Relative Clauses with Cujo (Possessive)

When a relative clause expresses possession — when English would use whose — Portuguese has a specialised pronoun: cujo, cuja, cujos, cujas. This page focuses on the syntax and structure of clauses built around cujo: word order, what the clause can contain, how it interacts with prepositions, how to stack cujo clauses, and the stylistic register that governs when to use cujo versus the colloquial workarounds. For the forms of cujo themselves and the agreement rule (with the thing possessed, not the possessor), see the dedicated pronoun page. Here we are interested in putting cujo to work inside full sentences.

Cujo is almost absent from casual speech in European Portugal. You will hear it in lectures, read it in newspapers, encounter it in novels, and use it in academic or professional writing. Most spoken Portuguese replaces cujo with a paraphrase built around de quem or a re-phrased sentence. Understanding cujo is essential for reading and formal writing; producing it fluently is a mark of a genuinely advanced learner.

The basic pattern

A cujo clause works like this:

[antecedent] + cujo/a/os/as + [thing possessed] + [rest of clause]

Cujo sits directly in front of the noun it modifies (the thing possessed). That noun is what governs cujo's agreement — masculine or feminine, singular or plural. After the possessed noun comes the rest of the clause: a verb, objects, complements.

Analyse this:

• Antecedent: o escritor (the writer — the possessor)
• cujo: masculine singular, agreeing with...
• Thing possessed: o romance
• Rest of clause: ganhou o prémio

Word order is rigid

Unlike some relative constructions that permit word-order flexibility, cujo clauses follow a strict order: the possessed noun sits immediately after cujo, and the verb comes later. You cannot interpose adjectives or other material between cujo and its noun.

The subject of the relative clause — the thing possessed — appears where subjects normally do, but the preceding cujo forces the writer to bring it forward immediately. This is an important structural fact: cujo cannot be separated from the noun it modifies.

No article around cujo

Cujo is a determiner in its own right. It both relates (like a relative pronoun) and determines (like an article). So:

• No article before cujo.
• No article after cujo (before the noun).

Non-restrictive cujo clauses — the comma pattern

Like other relative clauses, cujo clauses can be restrictive (essential, no commas) or non-restrictive (parenthetical, with commas on both sides). The choice is made on semantic grounds, exactly as with other relatives.

Restrictive cujo — no commas

Non-restrictive cujo — with commas

Proper names, unique entities, and already-identified individuals almost always take non-restrictive cujo clauses. You are not picking out which Pessoa you mean — there is only one.

Cujo and prepositions

This is the trickiest syntactic feature of cujo. The possessed noun can itself be the object of a preposition, or part of a larger noun phrase that requires a preposition. In such cases the preposition precedes the entire cujo phrase:

A mulher, *em cuja casa passámos a noite, é pintora.* (The woman, in whose house we spent the night, is a painter.)

Here, em (in) governs cuja casa. The whole unit em cuja casa sits at the front of the relative clause.

Note how the preposition + cujo package jumps to the front of the relative clause — never stranded at the end, as English can do ("the woman whose house we spent the night in").

Multiple cujos in one sentence

A sentence can contain more than one cujo clause, typically layered into a formal description. The agreement rule applies independently to each one.

Here cujo trabalho (masculine singular) and cujas ideias (feminine plural) both take o professor as their possessor, but each agrees with its own possessed noun. The conjunction e links the two clauses without a repeat of the antecedent.

How cujo differs from English whose

English whose is a single, uninflected word that covers every combination. Portuguese cujo agrees with the possessed noun — so a single English sentence can become four different Portuguese sentences depending on what is possessed.

"The student whose book I lost..." → O aluno *cujo livro perdi... "The student *whose pen I found..." → A aluna *cuja caneta encontrei... (changing possessor too) "The author *whose books I read..." → O autor *cujos livros leio... "The house *whose windows are open..." → A casa *cujas janelas estão abertas...*

English speakers have to learn to automatically identify the possessed noun and agree cujo with it. This is the single most common mistake — English speakers will default to cujo because of the masculine possessor, when the possessed noun is feminine. The agreement is always with the thing possessed.

Register: when to use cujo vs. workarounds

Here is where B2 learners must make editorial decisions. Cujo is formal. In everyday spoken European Portuguese, it is largely absent. Speakers use one of three workarounds:

Workaround 1: de quem (for people)

Compare with the cujo version:

The de quem version is how a native Portuguese speaker typically talks in conversation. It is marginally less precise but completely natural.

Workaround 2: re-phrasing with a possessive

In conversation, Portuguese speakers frequently break what would be a single cujo sentence into two loose clauses connected by pause, intonation, or an "e" (and).

Workaround 3: re-phrasing the sentence entirely

Choose your register. In a university essay, a legal contract, or a literary novel, cujo is the right choice. In an email to a friend or a conversation at lunch, the workarounds sound more natural.

Typical contexts for cujo

• Journalistic profiles: "O Presidente, cuja agenda está repleta, viaja amanhã para Bruxelas."
• Literary descriptions: "A casa, cujas paredes guardavam séculos de história, parecia respirar no silêncio da tarde."
• Academic writing: "Os autores cujas obras fundamentam este estudo..."
• Legal prose: "O réu, cujos direitos foram respeitados ao longo do processo..."

In all these contexts, cujo is not optional elegance — it is the expected form. Using a workaround would mark the writing as too informal.

Subordinate clauses inside cujo clauses

Cujo clauses, like any other clause, can contain further subordinate structures — other relatives, que clauses, infinitive phrases. Portuguese handles this layering gracefully, but the writer must keep track of agreements and antecedents.

These sentences are deliberately complex. Most writers would break them up. But they show that cujo can anchor layered syntax when needed.

A historical and cross-linguistic note

Cujo comes from Latin cuius, the genitive of qui ("who/which"). Spanish preserves cuyo in similar uses. French and Italian have essentially lost the equivalent and paraphrase with dont and di cui. Portuguese retains cujo in formal written use and has not developed a non-formal spoken equivalent — which is why speakers reach for workarounds in conversation. English whose is a distant Germanic relative (from Old English hwæs, genitive of hwā), structurally parallel but uninflected.

This is the deeper reason cujo feels archaic to native speakers: it is a survival from an older case system (the genitive), and the spoken language has moved away from that system toward prepositional phrases.

Common Mistakes

Key Takeaways

• A cujo clause follows the fixed order: possessor + cujo(s)/cuja(s) + thing possessed + verb.
• Cujo agrees with the thing possessed, never with the possessor. Learn to scan right, not left, for agreement.
• There is no article before or after cujo.
• With prepositions, the preposition sits in front of the whole cujo-phrase: em cuja casa, sobre cujo trabalho, com cujas ideias.
• Non-restrictive cujo clauses take commas on both sides; restrictive ones do not.
• In casual spoken European Portuguese, cujo is rare — speakers use de quem (for people) or rephrase. In formal writing, cujo is expected and often required.
• Multiple cujo clauses can share a single antecedent, each agreeing with its own possessed noun.