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How to conjugate Demostrar in Spanish

To demonstrate, to show, to prove Irregular Verb

Introduction

Demostrar is the Spanish verb for "to demonstrate, to show, to prove". It is an irregular verb. Read on below to see how it is conjugated in the 18 major Spanish tenses!

Similar verbs to demostrar include: mostrar, probar.

ItemSpanishEnglish
Infinitivedemostrarto demonstrate, to show, to prove
Past participledemostradodemonstrated
Gerunddemostrandodemonstrating

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Indicative Tenses of Demostrar

Demostrar in the Indicative Present

The Indicative Present of demostrar is used to talk about situations, events or thoughts that are happening now or in the near future. It is also used to talk about facts and truths. For example, "demuestro", meaning "I demonstrate".

In Spanish, the Indicative Present is known as "El Presente".

PronounSpanishEnglish
Yodemuestro I demonstrate
demuestras you demonstrate
Ella / Él / Usteddemuestra s/he demonstrates, you (formal) demonstrate
Nosotras / Nosotrosdemostramoswe demonstrate
Vosotras / Vosotrosdemostráisyou (plural) demonstrate
Ellas / Ellos / Ustedesdemuestran they demonstrate, you (plural formal) demonstrate

The red dot () above denotes an irregular conjugation.

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Demostrar in the Indicative Preterite

The Indicative Preterite of demostrar is used to talk about actions completed in the past, at a specific point in time. For example, "demostré", meaning "I demonstrated".

In Spanish, the Indicative Preterite is known as "El Pretérito Indefinido".

PronounSpanishEnglish
YodemostréI demonstrated
demostrasteyou demonstrated
Ella / Él / Usteddemostrós/he demonstrated, you (formal) demonstrated
Nosotras / Nosotrosdemostramoswe demonstrated
Vosotras / Vosotrosdemostrasteisyou (plural) demonstrated
Ellas / Ellos / Ustedesdemostraronthey demonstrated, you (plural formal) demonstrated

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Demostrar in the Indicative Imperfect

The Indicative Imperfect of demostrar is used to describe regular and repeated actions that happened in the past and descriptions of things you used to do. For example, "demostraba", meaning "I used to demonstrate".

In Spanish, the Indicative Imperfect is known as "El Pretérito Imperfecto".

PronounSpanishEnglish
YodemostrabaI used to demonstrate
demostrabasyou used to demonstrate
Ella / Él / Usteddemostrabas/he used to demonstrate, you (formal) used to demonstrate
Nosotras / Nosotrosdemostrábamoswe used to demonstrate
Vosotras / Vosotrosdemostrabaisyou (plural) used to demonstrate
Ellas / Ellos / Ustedesdemostrabanthey used to demonstrate, you (plural formal) used to demonstrate

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Demostrar in the Indicative Present Continuous

The Indicative Present Continuous of demostrar is used to talk about something that is happening continuously or right now. For example, "estoy demostrando", meaning "I am demonstrating".

In Spanish, the Indicative Present Continuous is known as "El Presente Progresivo".

PronounSpanishEnglish
Yoestoy demostrandoI am demonstrating
estás demostrandoyou are demonstrating
Ella / Él / Ustedestá demostrandos/he is demonstrating, you (formal) are demonstrating
Nosotras / Nosotrosestamos demostrandowe are demonstrating
Vosotras / Vosotrosestáis demostrandoyou (plural) are demonstrating
Ellas / Ellos / Ustedesestán demostrandothey are demonstrating, you (plural formal) are demonstrating

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Demostrar in the Indicative Informal Future

The Indicative Informal Future of demostrar is used to talk about something that will happen in the future, especially in the near future. For example, "voy a demostrar", meaning "I am going to demonstrate".

In Spanish, the Indicative Informal Future is known as "El Futuro Próximo".

PronounSpanishEnglish
Yovoy a demostrarI am going to demonstrate
vas a demostraryou are going to demonstrate
Ella / Él / Ustedva a demostrars/he is going to demonstrate, you (formal) are going to demonstrate
Nosotras / Nosotrosvamos a demostrarwe are going to demonstrate
Vosotras / Vosotrosvais a demostraryou (plural) are going to demonstrate
Ellas / Ellos / Ustedesvan a demostrarthey are going to demonstrate, you (plural formal) are going to demonstrate

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Demostrar in the Indicative Future

The Indicative Future of demostrar is used to talk about something that will happen in the future. For example, "demostraré", meaning "I will demonstrate".

In Spanish, the Indicative Future is known as "El Futuro Simple".

PronounSpanishEnglish
YodemostraréI will demonstrate
demostrarásyou will demonstrate
Ella / Él / Usteddemostrarás/he will demonstrate, you (formal) will demonstrate
Nosotras / Nosotrosdemostraremoswe will demonstrate
Vosotras / Vosotrosdemostraréisyou (plural) will demonstrate
Ellas / Ellos / Ustedesdemostraránthey will demonstrate, you (plural formal) will demonstrate

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Demostrar in the Indicative Conditional

The Indicative Conditional of demostrar is used to talk about something that may happen in the future, hypothesis and probabilities. For example, "demostraría", meaning "I would demonstrate".

In Spanish, the Indicative Conditional is known as "El Condicional Simple".

PronounSpanishEnglish
YodemostraríaI would demonstrate
demostraríasyou would demonstrate
Ella / Él / Usteddemostrarías/he would demonstrate, you (formal) would demonstrate
Nosotras / Nosotrosdemostraríamoswe would demonstrate
Vosotras / Vosotrosdemostraríaisyou (plural) would demonstrate
Ellas / Ellos / Ustedesdemostraríanthey would demonstrate, you (plural formal) would demonstrate

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Demostrar in the Indicative Present Perfect

The Indicative Present Perfect of demostrar is used to describe actions that started recently (in the past) and are still happening now or things that have been done recently. For example, "he demostrado", meaning "I have demonstrated".

In Spanish, the Indicative Present Perfect is known as "El Pretérito Perfecto".

PronounSpanishEnglish
Yohe demostradoI have demonstrated
has demostradoyou have demonstrated
Ella / Él / Ustedha demostrados/he has demonstrated, you (formal) have demonstrated
Nosotras / Nosotroshemos demostradowe have demonstrated
Vosotras / Vosotroshabéis demostradoyou (plural) have demonstrated
Ellas / Ellos / Ustedeshan demostradothey have demonstrated, you (plural formal) have demonstrated

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Demostrar in the Indicative Past Perfect

The Indicative Past Perfect of demostrar is used to talk about actions that happened before another action in the past. For example, "había demostrado", meaning "I had demonstrated".

In Spanish, the Indicative Past Perfect is known as "El Pretérito Pluscuamperfecto".

PronounSpanishEnglish
Yohabía demostradoI had demonstrated
habías demostradoyou had demonstrated
Ella / Él / Ustedhabía demostrados/he had demonstrated, you (formal) had demonstrated
Nosotras / Nosotroshabíamos demostradowe had demonstrated
Vosotras / Vosotroshabíais demostradoyou (plural) had demonstrated
Ellas / Ellos / Ustedeshabían demostradothey had demonstrated, you (plural formal) had demonstrated

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Demostrar in the Indicative Future Perfect

The Indicative Future Perfect of demostrar is used to talk about something that will have happened in the future after something else has already happened. For example, "habré demostrado", meaning "I will have demonstrated".

In Spanish, the Indicative Future Perfect is known as "El Futuro Perfecto".

PronounSpanishEnglish
Yohabré demostradoI will have demonstrated
habrás demostradoyou will have demonstrated
Ella / Él / Ustedhabrá demostrados/he will have demonstrated, you (formal) will have demonstrated
Nosotras / Nosotroshabremos demostradowe will have demonstrated
Vosotras / Vosotroshabréis demostradoyou (plural) will have demonstrated
Ellas / Ellos / Ustedeshabrán demostradothey will have demonstrated, you (plural formal) will have demonstrated

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Demostrar in the Indicative Conditional Perfect

The Indicative Conditional Perfect of demostrar is used to talk about something that would have happened in the past but didn’t due to another action. For example, "habría demostrado", meaning "I would have demonstrated".

In Spanish, the Indicative Conditional Perfect is known as "El Condicional Perfecto".

PronounSpanishEnglish
Yohabría demostradoI would have demonstrated
habrías demostradoyou would have demonstrated
Ella / Él / Ustedhabría demostrados/he would have demonstrated, you (formal) would have demonstrated
Nosotras / Nosotroshabríamos demostradowe would have demonstrated
Vosotras / Vosotroshabríais demostradoyou (plural) would have demonstrated
Ellas / Ellos / Ustedeshabrían demostradothey would have demonstrated, you (plural formal) would have demonstrated

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Subjunctive Tenses of Demostrar

Demostrar in the Subjunctive Present

The Subjunctive Present is used to talk about situations of uncertainty, or emotions such as wishes, desires and hopes. It differs from the indicative mood due to the uncertainty of the events which are being spoken about. For example, "demuestre", meaning "I demonstrate".

In Spanish, the Subjunctive Present is known as "El Presente de Subjuntivo".

PronounSpanishEnglish
Yodemuestre I demonstrate
demuestres you demonstrate
Ella / Él / Usteddemuestre s/he demonstrates, you (formal) demonstrate
Nosotras / Nosotrosdemostremoswe demonstrate
Vosotras / Vosotrosdemostréisyou (plural) demonstrate
Ellas / Ellos / Ustedesdemuestren they demonstrate, you (plural formal) demonstrate

The red dot () above denotes an irregular conjugation.

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Demostrar in the Subjunctive Imperfect

The Subjunctive Imperfect is used to speak about unlikely or uncertain events in the past or to cast an opinion (emotional) about something that happened in the past. For example, "demostrara", meaning "I demonstrated".

In Spanish, the Subjunctive Imperfect is known as "El Imperfecto Subjuntivo".

PronounSpanishEnglish
YodemostraraI demonstrated
demostrarasyou demonstrated
Ella / Él / Usteddemostraras/he demonstrated, you (formal) demonstrated
Nosotras / Nosotrosdemostráramoswe demonstrated
Vosotras / Vosotrosdemostraraisyou (plural) demonstrated
Ellas / Ellos / Ustedesdemostraranthey demonstrated, you (plural formal) demonstrated

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Demostrar in the Subjunctive Future

The Subjunctive Future is used to speak about hypothetical situations, and actions/events that may happen in the future. For example, "demostrare", meaning "I will demonstrate".

In Spanish, the Subjunctive Future is known as "El Futuro de Subjuntivo".

PronounSpanishEnglish
YodemostrareI will demonstrate
demostraresyou will demonstrate
Ella / Él / Usteddemostrares/he will demonstrate, you (formal) will demonstrate
Nosotras / Nosotrosdemostráremoswe will demonstrate
Vosotras / Vosotrosdemostrareisyou (plural) will demonstrate
Ellas / Ellos / Ustedesdemostrarenthey will demonstrate, you (plural formal) will demonstrate

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Demostrar in the Subjunctive Present Perfect

The Subjunctive Present Perfect is used to describe past actions or events that are still connected to the present day and to speak about an action that will have happened by a certain time in the future. For example, "haya demostrado", meaning "I have demonstrated".

In Spanish, the Subjunctive Present Perfect is known as "El Pretérito Perfecto de Subjuntivo".

PronounSpanishEnglish
Yohaya demostradoI have demonstrated
hayas demostradoyou have demonstrated
Ella / Él / Ustedhaya demostrados/he has demonstrated, you (formal) have demonstrated
Nosotras / Nosotroshayamos demostradowe have demonstrated
Vosotras / Vosotroshayáis demostradoyou (plural) have demonstrated
Ellas / Ellos / Ustedeshayan demostradothey have demonstrated, you (plural formal) have demonstrated

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Demostrar in the Subjunctive Past Perfect

The Subjunctive Past Perfect is used to speak about hypothetical situations, and actions/events that occurred before other actions/events in the past. For example, "hubiera demostrado", meaning "I had demonstrated".

In Spanish, the Subjunctive Past Perfect is known as "El Pretérito Pluscuamperfecto de Subjuntivo".

PronounSpanishEnglish
Yohubiera demostradoI had demonstrated
hubieras demostradoyou had demonstrated
Ella / Él / Ustedhubiera demostrados/he had demonstrated, you (formal) had demonstrated
Nosotras / Nosotroshubiéramos demostradowe had demonstrated
Vosotras / Vosotroshubierais demostradoyou (plural) had demonstrated
Ellas / Ellos / Ustedeshubieran demostradothey had demonstrated, you (plural formal) had demonstrated

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Demostrar in the Subjunctive Future Perfect

The Subjunctive Future Perfect is used to speak about something that will have happened if a hypothetical situations occurs in the future. For example, "hubiere demostrado", meaning "I will have demonstrated".

In Spanish, the Subjunctive Future Perfect is known as "El Futuro Perfecto de Subjuntivo".

PronounSpanishEnglish
Yohubiere demostradoI will have demonstrated
hubieres demostradoyou will have demonstrated
Ella / Él / Ustedhubiere demostrados/he will have demonstrated, you (formal) will have demonstrated
Nosotras / Nosotroshubiéremos demostradowe will have demonstrated
Vosotras / Vosotroshubiereis demostradoyou (plural) will have demonstrated
Ellas / Ellos / Ustedeshubieren demostradothey will have demonstrated, you (plural formal) will have demonstrated

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Imperative Tenses of Demostrar

Demostrar in the Imperative Affirmative

The Imperative Affirmative is used to give orders and commands, to tell someone to do something. For example, "demuestre", meaning "(to you formal) demonstrate!".

In Spanish, the Imperative Affirmative is known as "El Imperativo Afirmativo".

PronounSpanishEnglish
Yo--
demuestra (to you) demonstrate!
Ella / Él / Usteddemuestre (to you formal) demonstrate!
Nosotras / Nosotrosdemostremoslet's demonstrate!
Vosotras / Vosotrosdemostrad(to you plural) demonstrate!
Ellas / Ellos / Ustedesdemuestren (to you plural formal) demonstrate!

The red dot () above denotes an irregular conjugation.

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Demostrar in the Imperative Negative

The Imperative Negative is used to give orders and commands, telling someone not to do something. For example, "no demuestre", meaning "(to you formal) don't demonstrate!".

In Spanish, the Imperative Negative is known as "El Imperativo Negativo".

PronounSpanishEnglish
Yo--
no demuestres (to you) don't demonstrate!
Ella / Él / Ustedno demuestre (to you formal) don't demonstrate!
Nosotras / Nosotrosno demostremoslet's not demonstrate!
Vosotras / Vosotrosno demostréis(to you plural) don't demonstrate!
Ellas / Ellos / Ustedesno demuestren (to you plural formal) don't demonstrate!

The red dot () above denotes an irregular conjugation.

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Download and print a cheat sheet of Demostrar Spanish conjugation tables in image or PDF format:

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