alterar
In the tables below, the stem is shown in black and the ending in purple.
1.Presente
Presente
Habitual actions, general truths, and what's happening now.
| yo | altero |
| tú | alteras |
| él/ella | altera |
| nosotros | alteramos |
| vosotros | alteráis |
| ellos/ellas | alteran |
Ella altera los documentos antes de enviarlos.
She alters the documents before sending them.
Nosotros alteramos la receta para hacerla más saludable.
We alter the recipe to make it healthier.
2.Pretérito Indefinido
Pretérito Indefinido
Completed actions at a specific point in the past.
| yo | alteré |
| tú | alteraste |
| él/ella | alteró |
| nosotros | alteramos |
| vosotros | alterasteis |
| ellos/ellas | alteraron |
El ingeniero alteró el diseño del puente.
The engineer altered the design of the bridge.
Ayer, ellos alteraron el horario de la reunión.
Yesterday, they altered the schedule of the meeting.
3.Imperfecto
Imperfecto
Ongoing or repeated actions in the past, descriptions, and background context.
| yo | alteraba |
| tú | alterabas |
| él/ella | alteraba |
| nosotros | alterábamos |
| vosotros | alterabais |
| ellos/ellas | alteraban |
Cuando era niño, siempre alteraba mis juguetes.
When I was a child, I always altered my toys.
Ella alteraba su voz para sonar diferente.
She altered her voice to sound different.
4.Futuro Simple
Futuro Simple
Future actions, predictions, and speculation about the present.
| yo | alteraré |
| tú | alterarás |
| él/ella | alterará |
| nosotros | alteraremos |
| vosotros | alteraréis |
| ellos/ellas | alterarán |
Mañana, él alterará los planes si es necesario.
Tomorrow, he will alter the plans if necessary.
Nosotros alteraremos el enfoque del proyecto.
We will alter the approach of the project.
5.Condicional
Condicional
Hypothetical situations, polite requests, and future-in-the-past.
| yo | alteraría |
| tú | alterarías |
| él/ella | alteraría |
| nosotros | alteraríamos |
| vosotros | alteraríais |
| ellos/ellas | alterarían |
Yo alteraría el color de la pintura si pudiera.
I would alter the color of the paint if I could.
Ellos alterarían el sistema si hubiera problemas.
They would alter the system if there were problems.
6.Subjuntivo Presente
Subjuntivo Presente
Wishes, doubts, emotions, and subordinate clauses expressing uncertainty.
| yo | altere |
| tú | alteres |
| él/ella | altere |
| nosotros | alteremos |
| vosotros | alteréis |
| ellos/ellas | alteren |
Es importante que ella altere su actitud.
It is important that she alters her attitude.
Espero que ellos alteren sus planes a tiempo.
I hope that they alter their plans on time.
7.Subjuntivo Imperfecto
Subjuntivo Imperfecto
Past subjunctive contexts, hypothetical si-clauses, and polite suggestions.
| yo | alterara |
| tú | alteraras |
| él/ella | alterara |
| nosotros | alteráramos |
| vosotros | alterarais |
| ellos/ellas | alteraran |
Si yo alterara los datos, podría obtener mejores resultados.
If I altered the data, I could get better results.
Si ellos alteraran el diseño, sería más atractivo.
If they altered the design, it would be more attractive.
Related verbs
Common questions
- Is "alterar" regular or irregular in Spanish?
- "alterar" is a regular -ar verb in Spanish. It follows the standard conjugation pattern for -ar verbs.
- How do you conjugate "alterar" in the present tense?
- In the Presente, "alterar" conjugates as: alteras, altero, alteran, and more. See the full table above.
- What is the past tense of "alterar" in Spanish?
- In the Pretérito Indefinido, "alterar" conjugates as: alteraste, alteré, alteraron, and more. See the full table above.
- How common is "alterar" in Spanish?
- "alterar" (to alter, to disturb) is one of the most commonly used verbs in Spanish.