Portuguese Relative Clause Rules and Examples with “Que” and “Onde”

Introduction

This article explains Portuguese relative clause rules using the two most common relative words: que and onde. Aimed at English-speaking learners, it shows how to form and use relative clauses in Brazilian Portuguese with clear examples, step-by-step explanations, and notes about natural usage and common pitfalls.

What is a relative clause?

A relative clause gives extra information about a noun without starting a new sentence. In English, relative clauses often use who, which, that, or where. In Brazilian Portuguese, the most frequent connectors are que and onde. Relative clauses can be defining (restrictive) or non-defining (additional info), and Portuguese handles both types with slightly different punctuation and word order.

The basics of que

What que does

Que is the most versatile relative pronoun in Portuguese. It can replace who, whom, which, and that in English. It connects a main noun to a clause that describes or identifies that noun. Que does not change form for gender or number.

When to use que

Use que for people, objects, animals, and abstract ideas. It can introduce both restrictive and non-restrictive clauses. Examples:

O livro que eu li era interessante.
A mulher que fala com você é minha prima.
O problema que discutimos foi resolvido.

Word order and verb agreement

In Portuguese relative clauses with que, the verb in the relative clause agrees with the clause subject, not with the antecedent. Consider:

As crianças que brincam no parque estão felizes.
A criança que brinca no parque está feliz.

Note how brincam vs brinca match the number of the subject inside the relative clause.

Omitting the subject

Sometimes the subject is omitted because it is the same as the antecedent. Portuguese allows this, and que continues to introduce the clause.

Conheci a professora que você mencionou.
Ele comprou o carro que estava à venda.

Object pronouns and clitic placement

When the relative clause has an object pronoun, the pronoun placement follows Portuguese clitic rules. In spoken Brazilian Portuguese, proclisis is common, so pronouns often appear before verbs in subordinate clauses introduced by que.

O livro que eu te dei é seu.
A música que nos chamou ficou no rádio.

Using onde for places

What onde means

Onde is used to introduce relative clauses that refer to places and indicates where something happens. It corresponds to English where and cannot replace people or abstract concepts.

Typical uses and examples

Use onde when the antecedent is a location noun such as cidade, casa, escola, restaurante, lugar, or any expression indicating place.

A casa onde eu nasci fica perto da praia.
O restaurante onde jantamos fecha cedo.
A escola onde estudei mudou de endereço.

Onde versus em que

In many cases onde and the preposition + que combination like em que are both correct, but there are subtle differences. Use onde with fixed location expressions. Use em que when you need to keep the preposition for verbs or when a more formal register is preferred.

A cidade onde moro é pequena.
A cidade em que moro é pequena.

Both sentences are correct. The second sounds slightly more formal and highlights the preposition em.

When onde is incorrect

Do not use onde when the verb in the relative clause requires a preposition other than em. For example, verbs that govern de, para, com, or por need the preposition explicitly stated with que.

O amigo com quem fui ao show ficou doente. (not *O amigo onde fui ao show)
A pessoa de quem falei chegou cedo. (not *A pessoa onde falei)

Use onde only for location contexts that match em/na/no.

Omitting the relative pronoun and using subject-drop

Dropping que in colloquial speech

In informal spoken Brazilian Portuguese, native speakers sometimes drop que when the relative clause follows a direct object or after certain verbs, especially in casual contexts. This is more common with short clauses and spoken registers.

Gosto do livro (que) você me deu.
Vi o filme (que) você recomendou.

Both forms are widely used; including que is safer in formal writing.

Relative pronoun for people: quem and cujo

Although que can refer to people, there are alternatives for specific roles. Use quem when the antecedent is a person and the pronoun includes a preposition. Use cujo to express possession.

O professor com quem falei é simpático.
A mulher cuja casa visitei é médica.

Note that cujo agrees in gender and number with the possessed noun, not the possessor: a pessoa cuja filha estuda aqui.

Commas and non-defining relative clauses

Restrictive versus non-restrictive

Restrictive (defining) relative clauses identify the noun and are not separated by commas. Non-restrictive clauses add extra information about an already identified noun and are set off with commas. Portuguese follows similar punctuation rules to English, but non-restrictive clauses are less frequent in everyday Brazilian Portuguese.

O aluno que estuda passará no exame. (restrictive, no commas)
João, que estuda medicina, mora em São Paulo. (non-restrictive, uses commas)

When using non-restrictive clauses, keep que and add commas around the clause if the extra information is not essential to identify the noun.

Choosing between que and commas

Sometimes native speakers prefer to restructure sentences rather than use commas with long non-restrictive clauses. In formal writing, commas are appropriate and help clarity.

Minha tia, que trabalha no hospital, chegou ontem.
The comma marks additional information about minha tia.

Pronoun retention and preposition placement

When the relative clause requires a preposition

If a verb demands a preposition for its object, you must include it in the relative clause. This affects the choice of relative pronoun: quem after a preposition for people, or preposition + que for things or places.

O amigo com quem viajei é divertido.
A cadeira em que sentei estava quebrada.

Use of prepositional phrases with onde

Because onde already includes the idea of em, avoid doubling prepositions like em onde. Instead, rephrase or use em que if you need the em explicitly:

O restaurante onde comemos foi ótimo. (correct)
O lugar em que estive ontem era tranquilo. (correct)

Examples comparing que and onde

Comparing different relative clauses clarifies how each connector works.

A cidade onde eu cresci mudou muito. (location: where)
A casa que comprei precisa de reformas. (object: that/which)
A pessoa que me ajudou foi muito gentil. (person as subject/object)
O lugar em que combinamos de nos encontrar é no centro. (formal with preposition)

Practical usage and register

Formal vs informal

In formal writing and speech, keep que, use explicit prepositions when necessary, and avoid dropping pronouns. In spoken Brazilian Portuguese, omission and contractions are common, and onde is frequently used for natural-sounding location clauses.

Colloquial contractions and spoken tendencies

Brazilian Portuguese often favors simplification: dropping que, using onde with familiar place nouns, and flexible pronoun placement. However, clear grammar remains important for learners, so practice both formal and informal patterns.

Cultural and usage notes

Brazilian Portuguese speakers value clarity and flow. Relative clauses that are too long or complex may be split into shorter sentences in conversation. Using que is neutral and universally understood across Brazil. Regional dialects may influence frequency of omission, but the grammatical rules presented here apply nationwide.

Common mistakes and how to avoid them

1. Using onde with non-location verbs: remember onde implies place; use preposition + que or quem when required.
2. Omitting prepositions: check verb government. If a verb requires de, para, com, or por, include that preposition in the relative clause.
3. Mixing up commas: decide if the clause is restrictive or non-restrictive to place commas correctly.
4. Forgetting agreement inside the relative clause: verbs agree with their subject inside the clause, not with the antecedent.

More example sentences for reference

O filme que assistimos ontem foi emocionante.
A praça onde nos encontramos estava cheia de gente.
A colega de trabalho que conheci na reunião é muito competente.
O livro em que baseei o artigo é antigo.
Minha amiga, que mora no Rio, veio me visitar.
O restaurante com que tive problema mudou de dono.

Conclusion

Mastering que and onde gives you powerful tools to connect ideas in Brazilian Portuguese. Use que for people, things, and abstract concepts, and onde for locations. Pay attention to prepositions, comma usage, and verb agreement inside the relative clause. With exposure to natural speech and written examples, these patterns will become intuitive and help you speak and write more fluently.