Preterite vs Imperfect in Portuguese

In Brief

Use the pretérito perfeito for a past event presented as complete: Saí às oito (“I left at eight”). Use the pretérito imperfeito for habits, descriptions, states, and action already in progress: Chovia quando saí (“It was raining when I left”). In a story, the imperfect often supplies the setting while the preterite advances the events.

Overview

Portuguese does not have one all-purpose simple past. It regularly asks you to choose between the pretérito perfeito simples, usually shortened to perfeito, and the pretérito imperfeito, or imperfeito. Both locate something in the past, but they present it differently. The perfeito looks at an event as a complete whole; the imperfeito looks inside a past situation, without emphasizing its endpoint.

This contrast becomes central around B1 because it shapes nearly every story, memory, and account of past events. You need it to distinguish “I read the book” from “I was reading,” “I lived there for three years” from “I used to live there,” and the event that interrupted a situation from the situation already under way.

English gives useful clues—“used to” and “was doing” often point toward the imperfeito—but there is no mechanical translation rule. English simple past can correspond to either tense: “I knew the answer” is normally Sabia a resposta, while “I found out the answer” is Soube a resposta. The speaker’s view of the event matters more than the English verb form.

How It Works

The central choice

Aspect means the way a speaker presents an action: as complete, ongoing, repeated, or viewed from within. The Portuguese choice is largely a contrast of aspect.

Choose the perfeito when you present…	Choose the imperfeito when you present…
one completed event	an action in progress at a past moment
the beginning or end of a situation	a state or description with no emphasized boundary
a completed number of repetitions	a regular or open-ended past habit
successive events that move a story ahead	the time, weather, setting, or background of a story
a bounded period viewed as finished	a period viewed from inside or as part of “how things were”

A “specific time” is only a clue, not the rule. Às oito, saí uses the perfeito because leaving is a completed event. But Às oito, dormia uses the imperfeito because sleeping was in progress at eight.

Perfeito: the event as a whole

Use the perfeito for a completed action or change:

• Ontem comprei um casaco. — “Yesterday I bought a coat.”
• A reunião começou tarde. — “The meeting started late.”
• De repente, a luz apagou-se. — “Suddenly, the light went out.”

It also links completed events into a sequence:

Cheguei a casa, tirei os sapatos e preparei o jantar.
“I arrived home, took off my shoes, and made dinner.”

A repeated action takes the perfeito when the repetitions are counted or treated as a closed set:

• Telefonei-lhe três vezes. — “I called him/her three times.”
• Na semana passada, fomos ao ginásio todos os dias. — “Last week, we went to the gym every day.”

Imperfeito: inside the past situation

Use the imperfeito for an action that was under way at the reference time:

• À meia-noite, ainda trabalhava. — “At midnight, I was still working.”
• Lia quando o telefone tocou. — “I was reading when the phone rang.”

It also describes repeated habits whose individual endpoints are not important:

• Em criança, passava os verões no Algarve. — “As a child, I used to spend summers in the Algarve.”
• Antes fumava, mas deixei de fumar. — “I used to smoke, but I quit.”

Descriptions and continuing states normally use the imperfeito:

• A rua era estreita e havia pouca luz. — “The street was narrow and there was little light.”
• Estava cansado, então fui-me embora. — “I was tired, so I left.”

Background and event together

The two tenses frequently work as a pair. The imperfeito establishes what was happening or what conditions were like; the perfeito identifies the completed event.

Background in the imperfeito + event in the perfeito

Chovia quando saí.
“It was raining when I left.”

The rain forms the open background. Leaving is the event seen as complete. With two simultaneous ongoing actions, both can be imperfect:

Enquanto eu cozinhava, a Ana punha a mesa.
“While I was cooking, Ana was setting the table.”

With successive completed actions, both are perfect:

Quando cheguei, abri a janela.
“When I arrived, I opened the window.”

Do not assume that quando (“when”) automatically selects one tense. The intended relationship decides: quando era criança describes a past period, while quando cheguei names a completed arrival.

Forms at a glance

The contrast depends on meaning, but you must also recognize the forms. Here are complete regular patterns:

Person	falar, perfeito	falar, imperfeito	comer, perfeito	comer, imperfeito	partir, perfeito	partir, imperfeito
eu	falei	falava	comi	comia	parti	partia
tu	falaste	falavas	comeste	comias	partiste	partias
ele/ela/você	falou	falava	comeu	comia	partiu	partia
nós	falámos	falávamos	comemos	comíamos	partimos	partíamos
vós	falastes	faláveis	comestes	comíeis	partistes	partíeis
eles/elas/vocês	falaram	falavam	comeram	comiam	partiram	partiam

The table follows European Portuguese spelling in falámos. Brazilian Portuguese normally writes falamos for both the present and the preterite; context distinguishes them. The vós forms are uncommon in ordinary conversation but remain useful for recognition.

Many frequent perfeito forms are irregular: fui (from ir or ser), tive, estive, fiz, disse, vim, pude, pus, soube, and trouxe. The imperfeito is much more regular, though important forms include era (ser), tinha (ter), vinha (vir), and punha (pôr).

Examples in Context

Portuguese	English	Note
Chovia quando saí.	It was raining when I left.	Ongoing background + completed event
Lia quando telefonou.	I was reading when he/she called.	Activity in progress + interruption
Antes fumava. Deixei de fumar há dois anos.	I used to smoke. I quit two years ago.	Former habit + completed change
Estava cansado, então fui-me embora.	I was tired, so I left.	State explaining a completed decision
Quando era criança, brincava aqui todos os dias.	When I was a child, I used to play here every day.	Past period and repeated habit
Ontem brinquei com os meus sobrinhos durante uma hora.	Yesterday I played with my nephews for an hour.	Finished, bounded activity
O café estava cheio e as pessoas falavam alto.	The café was full, and people were speaking loudly.	Description of a scene
Entrámos, encontrámos uma mesa e pedimos dois cafés.	We went in, found a table, and ordered two coffees.	Sequence of completed events
Enquanto estudávamos, os vizinhos ouviam música.	While we were studying, the neighbors were listening to music.	Two simultaneous ongoing activities
Na terça-feira, vi a Marta duas vezes.	On Tuesday, I saw Marta twice.	Counted repetitions in a closed period
Naquela época, via a Marta quase todas as semanas.	At that time, I used to see Marta almost every week.	Open-ended past routine
Morámos no Porto de 2019 a 2022.	We lived in Porto from 2019 to 2022.	Completed, explicitly bounded period
Nessa altura, morávamos perto da estação.	At that time, we lived near the station.	Description of how life was then
Não sabia a resposta, mas depois descobri-a.	I didn’t know the answer, but then I found it out.	Continuing mental state + completed discovery
Eram nove horas quando o comboio chegou.	It was nine o’clock when the train arrived.	Time as background + completed arrival

Common Mistakes

Choosing from the time expression alone

• Wrong: Ontem, às oito, dormi when you mean “I was asleep at eight.”
• Right: Ontem, às oito, dormia.
• Why: A precise clock time does not force the perfeito. The sleep was in progress at that moment. Dormi oito horas would instead present the sleep as a completed whole: “I slept for eight hours.”

Using the perfeito for every English simple past

• Wrong: Quando fui criança, joguei futebol todos os dias for a general childhood routine.
• Right: Quando era criança, jogava futebol todos os dias.
• Why: English simple past often describes a past state or habit. Portuguese normally uses the imperfeito for both here.

Using the imperfeito merely because an event lasted

• Wrong: Vivia em Coimbra durante três anos when the three-year stay is over and viewed as a complete period.
• Right: Vivi em Coimbra durante três anos.
• Why: Duration does not automatically mean “ongoing.” A clearly bounded, completed period normally takes the perfeito. Naquela época, vivia em Coimbra changes the viewpoint and describes the background situation.

Making every verb in a story imperfect

• Wrong: Ontem chegava a casa, abria a porta e encontrava uma encomenda for a sequence of events.
• Right: Ontem cheguei a casa, abri a porta e encontrei uma encomenda.
• Why: A chain of completed events normally uses the perfeito. The imperfeito would make these sound habitual, descriptive, or otherwise dependent on more context.

Treating quando as a tense rule

• Wrong: Memorizing “quando + imperfeito.”
• Right: Quando era criança, lia muito but Quando cheguei, ele saiu.
• Why: Quando can introduce a period, an ongoing situation, or a completed event. Meaning—not the connector by itself—controls the tense.

Confusing sabia and soube

• Wrong: Soube a resposta, por isso respondi logo when you mean that you already knew it.
• Right: Sabia a resposta, por isso respondi logo.
• Why: Sabia describes the state of knowing. Soube often marks the point of learning or finding out: Soube da notícia ontem (“I heard/found out about the news yesterday”).

Usage Notes

Helpful words are signals, not commands

Expressions such as sempre, normalmente, todos os dias, naquela época, and enquanto often accompany the imperfeito because they suggest habits or background. Expressions such as ontem, de repente, uma vez, às três, and durante duas horas often accompany the perfeito because they can bound an event. Yet context can reverse the expectation: Na semana passada, trabalhei todos os dias is a completed set of daily actions, while Às três, trabalhava describes what was in progress.

English “would” can be misleading

For repeated past actions, English “would” can translate the imperfeito: “Every summer we would visit our grandparents” → Todos os verões visitávamos os nossos avós. But English “would” also expresses a hypothetical or future-in-the-past meaning, which Portuguese normally handles with the conditional: Disse que viria (“He said he would come”). Decide whether “would” means repeated behavior before choosing the imperfeito.

European and Brazilian Portuguese

The basic aspect contrast is shared across Portuguese varieties. Differences are more noticeable in surrounding vocabulary, pronoun placement, and occasionally preferred constructions than in the core choice itself. For example, European Portuguese commonly has fui-me embora, while Brazilian Portuguese commonly has fui embora. Either variety still contrasts the complete departure with an imperfect background such as estava cansado.

In Brazilian Portuguese, the progressive construction estava lendo (“was reading”) is especially frequent. European Portuguese often uses estava a ler. The simple imperfect lia can also express an action in progress, as well as a habit, in both varieties; context disambiguates it.

Beyond the Basics / Advanced Use

The same verb can change meaning with the viewpoint

With state and perception verbs, the tense contrast can imply a lexical difference—roughly, a difference in what the verb means in context.

Imperfeito	Typical meaning	Perfeito	Typical meaning
sabia	knew, was aware	soube	found out, learned
conhecia	knew, was acquainted with	conheci	met, got to know
podia	could, was able in general	pude	managed to / had the opportunity on one occasion
queria	wanted; polite softening	quis	wanted or decided on a particular occasion
tinha	had, possessed	tive	had/experienced as a bounded event

These are tendencies created by aspect, not translations to memorize blindly. Negation can make the difference especially important: não podia entrar usually means “I was not allowed/able to enter,” while não pude entrar means “I couldn’t manage to enter” on that occasion.

Imperfeito for politeness and softened intentions

Portuguese sometimes moves a present request or intention into the imperfeito to sound less abrupt:

• Queria um café, se faz favor. — “I’d like a coffee, please.”
• Vinha falar consigo. — “I came/I was hoping to speak with you.”

This is not past narration. The imperfect creates distance and softens the request. English often uses “would like” or a tactful progressive instead.

Narrative effects are choices, not labels attached to events

A speaker can frame the same real-world situation differently. Morei lá dez anos views the ten years as a finished block. Morava lá nessa altura places the listener inside that period. Likewise, an author may occasionally use the imperfeito in vivid storytelling to slow down a scene or present events as unfolding. At B1, use the normal pattern—imperfeito for setting, perfeito for foregrounded events—but remember that advanced narrative style can manipulate viewpoint deliberately.

Do not confuse the simple perfeito with the compound form

The pretérito perfeito composto is formed with present ter + a past participle (a verb form such as falado or feito): tenho trabalhado. Unlike the English present perfect, it often describes an activity repeated or continuing up to the present: Tenho trabalhado muito ultimamente (“I have been working a lot lately”). A single finished event such as “I saw her yesterday” is Vi-a ontem, not normally Tenho-a visto ontem. This is a separate contrast, but its name can easily cause confusion.

Practice Tips

1. Build two versions of one memory. First give the setting with three imperfect forms—weather, age, feelings, routine. Then add three completed events in the perfeito. This trains the tenses as a narrative system rather than as isolated conjugations.
2. Ask two questions for every past verb: “Am I presenting the whole event?” and “Is there an endpoint, count, or completed change?” If yes, try the perfeito. If you are describing what was already happening or how things used to be, try the imperfeito.
3. Collect contrast pairs. Keep pairs such as sabia/soube, morava/morei, and lia/li, with a full sentence for each. The surrounding context is what teaches the distinction.

Related Concepts

• Prerequisite: Imperfect Tense — review the forms used for past habits, states, descriptions, and ongoing background.