Everything you need to improve your Spanish​

Alertar conjugation

Alertar conjugation - to alert

Table of Contents

Alertar is a Spanish verb which translates into English as “to alert, warn”.

Below are all of the conjugations for alertar in Spanish, in all three moods (indicative/indicativo, subjunctive/subjunctivo and imperative/imperativo) and all of the tenses, for each pronoun.

The vosotros pronoun is mainly used in mainland Spain, and is the informal second-person plural – it could be considered the Spanish version of “y’all”. It is rarely found in Latin America, where ustedes is used instead.

The vos form is used instead of tú in some Spanish speaking countries of South America, especially the Southern Cone (e.g. Argentina and Uruguay) and has a different conjugation.

Alertar Infinitive

English Infinitive to alert, warn
Spanish Infinitive alertar

Alertar Gerund and Past Participle

The gerund (gerundio) is used with the continuous tenses, e.g. present continuous (está alertando) and past continuous (estaba alertando). The easiest way to think of it is the equivalent of english’s -ing form (e.g. alerting).

The past participle (participio) is used with perfect tense ‘haber’ verbs, e.g. he alertado and hubiera alertado. These are the equivalent of English’s ‘have’ (e.g. have alerted).

Gerundio / Gerund  alertando
Participio / Past Participle  alertado

Alertar Indicative Conjugations

The basic form of speech, el indicativo is used for making statements, talking about facts, events and things that are certain and objective.

Alertar Presente / Present

The present tense is as it sounds – it’s for talking about things that are currently going on, which are habitual, or which generally exist. In English, this would be “I alert” or “they alert”.

Pronoun Spanish
Yo alerto
alertas
Él / Ella / Usted alerta
Nosotros / as alertamos
Vosotros / as alertáis
Ellos / Ellas / Ustedes alertan
Vos alertás

Alertar Preterite / Pretérito Indefinido

Your simple past tense, e.g. “I alerted” or “she alerted” in English.

In Spanish, there are two past tenses where just one is used in English; the pretérite infefinido is typically used to refer to a concrete, specific moment in time.

Pronoun Spanish English
Yo alerté I alerted
alertaste You alerted
Él / Ella / Usted alertó He / she / you alerted
Nosotros / as alertamos We alerted
Vosotros / as alertasteis You alerted
Ellos / Ellas / Ustedes alertaron They / you alerted
Vos alertaste You alerted

Alertar Imperfect / Pretérito Imperfecto

The pretérito imperfecto roughly translates as “I was alerting” or “she was alerting” in English, and is typically used to describe things and set a scene, talk about events without a specific timeframe, or talk about habitual events or states in the past.

Pronoun Spanish English
Yo alertaba I was alerting
alertabas You were alerting
Él / Ella / Usted alertaba He was / she was / you were alerting
Nosotros / as alertábamos We were alerting
Vosotros / as alertabais You were alerting
Ellos / Ellas / Ustedes alertaban They / you were alerting
Vos alertabas You were alerting

Alertar Perfect / Perfecto

The perfect tense is for talking about things which happened in the past but are still related to the present or continue into the present.

In English, these use the auxiliary verbs ‘have’ and ‘has’ – i.e. “I have alerted” and “she has alerted”.

Pronoun Spanish English
Yo he alertado I have alerted
has alertado You have alerted
Él / Ella / Usted ha alertado He has / she has / you have alerted
Nosotros / as hemos alertado We have alerted
Vosotros / as habéis alertado You have alerted
Ellos / Ellas / Ustedes han alertado They / you have alerted
Vos has alertado You have alerted

Alertar Conditional / Condicional

The conditional is used in place of the English modal verb “would”, i.e. “I would alert” or “she would alert”. It can be used to talk about hypothetical situations.

Pronoun Spanish Englush
Yo alertaría I would alert
alertarías You would alert
Él / Ella / Usted alertaría He / she / you would alert
Nosotros / as alertaríamos We would alert
Vosotros / as alertaríais You would alert
Ellos / Ellas / Ustedes alertarían They / you would alert
Vos alertarías You would alert

Alertar Future / Futuro

The future tense, simply put, replaces the English modal verb “will” – i.e. “I will alert” or “they will alert”.

It is more commonly used for making a hypothesis about the present. To talk about the future, Spanish speakers frequently use “ir + a + infinivo”, e.g. “van a alertar” means “They are going to alert”.

Pronoun Spanish English
Yo alertaré I will alert
alertarás You will alert
Él / Ella / Usted alertará He / she / you will alert
Nosotros / as alertaremos We will alert
Vosotros / as alertaréis You will alert
Ellos / Ellas / Ustedes alertarán They / you will alert
Vos alertarás You will alert

Alertar Subjunctive Conjugations

Alertar Present Subjunctive / Presente de Subjuntivo

Pronoun Spanish
Yo alerte
alertes
Él / Ella / Usted alerte
Nosotros / as alertemos
Vosotros / as alertéis
Ellos / Ellas / Ustedes alerten
Vos alertes

Alertar Past Subjunctive / Imperfecto de Subjuntivo

There are two ways to form the imperfect subjunctive.

The first option sees verbs ending in -era (for -er and -ir verbs) and -ara (for -ar verbs), while the second sees verbs ending in -ese (for -er and -ir verbs) and -ase (for -ar verbs).

There is no difference between these two forms, and Spanish speakers use them interchangeably.

Pronoun Spanish era/ara Spanish ese/ase
Yo alertara alertase
alertaras alertase
Él / Ella / Usted alertara alertase
Nosotros / as alertáramos alertásemos
Vosotros / as alertarais alertaseis
Ellos / Ellas / Ustedes alertaran alertasen
Vos alertaras alertase

Alertar Future Subjunctive / Futuro de Subjuntivo

The future subjunctive is no longer used in modern-day Spanish, apart from in literary and legal contexts, and there is no need to learn it.

It is formed the same as the past/imperfect subjunctive, but with -e endings instead of -a endings.

Pronoun Spanish
Yo alertare
alertares
Él / Ella / Usted alertare
Nosotros / as alertáremos
Vosotros / as alertareis
Ellos / Ellas / Ustedes alertaren
Vos alertares

Alertar Imperative Conjugations

Used for forming positive and negative commands, e.g. “alert!” and “don’t alert!”.

Pronoun Spanish Affirmative Spanish Negative
alerta no alertes
Él / Ella / Usted alerte no alerte
Nosotros / as alertemos no alertemos
Vosotros / as alertad no alertéis
Ellos / Ellas / Ustedes alerten no alerten
Vos alertá no alertes

Alertar Compound Subjunctive Tenses

Alertar Subjunctive Perfect

Pronoun Spanish
Yo haya alertado
hayas alertado
Él / Ella / Usted haya alertado
Nosotros / as hayamos alertado
Vosotros / as hayáis alertado
Ellos / Ellas / Ustedes hayan alertado
Vos hayas alertado

Alertar Subjunctive Past Perfect

Pronoun Spanish
Yo hubiera alertado / hubiese alertado
hubieras alertado / hubieses alertado
Él / Ella / Usted hubiera alertado / hubiese alertado
Nosotros / as hubiéramos alertado / hubiésemos alertado
Vosotros / as hubierais alertado / hubieseis alertado
Ellos / Ellas / Ustedes hubieran alertado / hubiesen alertado
Vos hubieras alertado / hubieses alertado

Alertar Subjunctive Future Perfect

Pronoun Spanish
Yo hubiere alertado
hubieres alertado
Él / Ella / Usted hubiere alertado
Nosotros / as hubiéremos alertado
Vosotros / as hubiereis alertado
Ellos / Ellas / Ustedes hubieren alertado
Vos hubieres alertado

Alertar Subjective Progressive Perfect

Pronoun Spanish
Yo esté alertando
estés alertando
Él / Ella / Usted esté alertando
Nosotros / as estemos alertando
Vosotros / as estéis alertando
Ellos / Ellas / Ustedes estén alertando
Vos estés alertando

Alertar Subjunctive Past Progressive

Pronoun Spanish
Yo estuviera alertando / estuviese alertando
estuvieras alertando / estuvieses alertando
Él / Ella / Usted estuviera alertando / estuviese alertando
Nosotros / as estuviéramos alertando / estuviésamos alertando
Vosotros / as estuvierais alertando / estuvieseis alertando
Ellos / Ellas / Ustedes estuviera alertando / estuviese alertando
Vos estuvieras alertando / estuvieses alertando

Alertar Subjunctive Future Progressive

Pronoun Spanish
Yo estuviere alertando
estuvieres alertando
Él / Ella / Usted estuviere alertando
Nosotros / as estuviéremos alertando
Vosotros / as estuviereis alertando
Ellos / Ellas / Ustedes estuviere alertando
Vos estuvieres alertando

Alertar Vos Conjugation

Voseo is the practice of using ‘vos’ instead of ‘tú’ as the second-person singular pronoun, and is common throughout much of South America.

There are various versions of ‘voseo’ used throughout the Spanish-speaking world. The conjugations for the most common type – used throughout Argentina, parts of Bolivia, Colombia, Ecuador, Paraguya and Uruguay are below.

The present indicative (presente de indicativo) and affirmative imperative (imperativo) have different conjugations from the tú form, while all other tenses generally use the tú form.

TenseVos Conjugation
Present Indicative
Presente de Indicativo
Vos alertás
Simle Past / Preterite
Preterite de Indicativo
Vos alertaste
Imperfect Past
Preterite Imperfecto de Indicativo
Vos alertabas
Conditional
Condicional
Vos alertarías
Future
Futuro de Indicativo
Vos alertarás
Present Subjunctive
Presente de Subjunctivo
Vos alertes
Imperfect Subjunctive
Imperfecto de Subjunctivo
Vos alertaras / Vos alertase
Affirmative Imperative
Imperativo
Vos alertá
Negative Imperative
Imperativo Negativo
Vos no alertes