Adverbs of Affirmation and Negation | Portuguese (Portugal) Grammar

Adverbs of affirmation, negation, and doubt mark the truth status of what you are saying: yes, definitely, probably, maybe, hardly, no, never. They control the whole epistemic landscape of a sentence. They also, in Portuguese, trigger some of the more subtle grammatical choices in the language — above all the mood split between talvez (which takes the conjuntivo) and se calhar (which takes the indicative), a contrast that is diagnostic of real PT-PT command.

This page covers the affirmative adverbs (sim, pois, claro, de facto), the negatives (não, nem, nem sequer, tampouco), the doubt markers (talvez, se calhar, provavelmente), and the double-negation rule that governs them all.

Affirmation

Sim — yes

The default yes. Short, direct, frequent.

— Vens amanhã? — Sim, às dez.

— Are you coming tomorrow? — Yes, at ten.

Sim, eu sei o que disse.

Yes, I know what I said.

Portuguese also confirms a yes-no question by repeating the verb instead of saying sim. This is idiomatic PT-PT and sounds less clipped.

— Já almoçaste? — Já.

— Have you had lunch? — I have.

— Gostaste do filme? — Gostei.

— Did you like the film? — I did.

Pois — the multi-purpose PT-PT particle

Pois is the Swiss army knife of PT-PT discourse. It operates in at least four distinct modes, and a conversation without it sounds oddly stiff.

Affirmation / agreement — Pois! = Yes, indeed! Exactly!
Continuative / turn-taking — pois é keeps a conversation going, roughly yeah, that's how it is.
Concessive filler — pois… at the start of a reply softens it.
Reinforcing — pois bem = well then, pois claro = of course.

— Está frio, não está? — Pois está!

— It's cold, isn't it? — Yes, it really is!

— A vida está cada vez mais cara. — Pois é.

— Life is getting more and more expensive. — Yeah, tell me about it.

Pois bem, vamos começar a reunião.

Well then, let's start the meeting.

Pois claro que te ajudo, não faltava mais!

Of course I'll help you, that's the least I can do!

💡

Pois has no natural single-word English equivalent. It sits somewhere between yes, indeed, and the conversational yeah. Using it fluently is one of the fastest ways to sound unmistakably Portuguese.

Claro — of course

— Posso levar este livro? — Claro, leva.

— Can I take this book? — Of course, take it.

Claro que sei onde fica a estação!

Of course I know where the station is!

Com certeza, certamente — certainly

Both translate certainly. Com certeza is a ubiquitous spoken reply meaning sure, of course, certainly. Certamente is the single-word -mente adverb, slightly more formal.

— Podes passar-me o sal? — Com certeza.

— Can you pass me the salt? — Sure.

Certamente ele virá à reunião.

He will certainly come to the meeting.

De facto, efetivamente, realmente — really, indeed

These mark that something is confirmed as true or matches expectations.

De facto, não conhecia esse restaurante.

Actually, I didn't know that restaurant.

Ele efetivamente chegou a tempo.

He did indeed arrive on time.

Realmente, o problema é mais complicado do que parecia.

Really, the problem is more complicated than it seemed.

💡

Note the post-AO90 spelling: facto with c, efetivamente without the old c. The first keeps the letter because it is pronounced in Portugal; the second drops it because it is silent.

Também — also, too

Adverb of inclusion. It always agrees with the polarity of the sentence: in an affirmative, também; in a negative, também não or nem (see below).

Eu também vou ao concerto amanhã.

I'm also going to the concert tomorrow.

Ela fala francês e também alemão.

She speaks French and also German.

Negation

Não — the core

Não is both no (as a reply) and not (as a verbal negator). As a verbal negator, it sits immediately before the verb or before the clitic pronoun cluster attached to the verb.

Não sei onde ele mora.

I don't know where he lives.

Não me viste ontem na rua?

Didn't you see me yesterday in the street? (note pre-clitic placement)

— Vens? — Não, hoje não posso.

— Are you coming? — No, today I can't.

When replying no you can echo the verb to match the pois não? / não vou rhythm:

— Compraste o pão? — Não comprei, esqueci-me.

— Did you buy the bread? — I didn't, I forgot.

Nem — nor, not even

Nem has two main uses:

Coordinating negative — nor, not… and… not.
Emphatic — not even, often intensified to nem sequer.

Não quero café nem chá.

I don't want coffee or tea.

Não fala inglês nem francês.

He speaks neither English nor French.

Nem sabia que ele tinha chegado.

I didn't even know he'd arrived.

Ela nem sequer olhou para mim.

She didn't even look at me. (emphatic)

Também não — neither / not either

Use também não to add a negative to a previous negative.

Eu não fumo. — Eu também não.

I don't smoke. — Neither do I.

Ela não veio, e o irmão também não.

She didn't come, and her brother didn't either.

Tampouco / tão-pouco — neither / either (formal)

Tampouco (one word; the older spelling tão-pouco with hyphen still exists) means neither, either in negative contexts. It is more formal than também não, more common in writing, and in speech can sound elevated or bookish.

Ela não concorda com a proposta; tampouco discorda abertamente.

She doesn't agree with the proposal; nor does she openly disagree. (formal)

Não li o livro, tampouco vi o filme.

I didn't read the book, nor did I see the film.

💡

In everyday PT-PT speech, também não is far more natural than tampouco. Reserve tampouco for writing or careful formal speech — otherwise it sounds overdressed.

Double negation: the rule

This is one of the most important grammar points for English-speaking learners. Portuguese requires a pre-verbal não whenever a negative word (nunca, jamais, nada, ninguém, nenhum, nem, nenhures) sits after the verb. When the negative word is before the verb, não drops.

Não vejo ninguém na rua.

I see nobody in the street. (post-verbal negative → não required)

Ninguém veio à festa.

Nobody came to the party. (pre-verbal negative → no não)

Não fiz nada de mal.

I didn't do anything wrong.

Nada o vai demover.

Nothing is going to sway him.

Não vou nunca a esse sítio.

I never go to that place.

Nunca vou a esse sítio.

I never go to that place.

💡

English schoolteachers call "I don't see nobody" a mistake. In Portuguese the equivalent não vejo ninguém is the only correct form. Do not translate structure from English here — translate meaning, and let Portuguese grammar do what it needs.

Doubt

Talvez + conjuntivo

Talvez means maybe, perhaps. It is one of the most reliable conjuntivo triggers in Portuguese: when talvez sits before the verb, the verb goes in the conjuntivo (present conjuntivo for present/future situations, imperfect conjuntivo for past situations).

Talvez ele venha mais tarde.

Maybe he'll come later. (present conjuntivo *venha*)

Talvez esteja a chover quando chegarmos.

Maybe it will be raining when we arrive. (present conjuntivo *esteja*)

Talvez ela já soubesse o que aconteceu.

Maybe she already knew what had happened. (imperfect conjuntivo *soubesse*)

When talvez is placed after the verb, the conjuntivo requirement relaxes and the indicative is used instead — but this post-verbal talvez is much rarer and slightly literary.

Ele vem, talvez, mais tarde.

He'll come, perhaps, later. (post-verbal talvez — indicative allowed)

Se calhar + indicative — the PT-PT everyday maybe

Se calhar literally if it happens — is the PT-PT colloquial workhorse for maybe. Unlike talvez, it takes the indicative, and it sits comfortably in everyday conversation where talvez can feel slightly literary.

Se calhar ele vem mais tarde.

Maybe he'll come later. (se calhar + indicative *vem*)

Se calhar já está em casa.

Maybe she's already home.

Se calhar não valeu a pena comprar bilhete antecipadamente.

Maybe it wasn't worth buying the ticket in advance.

💡

The talvez vs se calhar choice is the single most PT-PT-diagnostic doubt contrast. Talvez + conjuntivo is more neutral and slightly careful; se calhar + indicative is pure everyday PT-PT. A learner who masters both sounds immediately more fluent.

Compare directly

Talvez ele esteja cansado.

Maybe he's tired. (conjuntivo)

Se calhar ele está cansado.

Maybe he's tired. (indicative, colloquial)

Both are correct; the second is what you'll actually hear in a Lisbon café.

Provavelmente, possivelmente, eventualmente

Three -mente doubt adverbs. Provavelmente = probably. Possivelmente = possibly. Eventualmente — and this is a critical false friend — means possibly, in some eventuality, NOT eventually in the English sense of in the end.

Provavelmente vai chover à tarde.

It'll probably rain in the afternoon.

Possivelmente ele já não se lembra.

Possibly he doesn't remember anymore.

Eventualmente podemos mudar de plano.

We could possibly change plans. (NOT 'eventually we'll change plans')

💡

Eventualmente is one of the most dangerous false friends for English speakers. If you want to say eventually, in the end, the Portuguese is no fim, acabar por + infinitive, or por fim. Eventualmente in Portuguese always means possibly.

Acabou por ir ao médico.

He eventually went to the doctor. (not 'eventualmente')

Quiçá, porventura — archaic / formal

Quiçá is a literary perhaps — found in poetry, essays, old-fashioned prose. Porventura is a formal perhaps by chance, similarly archaic in speech but still seen in writing. Both take the conjuntivo.

Quiçá um dia voltemos a encontrar-nos. (literary)

Perhaps one day we will meet again.

Se porventura ele chegar antes, espera por nós. (formal)

If by any chance he arrives early, wait for us.

Affirmation and negation reference table

Portuguese	English	Register	Notes
sim	yes	neutral	or repeat the verb: — Vens? — Vou.
pois	yes / indeed / right	PT-PT colloquial staple	multi-purpose particle
claro	of course	neutral	often claro que sim
com certeza	sure, certainly	neutral	spoken default
certamente	certainly	slightly formal
de facto / efetivamente	indeed, in fact	neutral / slightly formal	AO90 spelling: facto, efetivamente
realmente	really, indeed	neutral
também	also, too	neutral
não	no / not	neutral	pre-verbal for negation
nem	nor, not even	neutral	sequer for emphasis
nem sequer	not even	neutral, emphatic
também não	neither, not either	neutral	default reply to a negative
tampouco	neither, nor	formal	more common in writing
talvez	maybe, perhaps	neutral	conjuntivo (pre-verbal)
se calhar	maybe	PT-PT colloquial	indicative
provavelmente	probably	neutral
possivelmente	possibly	neutral
eventualmente	possibly (false friend!)	neutral	NOT 'eventually' in English sense
quiçá / porventura	perhaps	archaic / literary	conjuntivo

Short reply patterns

Portuguese has well-worn reply patterns that combine yes/no adverbs with verb echoes:

— Queres ir? — Quero, sim.

— Do you want to go? — Yes, I do.

— Conheces a Inês? — Não, não conheço.

— Do you know Inês? — No, I don't.

— Foste ao médico? — Fui, pois.

— Did you go to the doctor? — I did, yes.

— Ela já chegou? — Já, já.

— Has she arrived? — Yes, already.

Echoing the verb rather than just saying sim is the more natural PT-PT answer to most yes-no questions.

Common mistakes

❌ Eu também não fumo também.

Incorrect — don't duplicate *também*. Choose one position, typically after the subject and before the verb complex.

✅ Eu também não fumo.

I don't smoke either.

❌ Ninguém não veio.

Incorrect — when the negative word is pre-verbal (ninguém), do not add *não*.

✅ Ninguém veio.

Nobody came.

❌ Talvez ele vem amanhã.

Wrong mood — pre-verbal *talvez* triggers the conjuntivo: *venha*, not *vem*.

✅ Talvez ele venha amanhã.

Maybe he'll come tomorrow.

❌ Se calhar ele venha amanhã.

Wrong mood — *se calhar* takes the indicative, not the conjuntivo.

✅ Se calhar ele vem amanhã.

Maybe he'll come tomorrow.

❌ Eventualmente vou comprar um carro novo.

English-transfer false friend — *eventualmente* means 'possibly', not 'eventually'. For 'eventually I'll buy a new car' use *acabar por + infinitive* or *um dia destes*.

✅ Um dia destes vou comprar um carro novo.

Eventually I'll buy a new car.

❌ Não vi ninguém não.

Incorrect — only one *não* before the verb. Don't repeat it after.

✅ Não vi ninguém.

I didn't see anybody.

❌ — Vens? — Também.

Incomplete — *também* on its own is not an affirmative reply. You want *também vou* ('me too, I'm going') or *vou também*.

✅ Também vou.

I'm going too.

❌ Ele tampouco vem.

Acceptable in formal writing, but in speech overwhelmingly marked. Use *também não*.

✅ Ele também não vem.

He's not coming either.

Key takeaways

Sim / não are the core yes/no; PT-PT often prefers echoing the verb to answer.
Pois is a uniquely PT-PT particle covering yes, indeed, right, okay then.
Double negation is obligatory when negative adverbs (nunca, nada, ninguém, nem) sit post-verbally: não vejo nada, não veio ninguém. When pre-verbal, no não.
Talvez triggers the conjuntivo; se calhar takes the indicative. This mood split is the sharpest diagnostic of PT-PT competence.
Eventualmente does NOT mean eventually — it means possibly. This is the most dangerous false friend in this family.
Tampouco is formal; in speech, use também não.