Spanish Past Tense Explained: Forms, Rules, and Conjugation

Key takeaways

• Spanish has two main past tenses: the preterite (pretérito indefinido) for completed events, and the imperfect (pretérito imperfecto) for ongoing states, habits, and background description.
• The choice between them is not about when something happened – it is about how the speaker views the action: as a completed event or as an ongoing situation.
• The imperfect has only three irregular verbs (ser, ir, ver); the preterite has many more, including ser/ir which share identical forms.
• Time markers are the fastest guide: ayer, el año pasado, de repente signal the preterite; siempre, todos los días, de niño/a signal the imperfect.

Most learners can conjugate both Spanish past tenses before they can choose between them. The conjugation tables are straightforward to memorize. The harder skill – deciding whether a given sentence calls for the preterite or the imperfect – comes from understanding that the choice reflects how the speaker sees the action, not just when it happened.

That framing is what this article builds toward.

italki connects 10M+ learners with 30,000+ teachers across 150+ languages since 2007. Past tense errors are one of the clearest patterns that a Spanish tutor can catch during storytelling practice and correct before they become ingrained habits.

Why Spanish has two main past tenses

In English, “I was working” and “I worked” sometimes feel interchangeable. In Spanish, they are not. The preterite and the imperfect carve up the past along a conceptual boundary, not a time boundary.

The preterite views an action as complete. It answers: “what happened?” – a specific event that started and ended. The imperfect views a situation as ongoing, habitual, or descriptive. It answers: “what was the situation?” or “what used to happen?”

Tense	View of the action	Core questions answered
Preterite	Completed, bounded	What happened? What did they do?
Imperfect	Ongoing, habitual, descriptive	What was happening? What used to happen? What was it like?

The same moment in time can be described with either tense depending on what the speaker wants to communicate. “Viví en Madrid durante dos años” (preterite: I lived in Madrid for two years – a completed, finished period) versus “Vivía en Madrid” (imperfect: I was living in Madrid – the ongoing situation, used to set background for a story).

This conceptual framing is more useful than memorizing lists of when each tense applies. The lists follow from the framing: any situation that the speaker views as complete takes the preterite; any situation the speaker presents as an ongoing background or repeated pattern takes the imperfect.

The preterite: completed actions and specific moments

The preterite appears in four main situations:

1. A completed action at a specific moment: Llegué a las ocho. (I arrived at eight o’clock.)
2. A sequence of completed events: Salí, fui al mercado y volví. (I left, went to the market, and came back.)
3. An action that interrupts an ongoing situation: Llamó mi madre mientras comía. (My mother called while I was eating.)
4. A completed period or state: Estuvimos en Lima tres semanas. (We were in Lima for three weeks.)

Time markers that signal the preterite:

• ayer (yesterday)
• la semana pasada (last week)
• el año pasado (last year)
• hace + time (hace dos días, two days ago)
• en [year] (en 2019)
• de repente (suddenly)
• entonces (then, at that point)
• por fin (finally)
• una vez (once)

Preterite conjugation: regular verbs

Regular verbs split into two groups: -AR verbs and -ER/-IR verbs. Note the accent marks on first and third person singular – they are required and change pronunciation. For a wider look at verb forms beyond the past, see this guide to Spanish conjugation.

-AR verbs: hablar (to speak)

Person	Form
yo	hablé
tú	hablaste
él / ella / usted	habló
nosotros	hablamos
vosotros	hablasteis
ellos / ellas / ustedes	hablaron

-ER verbs: comer (to eat)

Person	Form
yo	comí
tú	comiste
él / ella / usted	comió
nosotros	comimos
vosotros	comisteis
ellos / ellas / ustedes	comieron

-IR verbs: vivir (to live)

Person	Form
yo	viví
tú	viviste
él / ella / usted	vivió
nosotros	vivimos
vosotros	vivisteis
ellos / ellas / ustedes	vivieron

Note that -ER and -IR regular preterites share the same endings. Also note that -AR nosotros (hablamos) looks identical to the present tense form – context and time markers clarify which tense is intended.

Irregular preterites: the most important ones

The preterite has many irregular verbs. The key ones below cover the situations learners encounter most often.

ser and ir (to be and to go) – share identical forms:

Person	Form
yo	fui
tú	fuiste
él / ella / usted	fue
nosotros	fuimos
vosotros	fuisteis
ellos / ustedes	fueron

Context distinguishes meaning: “Fui al mercado” (I went to the market) vs. “Fui el primero en llegar” (I was the first to arrive).

Other key irregular preterites:

Infinitive	yo form	ellos form	Stem change
tener (to have)	tuve	tuvieron	tuv-
estar (to be)	estuve	estuvieron	estuv-
hacer (to do/make)	hice	hicieron	hic- / hiz-
poder (to be able)	pude	pudieron	pud-
querer (to want)	quise	quisieron	quis-
saber (to know)	supe	supieron	sup-
decir (to say)	dije	dijeron	dij-
venir (to come)	vine	vinieron	vin-
poner (to put)	puse	pusieron	pus-

These irregular preterites use a special set of endings: -e, -iste, -o, -imos, -isteis, -eron (not -aron/ieron). Notice hice – the c changes to z before o (hizo) to maintain the soft sound.

The imperfect: background, habit, and ongoing states

The imperfect covers three main uses that share the same “ongoing or unfinished” quality:

1. Habitual or repeated past actions: De niño, jugaba al fútbol todos los días. (As a child, he used to play football every day.)
2. Ongoing states or descriptions in the past: Era alto y llevaba gafas. (He was tall and wore glasses.)
3. Background action interrupted by a preterite event: Leía cuando sonó el teléfono. (He was reading when the phone rang.)

Time markers that signal the imperfect:

• siempre (always)
• a veces (sometimes)
• normalmente / generalmente (normally / generally)
• de niño/a (as a child)
• todos los días (every day)
• frecuentemente (frequently)
• antes (before, in the old days)
• mientras (while – for the ongoing background action)
• cuando era joven (when I/he/she was young)

Imperfect conjugation and its only three irregular verbs

The imperfect is the easier of the two past tenses to conjugate because almost every verb is regular. Only three common verbs are irregular: ser, ir, and ver.

-AR verbs: hablar

Person	Form
yo	hablaba
tú	hablabas
él / ella / usted	hablaba
nosotros	hablábamos
vosotros	hablabais
ellos / ustedes	hablaban

-ER / -IR verbs: comer / vivir

Person	comer	vivir
yo	comía	vivía
tú	comías	vivías
él / usted	comía	vivía
nosotros	comíamos	vivíamos
vosotros	comíais	vivíais
ellos / ustedes	comían	vivían

The three irregular imperfects:

Infinitive	yo	tú	él/ella	nosotros	vosotros	ellos
ser	era	eras	era	éramos	erais	eran
ir	iba	ibas	iba	íbamos	ibais	iban
ver	veía	veías	veía	veíamos	veíais	veían

Every other Spanish verb follows the -aba/-abas/-aba or -ía/-ías/-ía pattern shown above. This makes the imperfect significantly more learnable than the preterite.

Preterite and imperfect in the same sentence

The clearest way to understand both tenses working together is the interruption pattern: the imperfect sets the background; the preterite delivers the event.

Imperfect (ongoing background)	Preterite (completed event)
Estudiaba (was studying)	cuando llamó su madre (when his mother called)
Dormía (was sleeping)	cuando sonó la alarma (when the alarm went off)
Llovía (it was raining)	cuando salimos (when we left)

The imperfect clause describes what was already happening. The preterite clause names what happened next or what interrupted it.

A second pattern: the imperfect provides description or context, and the preterite narrates the action within that context.

“Cuando era pequeña, vivíamos en un pueblo. Un verano, conocí a mi mejor amiga.” (When I was young, we lived in a small town – imperfect, ongoing situation. One summer, I met my best friend – preterite, specific completed event.)

The moment a sentence shifts from background/description to specific event, the tense shifts from imperfect to preterite. Recognizing that shift is the practical skill to build through conversation practice. A Spanish tutor can listen to a story told in the past tense and identify in real time whether each verb choice reflects the intended meaning.

Mastering Spanish past tenses through real conversation

The conjugation tables in this article are a starting point. The real learning happens when past tense forms are used spontaneously in context – telling a story, describing a trip, recounting what happened yesterday. That is when the preterite/imperfect decision becomes automatic rather than deliberate.

italki is useful here because a teacher can listen to your story and stop at the exact point where the tense choice changes the meaning. Book a trial lesson and use the first session to tell a story about a recent trip, a childhood memory, or a day that went wrong – the past tense context where both tenses appear naturally.

FAQ

What are the two main Spanish past tenses?

The preterite (pretérito indefinido) and the imperfect (pretérito imperfecto). The preterite expresses completed actions; the imperfect expresses ongoing states, habitual actions, and background descriptions.

How do you know when to use the preterite vs. the imperfect?

The key question is how the speaker views the action: as a completed event (preterite) or as an ongoing background or repeated pattern (imperfect). Time markers help: ayer, de repente, and por fin signal the preterite; siempre, todos los días, and mientras signal the imperfect.

Are ser and ir conjugated the same way in the preterite?

Yes. Ser (to be) and ir (to go) share identical preterite forms: fui, fuiste, fue, fuimos, fuisteis, fueron. Context determines which meaning applies.

How many irregular imperfect verbs are there?

Only three: ser (era, eras, era…), ir (iba, ibas, iba…), and ver (veía, veías, veía…). All other Spanish verbs follow the regular -aba or -ía patterns in the imperfect.

What does “mientras” signal about tense choice?

Mientras (while) typically introduces an ongoing background action in the imperfect: “Leía mientras esperaba” (He was reading while he waited). The other action – if it interrupts – takes the preterite: “Leía mientras esperaba cuando llegó el tren” (He was reading while he waited when the train arrived).