alterar
Practice-readyto alterar
Follows model
The standard model for regular -ar verbs. Remove -ar and add the present endings: -o, -as, -a, -amos, -áis, -an. Thousands of verbs (hablar, trabajar, amar) conjugate like cortar.
Conjugation
View endings (Guide)Modo
Indicativo
Indicativo
Tiempo
Presente
Presente
Click a tense to switch
Indicativo — Indicativo
Subjuntivo — Subjuntivo
Imperativo — Imperativo
More tenses are rolling out over time. · Full tables for some supported tenses are visible with Pro.
Formas impersonales
These are the non‑finite verb forms used in combinations and constructions.
- Infinitivo — alterar
- Infinitivo compuesto — haber alterado
- Gerundio — alterando
- Gerundio compuesto — habiendo alterado
- Participio — alterado
Recommended next Try Present Subjunctive →
Key forms
yo
altero
tú
alteras
él/ella
altera
Use the present perfect for past actions that have a connection to the present or recent past.
Key forms
yo
he alterado
tú
has alterado
él/ella
ha alterado
Use the preterite to describe completed past actions with a clear beginning or end.
Key forms
yo
alteré
tú
alteraste
él/ella
alteró
Use the imperfect to describe ongoing, habitual, or background actions in the past.
Key forms
yo
alteraba
tú
alterabas
él/ella
alteraba
Use the pluperfect (pluscuamperfecto) for past actions completed before another past action.
Key forms
yo
había alterado
tú
habías alterado
él/ella
había alterado
Use for past-before-past; mainly literary.
Key forms
yo
hube alterado
tú
hubiste alterado
él/ella
hubo alterado
Use the future to express actions that will happen, predictions, or probability.
Key forms
yo
alteraré
tú
alterarás
él/ella
alterará
Use the conditional for hypothetical situations, polite requests, or future in the past.
Key forms
yo
alteraría
tú
alterarías
él/ella
alteraría
Use the future perfect for actions that will have been completed by a future time.
Key forms
yo
habré alterado
tú
habrás alterado
él/ella
habrá alterado
Use the conditional perfect for hypothetical past actions or actions that would have been completed.
Key forms
yo
habría alterado
tú
habrías alterado
él/ella
habría alterado
Use the present subjunctive for wishes, doubts, emotions, and after certain conjunctions.
Key forms
yo
altere
tú
alteres
él/ella
altere
Use for past actions with present relevance in subjunctive contexts.
Key forms
yo
haya alterado
tú
hayas alterado
él/ella
haya alterado
Use for hypothetical or reported past (e.g. Si viviera…).
Key forms
yo
alterara (alterase)
tú
alteraras (alterases)
él/ella
alterara (alterase)
Use for past-before-past in subjunctive contexts.
Key forms
yo
hubiera alterado (hubiese alterado)
tú
hubieras alterado (hubieses alterado)
él/ella
hubiera alterado (hubiese alterado)
Rare; legal/formal style.
Key forms
yo
alterare
tú
alterares
él/ella
alterare
Rare; future perfect in subjunctive contexts.
Key forms
yo
hubiere alterado
tú
hubieres alterado
él/ella
hubiere alterado
Affirmative imperative only. Negative imperative is available as a separate tense.
Key forms
yo
—
tú
altera
él/ella
altere
Negative commands: use No + form (e.g. No hables.).
Key forms
yo
—
tú
alteres
él/ella
altere
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