Short answer
- Use the imperfect when a past action or state has no sharp beginning or end in the sentence: for habits, descriptions, background, and actions in progress.
- Use the preterite when you are reporting one finished event viewed as complete.
- Regular imperfect endings are the aba set for ar verbs and the ía set for er and ir verbs, with no stem changes in this tense.
- Only three verbs are irregular in the imperfect: ser (era), ir (iba), and ver (veía).
- Natural stories mix the two past tenses: the imperfect paints the scene, and the preterite moves the plot forward.
Introduction
The Spanish imperfect tense lets you describe what life used to be like, what people were doing, and what was happening in the background of a story. If you can use it well, your Spanish stories stop sounding like a list of finished events and start sounding like scenes a listener can picture. This guide gives you the full forms, including the three irregular verbs, the main uses in real storytelling, the contrast with the preterite, the trigger phrases that often point to the imperfect, and two short stories you can use as models for your own writing.
What the Imperfect Does
The imperfect describes habits, ongoing actions, and background conditions in the past. In English it often matches used to, would in the habitual sense, or was plus a verb ending in ing. The Real Academia Española explains the underlying idea through aspect: the imperfect is an imperfective form, so it presents an action in its course, with no reference to its beginning or its end. The preterite is perfective: it shows the situation as a whole and tells you that the action reached its end.
That one idea explains most choices between the two tenses. If the sentence leaves the edges of the action out of view, choose the imperfect. If it closes the action off and reports it as done, choose the preterite.
- Cuando era niño, jugaba en el parque todos los días. When I was a child, I used to play in the park every day.
- Íbamos a la playa cada verano. We used to go to the beach every summer.
Notice that the second example uses the imperfect form íbamos, not a preterite form. A repeated summer trip is a habit, so the imperfect fits even though each single trip, seen alone, did finish. The imperfect presents a series of repeated events as open, while the preterite would present the same series as closed.
The Forms: Regular Verbs
Regular imperfect endings are simple, and there are no stem changes in this tense. Take the stem of the infinitive and add the endings for its group. Verbs ending in ar use one set. Verbs ending in er and ir share the same set.
| Person | hablar (to speak) | comer (to eat) | vivir (to live) |
|---|---|---|---|
| yo | hablaba | comía | vivía |
| tú | hablabas | comías | vivías |
| él, ella, usted | hablaba | comía | vivía |
| nosotros, nosotras | hablábamos | comíamos | vivíamos |
| vosotros, vosotras | hablabais | comíais | vivíais |
| ellos, ellas, ustedes | hablaban | comían | vivían |
Four details save a lot of errors. First, the yo form and the él, ella, usted form are identical for every verb in this tense, so context, or a subject pronoun when you need one, shows who is meant. Second, every er and ir form carries a written accent on the í of the ending: comía, vivíamos, vivían. Third, in the ar set only the nosotros form carries a written accent: hablábamos. Fourth, verbs that change their stem in the present tense do not carry that change into the imperfect: pensar gives pensaba, not piensaba, and dormir gives dormía.
The vosotros forms, hablabais, comíais, and vivíais, are used in Spain for a group addressed informally. In most of Latin America, ustedes with the third person plural form covers that job instead.
The Forms: The Three Irregular Verbs
Only three verbs are irregular in the imperfect: ser, ir, and ver. Every other verb follows the regular pattern above, so these three short paradigms are the whole irregular load of the tense.
| Person | ser (to be) | ir (to go) | ver (to see) |
|---|---|---|---|
| yo | era | iba | veía |
| tú | eras | ibas | veías |
| él, ella, usted | era | iba | veía |
| nosotros, nosotras | éramos | íbamos | veíamos |
| vosotros, vosotras | erais | ibais | veíais |
| ellos, ellas, ustedes | eran | iban | veían |
Ser and ir change their stem completely: era and iba show no trace of the infinitive stem, so they have to be memorized. Ver keeps the e of its stem, giving veía where a purely regular pattern applied to the short stem v would have lost that vowel. Watch the accents: éramos and íbamos carry one in the nosotros form, and every form of ver carries the accent on the í.
Ten Uses of the Imperfect in Real Stories
The uses below cover almost every imperfect verb you will meet in a story. Each use comes with the question it answers, because asking the right question is the fastest way to choose the tense.
- Habitual or repeated actions. Ask: did this happen again and again? Siempre cocinaba los domingos. She always cooked on Sundays.
- Ongoing actions in the past. Ask: was this in progress at that moment? Ella leía cuando llamaste. She was reading when you called.
- Actions interrupted by a finished event. Ask: what was in progress when something else happened? Mientras cenábamos, sonó el teléfono. While we were having dinner, the phone rang.
- Describing people. Ask: what was the person like? Mi abuela era muy trabajadora y amable. My grandmother was very hardworking and kind.
- Describing places, weather, and scenes. Ask: what was it like around the action? Hacía mucho calor y el sol brillaba. It was very hot and the sun was shining.
- Time, age, and background facts. Ask: what time was it, or how old was someone? Eran las tres cuando llegamos. It was three o’clock when we arrived. Cuando tenía ocho años, vivía cerca del mar. When I was eight years old, I lived near the sea.
- Mental and emotional states in the past. Ask: what did someone feel, know, or want at that time? Estaba feliz porque tenía un perrito nuevo. She was happy because she had a new puppy. Sabía la respuesta. She knew the answer.
- Simultaneous actions. Ask: were two things happening at the same time? Mientras yo cocinaba, él veía la televisión. While I was cooking, he was watching television.
- Setting the scene before the main events of a story. Ask: what does the reader need to picture before anything happens? La casa era grande y tenía muchas ventanas. The house was large and had many windows.
- Soft or polite requests. Ask: is the speaker softening a present request by pushing it into the past? Quería un café, por favor. I would like a coffee, please. The Instituto Cervantes lists this courtesy use with the example Quería un jersey rojo, and the Academia notes that it is especially common with querer and desear.
Two further uses are worth knowing. In reported speech after a past verb, the imperfect carries what someone said or thought at that time: Dijo que tenía sueño. He said that he was sleepy. And for an action planned or expected, viewed from a past moment: El tren salía a las ocho, pero lo cancelaron. The train was due to leave at eight, but they canceled it.
Imperfect and Preterite in the Same Story
A good story mixes the two tenses on purpose. The imperfect paints the scene. The preterite moves the plot forward with finished events. The Instituto Cervantes describes the same division: the preterite names the facts that follow one another and carry the story forward, while the imperfect introduces the surrounding circumstances of indefinite duration, which gives it descriptive and explanatory values.
- Llovía mucho aquella tarde. It was raining a lot that afternoon. This is background, so it is imperfect.
- Llovió mucho ayer. It rained a lot yesterday. This is one finished spell of rain, reported as a whole, so it is preterite.
- Vivía en Bogotá cuando conocí a mi esposa. I was living in Bogotá when I met my wife. The living is background, and the meeting is the event that changes the story.
A chain of preterite verbs reads as a sequence, one event after the next. A chain of imperfect verbs does the opposite: it holds the reader inside one scene, with everything happening inside the same frame. Choosing the tense is therefore also choosing how the reader experiences the moment.
One boundary case causes real confusion. A state that lasted for a stated, closed period takes the preterite, because the period closes the state off: Vivió en Bogotá durante tres años. She lived in Bogotá for three years. The Academia notes that the imperfect resists that kind of external time limit on a state. If no measured period closes the state, the imperfect returns: Vivía en Bogotá en esa época. She was living in Bogotá at that time.
A common learner error is to use the preterite for a habit. Saying Cuando era niño, jugué en el parque sounds like one specific game on one specific day, not a childhood habit. If the English version can be rephrased with used to, choose the imperfect.
Two common verbs change their meaning with the tense, and the Academia singles them out. Conocer in the imperfect means to know or be familiar with: Conocía bien la ciudad. I knew the city well. In the preterite it means to meet for the first time, which is why conocí appears in the Bogotá example above. Saber in the imperfect means to know a fact: Sabía la respuesta. In the preterite it means to find out: Supe la respuesta ayer. I found out the answer yesterday. Neither pair breaks the main rule: knowing is an open state, and finding out or meeting is a closed event.
How to Make Fue a la Playa Imperfect
Learners often ask how to turn fue a la playa into the imperfect. The short answer is that you do not convert one form into the other word by word. You choose the form that matches the meaning.
Fue a la playa means he or she went to the beach, one finished trip. Fue is the preterite of ir, and ir and ser share the same preterite forms. The imperfect of ir is iba. So Iba a la playa cada verano means he or she used to go to the beach every summer. If you mean one trip last summer, keep fue. If you mean a repeated trip, or a trip in progress, use iba.
The same logic applies to the English verb told. There is no single imperfect word for told. You pick the verb that fits: decía for was saying or used to say, and contaba for was telling or used to tell a story. Example: Me contaba cuentos cada noche. She used to tell me stories every night.
Imperfect Trigger Words
Trigger words do not force the imperfect, but they often point toward it. The Academia lists frequency adverbs as the most common helpers of the habitual reading, including a menudo, habitualmente, siempre, and nunca, along with the quantifiers cada and todos. Useful signals include siempre (always), nunca (never), todos los días (every day), cada verano (every summer), cada vez que (every time that), por lo general (generally), a menudo (often), mientras (while), and antes (before, in the sense of former habits, as in antes vivía aquí, I used to live here).
Use them as clues, not as rules. A sentence with siempre can still take the preterite if it reports a finished, closed period, and a sentence with no trigger word at all can still need the imperfect if it describes background. Meaning decides, not the trigger word alone. When you are unsure, ask the aspect question instead: is this action shown in its course, or as a whole that reached its end?
Two Short Stories That Use Both Tenses
The first story follows the pattern of childhood habits interrupted by one small event.
Cuando era niño, vivíamos en una ciudad pequeña. Mi abuela era muy trabajadora y amable, y siempre preparaba chocolate caliente cuando hacía frío. Los domingos, íbamos a la casa de mis abuelos y comíamos juntos. Una tarde, mientras cenábamos, sonó el teléfono. Era mi tío, que venía a visitarnos al día siguiente. Al día siguiente, llegó temprano y fuimos todos a la playa.
In that paragraph, the imperfect verbs set the scene and describe habits: era, vivíamos, preparaba, hacía, íbamos, and comíamos. The preterite verbs sonó, llegó, and fuimos report the events that move the story forward. Era appears once more in Era mi tío, because identifying the caller is background information, not a new event.
The second story uses weather and movement as its frame.
Era una mañana de invierno. Hacía frío y el cielo estaba gris. Mi hermana y yo caminábamos hacia la estación porque queríamos visitar a nuestros primos. De repente, empezó a nevar. Los copos caían despacio y la calle se volvía blanca. Corrimos los últimos metros, llegamos a la estación y compramos los billetes justo a tiempo.
Here the frame is era, hacía, estaba, caminábamos, and queríamos, all imperfect. The event that breaks the frame is empezó, in the preterite, and the closing chain corrimos, llegamos, and compramos is preterite too, because those actions follow one another and finish the scene. Caían and se volvía stay in the imperfect, because the snowfall is still the background against which the running happens. Try your own version with the same pattern: three imperfect sentences to set a scene, then two or three preterite sentences for what happened next.
A Related Word: Aunque
Aunque means although, even though, or even if, and it can take either the indicative or the subjunctive. The choice changes the meaning. Use the indicative when the speaker presents the clause as a fact: Aunque llueve, voy al parque. Although it is raining, I am going to the park. Use the subjunctive when the clause is hypothetical: Aunque llueva, iremos al parque. Even if it rains, we will go to the park. In short, although plus a fact usually takes the indicative, and even if plus a possibility usually takes the subjunctive.
Treat that as a strong beginner rule rather than an absolute law. The Instituto Cervantes notes a further case: aunque with the subjunctive can also refer to a situation that has already happened, when the speaker presents it as information already given or known in the conversation. That nuance explains why you will sometimes meet the subjunctive after aunque in sentences about real, known facts.
Common Errors to Watch For
The first error is choosing the tense from the English words instead of from the meaning. English would can mean a habit, which takes the imperfect, or a conditional, which does not. Translate the aspect, not the words. The second error is dropping the written accents: comia without its accent is not a Spanish form, and the accent on the í in the er and ir sets is a reliable signal of an imperfect form. The third error is closing off a state with a measured period while keeping the imperfect, as in the Bogotá example above: a finished total normally takes the preterite.
Practice
- Write three sentences about your childhood using cuando era niño or cuando era niña and an imperfect verb, such as jugaba, leía, vivía, tenía, or iba.
- Write two sentences about a past trip: one with a habit, using iba or visitaba, and one with a single finished event, using fui or visité.
- Rewrite this scene opener twice. First keep everything in the imperfect: Era de noche, llovía, y las calles estaban vacías. Then add two preterite events of your own, on the pattern of De repente, sonó una alarma y un coche llegó a la plaza.
- Read your paragraph aloud and check each past verb: does it describe background or a habit, or report one finished event?
Frequently Asked Questions
What is the difference between the imperfect and the preterite?
The imperfect describes habits, ongoing actions, and background in the past, and presents an action in its course with no reference to its beginning or end. The preterite reports finished events viewed as complete wholes. In a story, the imperfect sets the scene and the preterite moves the plot.
Are there irregular verbs in the imperfect?
Yes, only three: ser, ir, and ver. Their key forms are era for ser, iba for ir, and veía for ver. All other verbs use the regular endings: the aba set for ar verbs and the ía set shared by er and ir verbs. There are no stem changes in this tense.
How do I describe a person in the past?
Use the imperfect of ser, tener, or estar, as the meaning requires: ser for identity and lasting qualities, tener for age and possession, and estar for temporary states. Example: Mi abuela era muy trabajadora y amable. My grandmother was very hardworking and kind.
Can a story use both tenses?
Yes, and most natural stories do. The imperfect sets the scene, describes the people and the weather, and reports habits, while the preterite reports the events that happen inside that scene, one after another.
How do I say the time or an age in the past?
Use the imperfect of ser for clock time, as in Eran las tres, it was three o’clock. Use the imperfect of tener for age, as in Tenía ocho años, I was eight years old. Both are background facts, so both take the imperfect.
Is quería really a past tense in Quería un café?
Grammatically yes, and functionally it is a softener. The courtesy imperfect presents a present request as if it were distanced into the past, which makes it sound gentler than the direct present form quiero. Both the Academia and the Instituto Cervantes list this courtesy use.
What is the imperfect of fue?
There is no imperfect form of the word fue itself, because fue is already a complete preterite form of ir or ser. The imperfect forms you usually want are iba, for ir, as in Iba a la playa cada verano, and era, for ser, as in Era mi tío. Choose by meaning.
Does a trigger word like siempre always mean the imperfect?
No. Trigger words are clues, not rules. Siempre, a menudo, cada, and todos often accompany the habitual imperfect, but a closed and finished period can still take the preterite with the same words. The aspect of the action decides.
Keep reading: How to Learn Spanish Fast and Become Fluent: A Realistic Plan That Actually Works
Keep reading: Que vs Lo Que in Spanish: A Clear Guide With Examples
Sources & references
- Real Academia Española, Nueva gramática de la lengua española, section 23.2, El aspecto verbal. Sus clases. The imperfect is an imperfective form that presents the action in its course, without reference to its beginning or end, while the pretérito perfecto simple is perfective and presents the situation as a whole that reaches its end. Imperfective aspect covers progressive, iterative or cyclic, and continuous readings.
- Real Academia Española, Nueva gramática de la lengua española, section 23.12, El pretérito imperfecto (cantaba) (III). Relevancia del modo de acción. La oposición canté / cantaba. Habitual and cyclic readings, frequency adverbs such as a menudo, siempre, nunca, and por lo general, the quantifiers cada and todos, the open versus closed series contrast, and the progressive reading in sentences such as Cuando sonó el teléfono, Eugenio se levantaba de la cama.
- Real Academia Española, Nueva gramática de la lengua española, section 23.11, El pretérito imperfecto (cantaba) (II). Valores modales del imperfecto. The courtesy imperfect with querer and desear, and the prospective imperfect for planned or announced events, as in Mi avión salía mañana.
- Real Academia Española, Nueva gramática de la lengua española, section 23.9, El pretérito perfecto simple (canté). The perfective form presupposes the initial and final limits of the event, chains of preterite verbs present events in sequence in narration, and the meaning contrast between conocer and saber in perfective and imperfective forms.
- Real Academia Española and Asociación de Academias de la Lengua Española, Diccionario de la lengua española, conjugation tables for hablar, ser, ir, and ver. Full pretérito imperfecto paradigms checked form by form, including hablaba, hablábamos, hablabais, era, éramos, erais, iba, íbamos, ibais, veía, veíamos, and veíais.
- Instituto Cervantes, Centro Virtual Cervantes, Archivo Gramatical de la Lengua Española, category Imperfecto en la narración. In narration the pretérito indefinido names the successive facts that move the account forward, while the pretérito imperfecto introduces the surrounding circumstances of indefinite duration and carries descriptive or explanatory values.
- Instituto Cervantes, Plan Curricular del Instituto Cervantes, Gramática, Inventario B1 and B2, section 9.1.2, Pretérito imperfecto. Descriptive value, interrupted action (Iba por la calle y me encontré con él), the conato use (Iba a salir cuando sonó el teléfono), coincidence with a past action (Cuando llegué, estaba afeitándose), the courtesy use (Quería un jersey rojo), and reported speech (Dijo que tenía sueño).
- Instituto Cervantes, Centro Virtual Cervantes, Archivo Gramatical de la Lengua Española, category on concessive clauses with aunque in the subjunctive. Aunque with the subjunctive can also carry a factual, non hypothetical reading when it presents information as already given or known in the discourse.