A Crucial Tense in Spanish – What is the Pretérito Imperfecto?

The Pretérito Imperfecto (Imperfect Past Tense) is one of the two main past tenses in Spanish, alongside the Pretérito Indefinido (Simple Past or Preterite). 

It describes actions that were ongoing, habitual, or descriptive in the past. Unlike the Preterite, which focuses on completed actions with clear beginnings and ends, the Imperfect focuses on the background, circumstances, or repetition of past events. 

It paints a picture of the past rather than narrating a sequence of finished actions. When Do We Use It?

The Imperfect is essential for setting the scene and conveying context in the past. You should use it for the following main purposes:

1. Habitual or Repeated Actions: To describe actions that happened regularly or routinely in the past, often translated as “used to” or “would.”
2. Descriptions in the Past: To describe people, places, objects, or states of being in a past setting. This includes telling time, age, and weather.
   • Example (Description): La casa era grande y tenía un jardín. (The house was large and had a garden.)
   • Example (Time): Eran las tres de la tarde. (It was three in the afternoon.)
3. Ongoing Actions (Continuous Events): To describe actions that were happening at a specific time in the past, often interrupted by another event (which is usually expressed in the Preterite).
   • Example: Yo leía un libro cuando sonó el teléfono. (I was reading a book when the phone rang.)
4. Simultaneous Actions: To describe two or more actions that were happening at the same time in the past.
   • Example: Mientras mi madre cocinaba, yo hacía la tarea. (While my mother was cooking, I was doing homework.)

How Do We Use It? (Conjugation)

The conjugation of the Pretérito Imperfecto is highly regular. There are only three irregular verbs.Regular Endings

Pronoun	-AR Verbs (e.g., hablar)	-ER Verbs (e.g., comer)	-IR Verbs (e.g., vivir)
Yo	-aba (hablaba)	-ía (comía)	-ía (vivía)
Tú	-abas (hablabas)	-ías (comías)	-ías (vivías)
Él/Ella/Usted	-aba (hablaba)	-ía (comía)	-ía (vivía)
Nosotros/as	-ábamos (hablábamos)	-íamos (comíamos)	-íamos (vivíamos)
Vosotros/as	-abais (hablabais)	-íais (comíais)	-íais (vivíais)
Ellos/Ellas/Ustedes	-aban (hablaban)	-ían (comían)	-ían (vivían)

• Crucial Rule: Note the accent marks on the first person plural of -AR verbs (hablábamos) and on all forms of -ER and -IR verbs (-ía, –ías, etc.).

Irregular Verbs

Only three verbs are irregular in the Imperfect: Ir (to go), Ser (to be), and Ver (to see).

Pronoun	Ir (to go)	Ser (to be)	Ver (to see)
Yo	iba	era	veía
Tú	ibas	eras	veías
Él/Ella/Usted	iba	era	veía
Nosotros/as	íbamos	éramos	veíamos
Ellos/Ellas/Ustedes	iban	eran	veían

The Equivalent in English

The Pretérito Imperfecto is typically translated into English in three main ways:

1. Simple Past (for description or simple past state):
   • Example: Tenía 10 años. → I was 10 years old.
2. “Used to” (for habitual actions):
   • Example: Íbamos a la playa cada verano. → We used to go to the beach every summer.
3. “Was/Were” + Present Participle (-ing) (for ongoing actions):
   • Example: Bailaban mientras cantábamos. → They were dancing while we were singing.

Basic Grammar Rules and Key Phrases

To help identify when to use the Imperfect, look for the following “trigger” phrases:

Key Spanish Phrase	Translation	Context for Imperfect
Siempre	Always	Habitual past action
Cada día/semana/año	Every day/week/year	Habitual past action
A menudo	Often	Habitual past action
De vez en cuando	From time to time	Habitual past action
Generalmente	Generally	Habitual past action
Mientras	While	Simultaneous/ongoing action
Antes	Before (describing a past state)	Descriptive background

Examples

Type of Use	Spanish Sentence	English Translation
Habitual	Mi abuela nos visitaba los domingos.	My grandmother used to visit us on Sundays.
Description	El perro dormía tranquilamente.	The dog was sleeping peacefully.
Time/Age	Cuando era joven, tenía el pelo rubio.	When I was young, I had blonde hair.
Ongoing Action	Hacía frío y llovía mucho.	It was cold and it was raining a lot.

Practice Exercises

Translate the following sentences from English to Spanish, using the Pretérito Imperfecto where appropriate.

1. I used to live in a small house.
2. She was tall and had green eyes.
3. We would always eat dinner at eight o’clock.
4. While you were studying, I was listening to music.
5. It was four in the morning when the dog was barking.

Why We Need to Use It Often

The Pretérito Imperfecto is frequently used in Spanish because it is the backbone of storytelling and context-setting in the past. Without it, your narratives would be a choppy list of completed events, lacking depth and background.

• It provides narrative richness: It allows speakers to establish the setting (where were they?), the mood (how were they feeling?), and the conditions (what was the weather like?).
• It shows relationships between actions: It clearly contrasts with the Preterite to indicate which action was the background (Imperfect) and which was the main, interrupting event (Preterite). For example: Yo cocinaba (background) cuando tú llegaste (finished action).
• It expresses cultural familiarity: Describing childhood memories, past routines, and how things used to be is fundamental to everyday conversation and requires the Imperfect. Mastering it is key to sounding natural and fluent when recounting past experiences.