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The imperfect tense of regular verbs

The imperfect past tense of the indicative is a verb tense that expresses past actions whose beginning and end are not specific. It is also used to describe the continuity of an action in the past.

Imperfect (pretérito imperfecto): what it expresses

  • Habit in the past (what you regularly did): Antes ayudaba… = “I used to help…”
  • Action in progress in the past (background): Mientras atendía… = “While I was attending to / helping…”
  • Background description (how things were): Había una reunión… = “There was a meeting…”

Key idea: the imperfect answers “what was going on / what used to happen” (not “what happened once and finished”).

How to form it (fast pattern you can trust)

Infinitive Imperfect ending Example
-ar -aba, -abas, -aba, -ábamos, -abais, -aban ayudarayudaba, ayudábamos
-er / -ir -ía, -ías, -ía, -íamos, -íais, -ían atenderatendía, atendíais
  • Don’t invent “-aba” for -er/-ir verbs: atendabaatendía
  • Accent matters: atendía, atendíamos, atendíais

The “duplicate” form: why yo = él/ella in the imperfect

In the imperfect, 1st and 3rd person singular look identical:

Person ayudar atender
yo ayudaba atendía
él/ella/usted ayudaba atendía

Self-check: if you remove the subject, the meaning comes from context: Ayudaba en la oficina = “I/he/she used to help…”

Imperfect vs. preterite: the decision that causes most mistakes

What you mean Use Spanish example Natural English
Routine / repeated past action Imperfect Antes, ayudaba a mis colegas. “I used to help my colleagues.”
Background action in progress Imperfect Mientras atendía el teléfono, llegó la ambulancia. “While I was answering the phone, the ambulance arrived.”
A completed event (one-time, finished) Preterite Llamé al 112. “I called 112.”
  • Signal words for imperfect: antes, siempre, a menudo, todos los días, los domingos, mientras
  • Signal words for one-time events: ayer, una vez, de repente, en ese momento

Mini workflow: how to build the imperfect quickly

  1. Find the infinitive ending: -ar or -er/-ir.
  2. Choose the imperfect set: -aba… or -ía…
  3. Match the person: yo / tú / él / nosotros / vosotros / ellos.
  4. Check accents (especially: -ía, -íamos, -íais).

Meaning in real workplace Spanish (ayudar vs. atender)

  • ayudar = to help (general support): Ayudaba a los clientes a encontrar su talla.
  • atender = to attend to / deal with / serve (clients, patients, calls): Atendía a mucha gente por la mañana.

Quick check: if it’s about customers/patients/phone/email, atender is often the best choice.

  1. For verbs ending in "-ar" add "-aba, -abas, -aba, -ábamos, -abais, -aban".
  2. For verbs ending in "-er/-ir" add "-ía, -ías, -ía, -íamos, -íais, -ían".
Verbo ayudarVerbo atender
Yo ayudaba (I was helping)Yo atendía (I was assisting)
Tú ayudabas (you were helping)Tú atendías (you were assisting)
Él / Ella ayudaba (he / she was helping)Él / Ella atendía (he / she was assisting)
Nosotros / Nosotras ayudábamos (we were helping)Nosotros / Nosotras atendíamos (we were assisting)
Vosotros / Vosotras ayudabais (you all were helping)Vosotros / Vosotras atendíais (you all were assisting)
Ellos / Ellas ayudaban (they were helping)Ellos / Ellas atendían (they were assisting)

 

Exceptions!

  1. The first and third person singular are the same.

Exercise 1: Multiple choice

Instruction: Choose the correct answer

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1. Cuando llamé al 112, la operadora me ____ si había heridos. Cuando llamé al 112, la operadora me preguntaba si había heridos.

When I called 112, the operator ____ me if there were any injured people.

2. Mientras el médico ____, yo preparaba el botiquín de emergencia. Mientras el médico atendía al herido, yo preparaba el botiquín de emergencia.

While the doctor ____, I was preparing the emergency first-aid kit.

3. En la ambulancia, los paramédicos ____ a la señora y le hablaban con calma. En la ambulancia, los paramédicos atendían a la señora y le hablaban con calma.

In the ambulance, the paramedics ____ the lady and were speaking to her calmly.

4. Cuando vivíamos en ese barrio, los bomberos ____ a mucha gente en verano. Cuando vivíamos en ese barrio, los bomberos ayudaban a mucha gente en verano.

When we lived in that neighborhood, the firefighters ____ a lot of people in the summer.

Exercise 2: Rewrite the phrases

Instruction: Rewrite the sentences in the imperfect past: change the verb in parentheses to the correct form (e.g.: I (help) → I was helping).

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  1. Cuando trabajaba en la oficina, yo (ayudar) a mis compañeros con el ordenador.
    ⇒ ____________________________________________________________________________________________________ Example
    Cuando trabajaba en la oficina, yo ayudaba a mis compañeros con el ordenador.
    (When I worked in the office, I used to help my coworkers with the computer.)
  2. De pequeño, tú (atender) a tu abuela todos los domingos.
    ⇒ ____________________________________________________________________________________________________ Example
    De pequeño, tú atendías a tu abuela todos los domingos.
    (When you were little, you used to look after your grandmother every Sunday.)
  3. En el hospital, ella (atender) a los pacientes por la mañana.
    ⇒ ____________________________________________________________________________________________________ Example
    En el hospital, ella atendía a los pacientes por la mañana.
    (At the hospital, she used to see patients in the morning.)
  4. Antes, nosotros (ayudar) en casa después de cenar.
    ⇒ ____________________________________________________________________________________________________ Example
    Antes, nosotros ayudábamos en casa después de cenar.
    (Back then, we used to help out at home after dinner.)

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