Determiners in Fixed Expressions | Portuguese (Brazil) Grammar

By the time you reach B1, you have learned the rules for when to use an article, when to drop it, when a possessive needs o/a in front of it, and how todo agrees with its noun. This page is about the place where those rules stop applying: fixed expressions, where a determiner is welded into the phrase. In an idiom, the determiner is no longer doing live grammatical work — it is part of the lexical chunk, like a fossil. You cannot drop it, pluralize it, or swap it for a synonym without producing something that sounds broken to a Brazilian ear. The single most useful thing this page can teach you is to memorize these phrases whole, determiner and all, rather than trying to build them from rules.

This matters more in Portuguese than in English. English idioms often tolerate the determiner being optional or variable — at home / at the home, every day / each day feel close. In Portuguese the choice is locked: it is às vezes and never a vezes or em vezes; it is todo mundo and never todos os mundos. Learn the chunk, not the rule.

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The test for a frozen determiner: try to change it. If swapping the article, dropping it, or pluralizing the phrase makes a native speaker wince, you are dealing with a fixed expression — store it whole.

The frozen 'a/à' in adverbial phrases

A huge family of Brazilian adverbs is built on the feminine article a — often contracted with the preposition a into the grave-accented à (this is the only productive use of the crase you meet daily). These phrases describe how something is done, and the article inside them has no countable meaning at all.

Às vezes eu acordo de madrugada e não consigo voltar a dormir.

Sometimes I wake up at dawn and can't get back to sleep.

Fica à vontade, a casa é sua.

Make yourself at home — literally 'be at [your] will'.

Não fica andando à toa no centro de madrugada.

Don't go wandering around downtown at night for no reason.

The literal contents are almost untranslatable: às vezes is "at the times," à vontade is "at the will," à toa is roughly "at the futile [thing]." None of them survive translation, and none of them survive having the article removed. You will hear learners say a vezes or em vontade — both are simply wrong. The same goes for à noite (at night), à mão (by hand), à beça (a ton / loads, informal), and à vista (in cash, paid up front).

Prefiro pagar à vista para não pagar juros.

I'd rather pay in cash so I don't pay interest.

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Whenever you meet a manner adverb that starts with à, assume the accent is obligatory and the article is frozen. The grave accent is signaling a hidden a + a contraction — that is why à toa has it but a gente does not.

The article in 'fazer o favor' and verb-plus-noun chunks

Some fixed verbal expressions carry a definite article that you would never predict from the bare grammar. The classic is fazer o favor de — to do the favor of — used both genuinely and, with the right tone, as a sharp command.

Faz o favor de desligar esse celular na hora do jantar.

Do me the favor of turning off that phone at dinnertime. (mildly irritated tone)

Você me faria o favor de fechar a janela?

Would you do me the favor of closing the window? (polite)

Compare fazer questão de (to insist on / make a point of), which freezes with no article, showing that you really cannot guess — you have to learn each one:

Ela faz questão de pagar a conta toda vez.

She insists on paying the bill every time.

Possessives locked into idioms: 'do meu jeito', 'à minha maneira'

Brazilian Portuguese has two everyday expressions for "in my own way," and both freeze a possessive inside them: do meu jeito (informal, the default in speech) and à minha maneira (a touch more formal/literary). Notice that jeito takes the contraction de + o = do, while maneira takes the crase à — the determiner pattern is fixed for each and not interchangeable.

Deixa que eu resolvo isso do meu jeito.

Let me handle this my own way. (informal)

Cada um cria os filhos à sua maneira.

Everyone raises their kids in their own way. (slightly more formal)

Ele faz tudo do jeito dele, não adianta discutir.

He does everything his way — no point arguing. (note 'dele' instead of 'seu' to avoid ambiguity)

For English speakers this is a real point of friction: English says "my way" with a bare possessive, while Portuguese insists on the article-plus-possessive (o meu jeito) baked into the contraction do. Dropping it — de meu jeito — sounds stilted and wrong in Brazil, even though it is grammatical in some formal European registers.

'Cada' idioms: 'cada um', 'cada vez mais', 'cada vez que'

Cada (each) is invariable and never takes an article on its own, but it anchors several high-frequency expressions. Cada um / cada uma means "each one"; cada vez mais / cada vez menos is the standard way to say "more and more / less and less"; cada vez que means "every time that."

Cada um paga a sua parte, combinado?

Each person pays their own share, deal?

O trânsito em São Paulo está cada vez pior.

Traffic in São Paulo is getting worse and worse.

Cada vez que ele liga, é para pedir dinheiro.

Every time he calls, it's to ask for money.

There is also the purely colloquial, exclamatory cada of disbelief — Você ouve cada coisa! ("The things you hear!" / "You hear some things!") — where cada means "such [remarkable]" with an ironic edge. This one is informal and very Brazilian; the determiner carries the whole expressive load.

Acontece cada coisa nessa cidade que ninguém acredita.

The things that happen in this city — nobody would believe it. (informal, expressive)

'Todo' idioms: 'todo mundo', 'o tempo todo', 'de toda forma'

Todo is the richest source of frozen determiners in Brazil, and the placement of the article changes the meaning — exactly the trap covered on the todo-vs-tudo page. Here the chunks are fixed:

todo mundo = everyone (literally "all world," with no article — this is the everyday word, far more common than todos)
o tempo todo = the whole time (article o
- todo after the noun = "entire")
toda hora = constantly / all the time (informal)
de toda forma / de toda maneira / de qualquer forma = anyway, in any case

Todo mundo sabe que ele chega atrasado, ninguém liga mais.

Everyone knows he shows up late — nobody cares anymore.

Fiquei pensando nisso o tempo todo durante a reunião.

I kept thinking about it the whole time during the meeting.

De toda forma, a gente se vê no sábado.

In any case, we'll see each other on Saturday.

The contrast worth burning in: todo mundo (everyone) has no article, while o mundo todo means "the whole world." Drop the article in the second, or add one to the first, and the meaning flips. This is the same logic as todo dia (every day) versus o dia todo (the whole day) — see the dedicated page for the full pattern.

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todo mundo = everyone (no article). o mundo todo = the whole world (article + todo after the noun). The article is the switch.

Demonstratives frozen into discourse markers: 'nessa', 'por isso', 'nisso'

Brazilian speech runs on demonstrative contractions that have hardened into discourse markers. Por isso (because of that / that's why) is the workhorse connector. Nessa (literally em + essa = "in that") shows up in idioms like cair nessa (to fall for it) and entrar nessa (to get into this / go along with it). Nisso (em + isso) often means "at that point / just then" in narration.

Estava chovendo muito, por isso a gente desistiu da praia.

It was raining hard, that's why we gave up on the beach.

Não cai nessa, esse desconto é golpe.

Don't fall for that — that discount is a scam. (informal)

Eu já ia saindo e, nisso, o telefone tocou.

I was just leaving and, right then, the phone rang.

In these the demonstrative is not pointing at anything concrete — isso and essa have bleached into generic "that situation / this business." You cannot swap nessa for naquela or por isso for por aquilo and keep the idiomatic meaning. They are stored as wholes.

Topa ir ao show? — Tô nessa!

Up for going to the show? — I'm in! (informal, 'tô nessa' = I'm in/down)

Common Mistakes

These are the errors English speakers most reliably make once they start "building" idioms from rules instead of memorizing the chunk.

❌ A vezes eu chego tarde.

Incorrect — the frozen adverb needs the contracted article 'às'.

✅ Às vezes eu chego tarde.

Sometimes I arrive late.

❌ Todos os mundos sabem disso.

Incorrect — 'everyone' is the fixed singular chunk 'todo mundo', no article, no plural.

✅ Todo mundo sabe disso.

Everyone knows that.

❌ Vou fazer de meu jeito.

Incorrect — the possessive idiom freezes the article inside the contraction 'do'.

✅ Vou fazer do meu jeito.

I'll do it my own way.

❌ Pensei nisso o todo tempo.

Incorrect — word order and article are fixed: it's 'o tempo todo'.

✅ Pensei nisso o tempo todo.

I thought about it the whole time.

❌ Cada vez mais melhor.

Incorrect — 'cada vez mais' attaches to an adjective/adverb directly, not to a comparative like 'melhor'.

✅ Cada vez melhor.

Better and better. (or: 'cada vez mais difícil' = harder and harder)

Key Takeaways

In idioms, determiners are fossilized: they are part of the lexical chunk, not the output of a live rule. Memorize the whole phrase.
The grave-accented à marks a frozen feminine article inside manner adverbs (às vezes, à vontade, à toa) — the accent is obligatory.
Possessive idioms bake the article into a contraction: do meu jeito, à minha maneira. English-speaker instinct to drop it (de meu jeito) is wrong in Brazil.
Todo idioms hinge on whether the article is present and where it sits: todo mundo (everyone) vs o mundo todo (the whole world).
Bleached demonstratives (por isso, nessa, nisso) work as discourse glue and cannot be swapped for other demonstratives.

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