste, demostró, demostramos, demostraron.
Created by Alejandro Ruiz, an experienced Spanish tutor.