Saber vs Conhecer | Portuguese (Portugal) Grammar

English makes do with a single verb, to know, and lets context sort out whether you know a fact, a person, a skill, or a place. Portuguese, like every other Romance language, splits that work between two verbs: saber and conhecer. The split is not just stylistic — picking the wrong one is a grammatical error, not a tonal one, and native speakers notice immediately.

The good news: the distinction is clean. Saber is about information — facts, how-to, and the contents of your head. Conhecer is about acquaintance — people you've met, places you've been to, things you're familiar with. One clear rule with a few edge cases and a beautiful tense quirk in the past.

The quick answer

Use saber when you know a fact, a piece of information, or how to do something. Use conhecer when you have met someone, been somewhere, or are familiar with something through experience. If you could rephrase know as have information about, choose saber; if you could rephrase it as be acquainted with, choose conhecer.

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One useful heuristic: saber tends to be followed by a clause (sei que..., sei como..., sei onde...) or by an infinitive (sei nadar). Conhecer is followed by a noun phrase (conheço o João, conheço Évora). If you can say sei que (I know that...), you want saber; if you're pointing to a person, place, or specific work, you want conhecer.

Saber — information and skill

Knowing a fact or piece of information

Saber is the verb for I know that..., I know whether..., I know how..., I know where..., I know when..., I know who... — any time what follows is a clause introducing a piece of information.

Sei que ele já chegou.

I know (that) he's already arrived.

Não sei se ela vem ou não.

I don't know whether she's coming or not.

Sabes onde fica a farmácia mais próxima?

Do you know where the nearest pharmacy is?

Ninguém sabe porque é que o comboio está atrasado.

Nobody knows why the train is late.

Knowing how to do something — saber + infinitive

Saber plus an infinitive means to know how to do something. Portuguese does not add a word for how — the infinitive alone carries the meaning.

Sei falar francês, mas não consigo ler muito bem.

I can speak French (I know how to), but I can't read very well.

Os teus filhos já sabem nadar?

Do your kids know how to swim yet?

Não sei cozinhar nada, tirando ovos.

I can't cook anything apart from eggs.

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Don't confuse saber + infinitive ("know how to") with poder + infinitive ("be able to / be allowed to"). Sei nadar means I've learned to swim; posso nadar means I'm allowed/physically able to swim right now (the pool is open; my leg isn't broken). English can collapses both: "I can swim" is ambiguous between skill and permission, but Portuguese keeps them apart.

Knowing a fact as a direct object

Sometimes the fact is a simple noun — a piece of data, an answer, a phone number.

Sabes a resposta?

Do you know the answer?

Ele sabe todas as capitais da Europa de cor.

He knows all the capitals of Europe by heart.

Já sabes o resultado do jogo?

Do you already know the result of the match?

Conhecer — acquaintance and familiarity

Knowing a person

When you know someone — have met them, are acquainted with them — the verb is conhecer.

Conheço o João desde a escola primária.

I've known João since primary school.

Não conheces a minha prima Ana?

Don't you know my cousin Ana?

A minha mãe conhece o dono do café.

My mum knows the owner of the café.

Knowing a place

Having been to a place, being familiar with a city or a neighbourhood, takes conhecer.

Já conheces o Porto? Tens mesmo de ir.

Do you know Porto yet? You really have to go.

Eu conheço Lisboa como a palma da mão.

I know Lisbon like the back of my hand.

Não conheço a zona, tens algum sítio para recomendar?

I don't know the area — is there anywhere you'd recommend?

Being familiar with a work, a brand, a topic

Books, films, songs, authors, brands, theories — anything you're familiar with in the sense of having encountered or dealt with it — takes conhecer.

Conheces aquela canção dos Madredeus?

Do you know that Madredeus song?

Ainda não conheço a obra do Saramago, mas quero começar por *Ensaio sobre a Cegueira*.

I'm not familiar with Saramago's work yet, but I want to start with *Blindness*.

É um tema que conheço bem — trabalhei nisso durante anos.

It's a topic I know well — I worked on it for years.

The preterite twist — meaning changes in the past

Portuguese has a neat pattern where certain verbs take on a different meaning in the preterite (pretérito perfeito simples) than in the present or imperfect. Saber and conhecer are the two classic examples.

Verb	Present / imperfect	Preterite (soube, conheci)
saber	to know (a fact)	to find out, to come to know
conhecer	to know (a person, place)	to meet (for the first time), to visit (for the first time)

The logic is consistent: the preterite marks the moment of entry into the state, not the state itself. Sabia que... is the ongoing state of knowing; soube que... is the single moment you acquired the information.

Saber in the preterite = find out

Soube ontem que a Marta vai mudar de emprego.

I found out yesterday that Marta is changing jobs.

Como é que soubeste?

How did you find out?

Só soube da notícia esta manhã pelo jornal.

I only found out about the news this morning from the paper.

Compare this with the imperfect, which would mean you already knew at the time:

Eu já sabia que ela ia mudar de emprego quando ela me contou.

I already knew she was changing jobs when she told me.

Conhecer in the preterite = meet / visit for the first time

Conheci o meu marido numa festa, há dez anos.

I met my husband at a party, ten years ago.

Conheci Coimbra no verão passado — adorei.

I visited Coimbra (for the first time) last summer — I loved it.

Foi ontem que conheci a tua mãe, não foi?

It was yesterday that I first met your mum, wasn't it?

Compare with the imperfect, which would describe ongoing acquaintance:

Eu já conhecia o Pedro antes de começar a trabalhar aqui.

I already knew Pedro before I started working here.

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This shift is one of the cleanest examples of a broader Portuguese pattern: the preterite marks the onset of a state, the imperfect marks the state itself. The same logic applies to poder (could → managed to), querer (wanted → tried to / refused to), and ter (had → got/received). See the meaning-changes page for the full family.

Comparison table

Context	Verb	Example	English
Knowing a fact / clause	saber	Sei que está a chover.	I know it's raining.
Knowing information (noun)	saber	Sei a resposta.	I know the answer.
Knowing how to do something	saber + inf.	Sei nadar.	I know how to swim.
Knowing a person	conhecer	Conheço o João.	I know João.
Knowing a place	conhecer	Conheço Évora.	I know Évora. / I've been there.
Being familiar with a work / topic	conhecer	Conheço o livro.	I'm familiar with the book.
Finding out (past)	saber (preterite)	Soube ontem.	I found out yesterday.
Meeting for the first time	conhecer (preterite)	Conheci-a em Lisboa.	I met her in Lisbon.
Visiting for the first time	conhecer (preterite)	Conheci Paris em 2015.	I first went to Paris in 2015.

Tricky edge cases

Saber + noun referring to a subject matter

You can saber a subject (sei matemática, sabe inglês), meaning you have a working command of it. With a person or a specific book you would use conhecer.

Sabes matemática? Preciso de ajuda com este exercício.

Do you know maths? I need help with this exercise.

Ele sabe muito bem inglês, trabalhou em Londres dez anos.

He knows English very well — he worked in London for ten years.

Subtle: sei inglês = I have command of English as a system; conheço o inglês britânico = I'm familiar with British English as a variety (having been exposed to it).

"I don't know" as a discourse marker

In conversation, a bare não sei is the all-purpose "I dunno". Não conheço is heard too, but it means I haven't encountered that specifically rather than I have no information.

— Queres ir ao cinema? — Não sei, talvez.

— Do you want to go to the cinema? — I dunno, maybe.

— Conheces aquele restaurante novo? — Não conheço, ainda não fui lá.

— Do you know that new restaurant? — I don't — I haven't been there yet.

Reconhecer — a cousin worth knowing

Reconhecer means to recognise — to realise that you have encountered someone or something before. It belongs in the same family.

Não te reconheci com esse corte de cabelo!

I didn't recognise you with that haircut!

Common mistakes

❌ Sei o João desde a escola.

Incorrect — a person as object requires *conhecer*, not *saber*.

✅ Conheço o João desde a escola.

I've known João since school.

❌ Conheço que ele já chegou.

Incorrect — a *that*-clause always takes *saber*.

✅ Sei que ele já chegou.

I know (that) he's already arrived.

❌ Conheces nadar?

Incorrect — *know how to* (skill) is *saber + infinitive*.

✅ Sabes nadar?

Do you know how to swim?

❌ Sei Lisboa muito bem.

Incorrect — places take *conhecer*.

✅ Conheço Lisboa muito bem.

I know Lisbon very well.

❌ Conheci que ela tinha mudado de emprego ontem.

Incorrect — 'found out' is *saber* in the preterite, not *conhecer*.

✅ Soube ontem que ela tinha mudado de emprego.

I found out yesterday that she had changed jobs.

❌ Sei a tua irmã há anos.

Incorrect — acquaintance with a person takes *conhecer*.

✅ Conheço a tua irmã há anos.

I've known your sister for years.

Key takeaways

Saber = information and know-how. It pairs with clauses (sei que), with infinitives (sei nadar), and with fact-noun objects (sei a resposta).
Conhecer = acquaintance and familiarity. It pairs with people (conheço a Marta), places (conheço Évora), and works/topics (conheço o livro).
In the preterite, saber shifts to find out / come to know and conhecer shifts to meet / visit for the first time. The imperfect keeps the state meaning (sabia, conhecia).
English to know is a trap: always pause to decide whether you're talking about information or acquaintance.