Ella VerbsHow to conjugate Alterar in Spanish
To alter Regular AR Verb
At a glance: Alterar (to alter) is a regular -AR verb in Spanish. In the present tense: altero, alteras, altera, alteramos, alteráis, alteran. Because it is fully regular, its endings apply directly to hundreds of other -AR verbs.
Table of Contents
- Introduction
- Indicative tenses of Alterar
- Alterar in the Indicative Present
- Alterar in the Indicative Preterite
- Alterar in the Indicative Imperfect
- Alterar in the Indicative Present Continuous
- Alterar in the Indicative Informal Future
- Alterar in the Indicative Future
- Alterar in the Indicative Conditional
- Alterar in the Indicative Present Perfect
- Alterar in the Indicative Past Perfect
- Alterar in the Indicative Future Perfect
- Alterar in the Indicative Conditional Perfect
- Subjunctive tenses of Alterar
- Imperative tenses of Alterar
- Frequently asked questions
- Downloadable cheat sheet (PDF)
- Practice Alterar conjugations (free mobile app)
Introduction
Alterar is the Spanish verb for "to alter". It is a regular AR verb. Read on below to see how it is conjugated in the 18 major Spanish tenses!
| Item | Spanish | English |
|---|---|---|
| Infinitive | alterar | to alter |
| Past participle | alterado | altered |
| Gerund | alterando | altering |
Indicative Tenses of Alterar
Alterar in the Indicative Present
The Indicative Present of alterar 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, "altero", meaning "I alter".
In Spanish, the Indicative Present is known as "El Presente".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | altero | I alter |
| Tú | alteras | you alter |
| Ella / Él / Usted | altera | s/he alters |
| Nosotras / Nosotros | alteramos | we alter |
| Vosotras / Vosotros | alteráis | you (plural) alter |
| Ellas / Ellos / Ustedes | alteran | they alter |
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Alterar in the Indicative Preterite
The Indicative Preterite of alterar is used to talk about actions completed in the past, at a specific point in time. For example, "alteré", meaning "I altered".
In Spanish, the Indicative Preterite is known as "El Pretérito Indefinido".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | alteré | I altered |
| Tú | alteraste | you altered |
| Ella / Él / Usted | alteró | s/he altered |
| Nosotras / Nosotros | alteramos | we altered |
| Vosotras / Vosotros | alterasteis | you (plural) altered |
| Ellas / Ellos / Ustedes | alteraron | they altered |
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Alterar in the Indicative Imperfect
The Indicative Imperfect of alterar is used to describe regular and repeated actions that happened in the past and descriptions of things you used to do. For example, "alteraba", meaning "I used to alter".
In Spanish, the Indicative Imperfect is known as "El Pretérito Imperfecto".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | alteraba | I used to alter |
| Tú | alterabas | you used to alter |
| Ella / Él / Usted | alteraba | s/he used to alter |
| Nosotras / Nosotros | alterábamos | we used to alter |
| Vosotras / Vosotros | alterabais | you (plural) used to alter |
| Ellas / Ellos / Ustedes | alteraban | they used to alter |
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Alterar in the Indicative Present Continuous
The Indicative Present Continuous of alterar is used to talk about something that is happening continuously or right now. For example, "estoy alterando", meaning "I am altering".
In Spanish, the Indicative Present Continuous is known as "El Presente Progresivo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | estoy alterando | I am altering |
| Tú | estás alterando | you are altering |
| Ella / Él / Usted | está alterando | s/he is altering |
| Nosotras / Nosotros | estamos alterando | we are altering |
| Vosotras / Vosotros | estáis alterando | you (plural) are altering |
| Ellas / Ellos / Ustedes | están alterando | they are altering |
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Alterar in the Indicative Informal Future
The Indicative Informal Future of alterar is used to talk about something that will happen in the future, especially in the near future. For example, "voy a alterar", meaning "I am going to alter".
In Spanish, the Indicative Informal Future is known as "El Futuro Próximo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | voy a alterar | I am going to alter |
| Tú | vas a alterar | you are going to alter |
| Ella / Él / Usted | va a alterar | s/he is going to alter |
| Nosotras / Nosotros | vamos a alterar | we are going to alter |
| Vosotras / Vosotros | vais a alterar | you (plural) are going to alter |
| Ellas / Ellos / Ustedes | van a alterar | they are going to alter |
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Alterar in the Indicative Future
The Indicative Future of alterar is used to talk about something that will happen in the future. For example, "alteraré", meaning "I will alter".
In Spanish, the Indicative Future is known as "El Futuro Simple".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | alteraré | I will alter |
| Tú | alterarás | you will alter |
| Ella / Él / Usted | alterará | s/he will alter |
| Nosotras / Nosotros | alteraremos | we will alter |
| Vosotras / Vosotros | alteraréis | you (plural) will alter |
| Ellas / Ellos / Ustedes | alterarán | they will alter |
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Alterar in the Indicative Conditional
The Indicative Conditional of alterar is used to talk about something that may happen in the future, hypothesis and probabilities. For example, "alteraría", meaning "I would alter".
In Spanish, the Indicative Conditional is known as "El Condicional Simple".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | alteraría | I would alter |
| Tú | alterarías | you would alter |
| Ella / Él / Usted | alteraría | s/he would alter |
| Nosotras / Nosotros | alteraríamos | we would alter |
| Vosotras / Vosotros | alteraríais | you (plural) would alter |
| Ellas / Ellos / Ustedes | alterarían | they would alter |
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Alterar in the Indicative Present Perfect
The Indicative Present Perfect of alterar 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 alterado", meaning "I have altered".
In Spanish, the Indicative Present Perfect is known as "El Pretérito Perfecto".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | he alterado | I have altered |
| Tú | has alterado | you have altered |
| Ella / Él / Usted | ha alterado | s/he has altered |
| Nosotras / Nosotros | hemos alterado | we have altered |
| Vosotras / Vosotros | habéis alterado | you (plural) have altered |
| Ellas / Ellos / Ustedes | han alterado | they have altered |
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Alterar in the Indicative Past Perfect
The Indicative Past Perfect of alterar is used to talk about actions that happened before another action in the past. For example, "había alterado", meaning "I had altered".
In Spanish, the Indicative Past Perfect is known as "El Pretérito Pluscuamperfecto".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | había alterado | I had altered |
| Tú | habías alterado | you had altered |
| Ella / Él / Usted | había alterado | s/he had altered |
| Nosotras / Nosotros | habíamos alterado | we had altered |
| Vosotras / Vosotros | habíais alterado | you (plural) had altered |
| Ellas / Ellos / Ustedes | habían alterado | they had altered |
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Alterar in the Indicative Future Perfect
The Indicative Future Perfect of alterar is used to talk about something that will have happened in the future after something else has already happened. For example, "habré alterado", meaning "I will have altered".
In Spanish, the Indicative Future Perfect is known as "El Futuro Perfecto".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | habré alterado | I will have altered |
| Tú | habrás alterado | you will have altered |
| Ella / Él / Usted | habrá alterado | s/he will have altered |
| Nosotras / Nosotros | habremos alterado | we will have altered |
| Vosotras / Vosotros | habréis alterado | you (plural) will have altered |
| Ellas / Ellos / Ustedes | habrán alterado | they will have altered |
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Alterar in the Indicative Conditional Perfect
The Indicative Conditional Perfect of alterar is used to talk about something that would have happened in the past but didn’t due to another action. For example, "habría alterado", meaning "I would have altered".
In Spanish, the Indicative Conditional Perfect is known as "El Condicional Perfecto".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | habría alterado | I would have altered |
| Tú | habrías alterado | you would have altered |
| Ella / Él / Usted | habría alterado | s/he would have altered |
| Nosotras / Nosotros | habríamos alterado | we would have altered |
| Vosotras / Vosotros | habríais alterado | you (plural) would have altered |
| Ellas / Ellos / Ustedes | habrían alterado | they would have altered |
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Subjunctive Tenses of Alterar
Alterar 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, "altere", meaning "I alter".
In Spanish, the Subjunctive Present is known as "El Presente de Subjuntivo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | altere | I alter |
| Tú | alteres | you alter |
| Ella / Él / Usted | altere | s/he alters |
| Nosotras / Nosotros | alteremos | we alter |
| Vosotras / Vosotros | alteréis | you (plural) alter |
| Ellas / Ellos / Ustedes | alteren | they alter |
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Alterar 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, "alterara", meaning "I altered".
In Spanish, the Subjunctive Imperfect is known as "El Imperfecto Subjuntivo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | alterara | I altered |
| Tú | alteraras | you altered |
| Ella / Él / Usted | alterara | s/he altered |
| Nosotras / Nosotros | alteráramos | we altered |
| Vosotras / Vosotros | alterarais | you (plural) altered |
| Ellas / Ellos / Ustedes | alteraran | they altered |
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Alterar 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, "alterare", meaning "I will alter".
In Spanish, the Subjunctive Future is known as "El Futuro de Subjuntivo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | alterare | I will alter |
| Tú | alterares | you will alter |
| Ella / Él / Usted | alterare | s/he will alter |
| Nosotras / Nosotros | alteráremos | we will alter |
| Vosotras / Vosotros | alterareis | you (plural) will alter |
| Ellas / Ellos / Ustedes | alteraren | they will alter |
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Alterar 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 alterado", meaning "I have altered".
In Spanish, the Subjunctive Present Perfect is known as "El Pretérito Perfecto de Subjuntivo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | haya alterado | I have altered |
| Tú | hayas alterado | you have altered |
| Ella / Él / Usted | haya alterado | s/he has altered |
| Nosotras / Nosotros | hayamos alterado | we have altered |
| Vosotras / Vosotros | hayáis alterado | you (plural) have altered |
| Ellas / Ellos / Ustedes | hayan alterado | they have altered |
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Alterar 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 alterado", meaning "I had altered".
In Spanish, the Subjunctive Past Perfect is known as "El Pretérito Pluscuamperfecto de Subjuntivo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | hubiera alterado | I had altered |
| Tú | hubieras alterado | you had altered |
| Ella / Él / Usted | hubiera alterado | s/he had altered |
| Nosotras / Nosotros | hubiéramos alterado | we had altered |
| Vosotras / Vosotros | hubierais alterado | you (plural) had altered |
| Ellas / Ellos / Ustedes | hubieran alterado | they had altered |
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Alterar 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 alterado", meaning "I will have altered".
In Spanish, the Subjunctive Future Perfect is known as "El Futuro Perfecto de Subjuntivo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | hubiere alterado | I will have altered |
| Tú | hubieres alterado | you will have altered |
| Ella / Él / Usted | hubiere alterado | s/he will have altered |
| Nosotras / Nosotros | hubiéremos alterado | we will have altered |
| Vosotras / Vosotros | hubiereis alterado | you (plural) will have altered |
| Ellas / Ellos / Ustedes | hubieren alterado | they will have altered |
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Imperative Tenses of Alterar
Alterar in the Imperative Affirmative
The Imperative Affirmative is used to give orders and commands, to tell someone to do something. For example, "altere", meaning "(to you formal) alter!".
In Spanish, the Imperative Affirmative is known as "El Imperativo Afirmativo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | - | - |
| Tú | altera | (to you) alter! |
| Ella / Él / Usted | altere | (to you formal) alter! |
| Nosotras / Nosotros | alteremos | let's alter! |
| Vosotras / Vosotros | alterad | (to you plural) alter! |
| Ellas / Ellos / Ustedes | alteren | (to you plural formal) alter! |
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Alterar in the Imperative Negative
The Imperative Negative is used to give orders and commands, telling someone not to do something. For example, "no altere", meaning "(to you formal) don't alter!".
In Spanish, the Imperative Negative is known as "El Imperativo Negativo".
| Pronoun | Spanish | English |
|---|---|---|
| Yo | - | - |
| Tú | no alteres | (to you) don't alter! |
| Ella / Él / Usted | no altere | (to you formal) don't alter! |
| Nosotras / Nosotros | no alteremos | let's not alter! |
| Vosotras / Vosotros | no alteréis | (to you plural) don't alter! |
| Ellas / Ellos / Ustedes | no alteren | (to you plural formal) don't alter! |
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Frequently asked questions about Alterar
Is alterar a regular or irregular verb?
Alterar is a fully regular -AR verb. It follows the standard -AR conjugation pattern in every tense and mood without any stem changes, spelling changes, or irregular forms. This makes it a model verb for learning the -AR conjugation system.
How do you conjugate alterar in the present tense (presente)?
In the present tense (presente), alterar is conjugated as: yo altero, tú alteras, él/ella/usted altera, nosotros alteramos, vosotros alteráis, ellos/ellas/ustedes alteran. The present tense 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.
How do you conjugate alterar in the preterite (pretérito indefinido)?
In the preterite (pretérito indefinido), alterar is conjugated as: yo alteré, tú alteraste, él/ella/usted alteró, nosotros alteramos, vosotros alterasteis, ellos/ellas/ustedes alteraron. The preterite is used To talk about actions completed in the past, at a specific point in time.
How do you conjugate alterar in the imperfect (pretérito imperfecto)?
In the imperfect (pretérito imperfecto), alterar is conjugated as: yo alteraba, tú alterabas, él/ella/usted alteraba, nosotros alterábamos, vosotros alterabais, ellos/ellas/ustedes alteraban. The imperfect is used To describe regular and repeated actions that happened in the past and descriptions of things you used to do.
How do you conjugate alterar in the future tense (futuro simple)?
In the future tense (futuro simple), alterar is conjugated as: yo alteraré, tú alterarás, él/ella/usted alterará, nosotros alteraremos, vosotros alteraréis, ellos/ellas/ustedes alterarán. The future tense is used To talk about something that will happen in the future.
How do you conjugate alterar in the present subjunctive (subjuntivo presente)?
In the present subjunctive (subjuntivo presente), alterar is conjugated as: yo altere, tú alteres, él/ella/usted altere, nosotros alteremos, vosotros alteréis, ellos/ellas/ustedes alteren. The present subjunctive 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.
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Downloadable cheat sheets
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Want to explore other verb conjugations?
Why not check out Alternar – to alternate or see the complete list of verbs here.
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Alterar: to alter
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