alertar Preterite Conjugation
alertar — to alert
The preterite of 'alertar' is regular: alerté, alertaste, alertó, alertamos, alertasteis, alertaron.
alertar Preterite Forms
When to Use the Preterite
Use the preterite to talk about a specific instance when someone was alerted or when an alert was given. It focuses on the completed action of alerting.
Notes on alertar in the Preterite
'Alertar' is a regular -ar verb, so its preterite conjugations follow the standard pattern.
Example Sentences
Yo alerté a los vecinos sobre el incendio.
I alerted the neighbors about the fire.
yo
¿Tú alertaste a seguridad?
Did you alert security?
tú
Ella alertó al equipo sobre el cambio de planes.
She alerted the team about the change of plans.
él/ella/usted
Nosotros alertamos a la oficina central.
We alerted the central office.
nosotros
Ellos alertaron a los servicios de emergencia.
They alerted the emergency services.
ellos/ellas/ustedes
Common Mistakes
Mistake: Using the imperfect instead of the preterite for a single completed action.
Correct: Say 'alerté' (I alerted) for a specific event, not 'alertaba' (I was alerting).
Why: The preterite marks a completed action in the past, while the imperfect describes ongoing or habitual past actions.
Mistake: Missing the accent on 'alertó'.
Correct: The third-person singular form is 'alertó', with an accent on the 'o'.
Why: The accent is crucial for distinguishing the preterite 'él/ella/usted' form from other verb forms and indicates the stressed syllable.
Master Spanish verbs in context
Memorizing tables only gets you so far. Read 200+ illustrated and narrated Spanish stories to see verbs like 'alertar' used naturally — in the tenses you're learning.
Related Tenses
Present
yo: alerto
The present tense (alerto, alertas, alerta, alertamos, alertáis, alertan) describes current actions, habits, or general truths about alerting.
Imperfect
yo: alertaba
The imperfect of 'alertar' (alertaba, alertabas, alertaba, alertábamos, alertabais, alertaban) describes ongoing or habitual past actions of alerting.
Future
yo: alertaré
The future tense (alertaré, alertarás, alertará, alertaremos, alertaréis, alertarán) indicates actions that will happen.
Conditional
yo: alertaría
The conditional of 'alertar' (alertaría, alertarías, alertaría, alertaríamos, alertaríais, alertarían) is used for hypotheticals, polite requests, and future-in-the-past.
Present Subjunctive
yo: alerte
The present subjunctive (alerte, alertes, alertemos, alertéis, alerten) is used after expressions of doubt, desire, emotion, or uncertainty.
Imperfect Subjunctive
yo: alertara
The imperfect subjunctive (alertara/alertase) is used for hypothetical past situations, politeness, or wishes.
Affirmative Imperative
yo: alerta
Use 'alerta' (tú), 'alerte' (usted), 'alertemos' (nosotros), 'alertad' (vosotros), 'alerten' (ustedes) for direct commands.
Negative Imperative
yo: no alertes
Use 'no alertes' (tú), 'no alerte' (usted), 'no alertemos' (nosotros), 'no alertéis' (vosotros), 'no alerten' (ustedes) for negative commands.