Formal Possession: Using 'Whose' (Cujo)
cujo to the gender and number of the noun that follows it, never the owner.
Grammar Rule in 30 Seconds
The word 'cujo' acts like 'whose' and must agree in gender and number with the object possessed, not the possessor.
- Cujo always sits between the possessor and the possessed object: O autor cujo livro li.
- It must match the gender and number of the object that follows it: A autora cuja casa visitei.
- Never use an article (o/a/os/as) immediately after 'cujo': Incorrect: Cujo o livro; Correct: Cujo livro.
Overview
The Portuguese relative pronoun cujo is the direct equivalent of the English "whose." It is a formal and sophisticated grammatical tool used to express possession by linking two nouns in a relative clause. Its primary function is to connect a possessor (a person, place, or thing) to something that belongs to it, all within one smooth, consolidated sentence. While you are unlikely to hear cujo in everyday, casual conversation, mastering its use is a hallmark of an advanced speaker and is essential for formal writing, academic contexts, and professional communication in Portuguese.
Think of cujo not just as a word, but as a bridge. It replaces clunkier possessive constructions and creates a more elegant and concise sentence structure. For instance, instead of saying: "I read a book.
Its author is from Angola." (Eu li um livro. O autor do livro é de Angola.), you can use cujo to link these ideas seamlessly: Eu li um livro cujo autor é de Angola. (I read a book whose author is from Angola.). This pronoun is a key element of what are known as adjectival clauses, as it introduces a clause that describes or modifies a noun, much like an adjective would.
At its core, cujo is a relic of Latin grammar that has survived in Romance languages. Its formal nature stems from this classical origin. Understanding cujo is about more than just memorizing a word; it's about understanding how Portuguese builds complex sentences and expresses relationships between ideas with precision.
For a B2 learner, it represents a significant step towards a more native-like command of formal registers.
How This Grammar Works
cujo are governed by two fundamental and non-negotiable rules. Internalizing these is the key to using the pronoun correctly.cujo. Unlike its English counterpart "whose," which never changes, cujo must agree in gender (masculine/feminine) and number (singular/plural) with the noun that immediately follows it—the thing being possessed. The gender and number of the owner (the antecedent) are irrelevant for this agreement.A pesquisadora, cujos artigos foram publicados, apresentará na conferência.(The researcher, whose articles were published, will present at the conference.)
cujos is masculine and plural. Why? Not because of a pesquisadora (the researcher, who is female), but because artigos (articles) is a masculine, plural noun.cujo requires a preposition, that preposition must be placed directly before cujo.a (referir-se a). Therefore, when using cujo, the a moves to the front.O relatório a cujo conteúdo me refiro foi divulgado ontem.(The report to whose content I am referring was released yesterday.)
gostar de (to like):Conheci um músico de cujas canções eu gosto muito.(I met a musician whose songs I like a lot.)
eu gosto das canções (de + as). The preposition de is required by the verb, so it relocates to the front of the relative pronoun cujas.a, com, de, em, por, etc.) and is a defining feature of formal Portuguese syntax. Getting it right demonstrates a sophisticated control of the language's structure.Formation Pattern
cujo correctly, you must select one of its four forms based on the gender and number of the noun being possessed. The possessor does not influence the choice of form.
cujo | Masculine | Singular | O documento cujo prazo termina amanhã. (The document whose deadline is tomorrow.) |
cuja | Feminine | Singular | A artista cuja exposição visitei é talentosa. (The artist whose exhibition I visited is talented.) |
cujos | Masculine | Plural | Os funcionários cujos salários foram aumentados. (The employees whose salaries were raised.) |
cujas | Feminine | Plural | A empresa cujas ações estão em alta. (The company whose stocks are rising.) |
cujo by combining two simpler sentences.
Entrevistei o diretor. (I interviewed the director.)
As decisões do diretor são controversas. (The director's decisions are controversial.)
o diretor (masculine, singular)
as decisões (feminine, plural)
cujo form based on the gender and number of the possession.
as decisões is feminine plural, so the correct form is cujas.
cujo form and the possessed noun immediately after the possessor from the first sentence. The rest of the second sentence follows.
Entrevistei o diretor cujas decisões são controversas.
o, a, os, as) after cujo. This is always incorrect. Cujo is a determiner and a pronoun rolled into one; it replaces the article, it doesn't precede it.
O prédio cujo arquiteto é famoso...
O prédio cujo o arquiteto é famoso...
When To Use It
cujo is highly dependent on register, which is the level of formality of your language. It is a tool for specific, non-casual contexts.- Formal and Academic Writing: This is the natural habitat of
cujo. Use it in essays, research papers, legal documents, business proposals, and official reports. It adds precision and a formal tone. For example:A teoria, cujos princípios foram delineados no século XIX, continua relevante.(The theory, whose principles were outlined in the 19th century, remains relevant.)
- Professional Communication: In formal emails, presentations, and reports within a professional setting,
cujois perfectly appropriate and signals a high level of education.Anexei a ata da reunião, em cujas notas você encontrará os próximos passos.(I have attached the meeting minutes, in whose notes you will find the next steps.)
- Journalism and Literature: High-quality newspapers (like Público in Portugal or Folha de S.Paulo in Brazil) and literary works frequently use
cujoto achieve stylistic elegance and informational density.
- Formal Speeches and Presentations: When delivering a prepared speech or a formal presentation, using
cujocorrectly can make your language sound more articulate and authoritative.
cujo is almost exclusively confined to written language and the most formal of speeches. In casual, spoken BP, it is actively avoided.que and a possessive pronoun (dele/dela).- Formal (and written) BP:
O vizinho, cujo cachorro late a noite toda, pediu desculpas. - Spoken, everyday BP:
O vizinho, que o cachorro dele late a noite toda, pediu desculpas.
cujo has a slightly wider range of use and may occasionally appear in semi-formal speech where a BP speaker would not use it. The casual alternative in EP is also different, often using que tem or another phrasing rather than the que o... dele structure.- Spoken, everyday EP:
O vizinho que tem o cão a ladrar a noite toda pediu desculpa.
cujo for contexts where formality and precision are required.Common Mistakes
A empresa cuja resultados... | A empresa cujos resultados... | cujos agrees with resultados (m. pl.), not empresa (f. sg.). |Os escritores cujo livros... | Os escritores cujos livros... | cujos agrees with livros (m. pl.). |Cujo already contains the meaning of the article.- Wrong:
A região cuja a culinária é famosa atrai muitos turistas. - Right:
A região cuja culinária é famosa atrai muitos turistas.
- Wrong:
Este é o projeto cujos resultados dependemos de. - Right:
Este é o projeto de cujos resultados dependemos.(Because onedepende de algo.)
cujo as a Question WordCujo is a relative pronoun, not an interrogative one. It connects clauses; it does not ask questions.- Wrong:
Cujo é este carro?(Whose car is this?) - Right:
De quem é este carro?
Real Conversations
To understand where cujo fits—and where it doesn't—let's look at some real-world scenarios.
Scenario 1
This context is a perfect place for cujo.
Subject
Follow-up: Proposta de ParceriaPrezada Sra. Almeida,
Agradeço a reunião de ontem. Discutimos o projeto da Innovatech, cujos objetivos estão bem alinhados com a nossa estratégia de expansão. Envio, como combinado, o nosso portfólio de projetos similares.
(Dear Ms. Almeida,
Thank you for yesterday's meeting. We discussed Innovatech's project, whose objectives are well-aligned with our expansion strategy. As agreed, I am sending our portfolio of similar projects.)
Scenario 2
A professor discussing history would naturally use cujo.
“...e isso leva-nos à Revolução de 25 de Abril de 1974, um evento após cujo desenrolar Portugal iniciou o seu processo de democratização. As consequências de cujas decisões políticas ainda hoje se sentem...”
(“...and that brings us to the Revolution of April 25, 1974, an event after whose unfolding Portugal began its process of democratization. The consequences of whose political decisions are still felt today...”)
Scenario 3
Here, using cujo would sound unnatural and overly formal. Notice the common workaround.
- Ana: Você viu a nova série daquela diretora espanhola? (Did you see the new series from that Spanish director?)
- Bruno: Qual? Aquela que o marido dela também é ator? (Which one? The one whose husband is also an actor?)
- The formal equivalent (which Bruno would NOT say): Qual? Aquela cujo marido também é ator?
This contrast is vital. Knowing when not to use a grammar point is as important as knowing how to use it.
Quick FAQ
cujo to refer to things, or only people?You can use it for anything that can "possess" something else: people, places, companies, concepts, and objects. For example: A casa cujas janelas estão quebradas... (The house whose windows are broken...).
cujo considered old-fashioned or archaic?Not in formal writing. In written Portuguese, it is considered standard, correct, and educated. It is not archaic, just formal. However, in casual speech, especially in Brazil, it would sound very old-fashioned or even pedantic.
cujo and the o qual structure for possession?Both are formal, but they are structured differently. Cujo is more synthetic and direct. The do qual / da qual structure is more analytical. Compare:
- With
cujo:O livro cujo prefácio foi escrito por um poeta famoso.(more fluid) - With
o qual:O livro, o prefácio do qual foi escrito por um poeta famoso.(more segmented and slightly clunkier)
cujo is preferred for its elegance when the possessive relationship is straightforward.cujo?No. The noun being possessed must appear immediately after cujo. Cujo cannot stand alone. If you want to say "The artist whose work I admire," you cannot shorten it to "The artist whose I admire." You must say O artista cuja obra eu admiro.
Yes, in formal, correct Portuguese, this is a firm rule. Sentences like O autor com cujas ideias eu simpatizo... (The author with whose ideas I sympathize...) are the standard for formal written language. Failing to move the preposition to the front is one of the clearest signs of an English-language interference error.
Agreement of 'Cujo'
| Gender | Singular | Plural |
|---|---|---|
|
Masculine
|
cujo
|
cujos
|
|
Feminine
|
cuja
|
cujas
|
Meanings
A relative pronoun used to express possession, equivalent to 'whose' in English. It links two clauses while indicating that the second noun belongs to the first.
Possessive Relative
Indicates that the noun following it belongs to the noun preceding it.
“O aluno cujo caderno sumiu está triste.”
“A empresa cuja sede fica em Lisboa está contratando.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Possessor + cujo + Object
|
O homem cujo carro quebrou.
|
|
Negative
|
Possessor + cujo + Object + não
|
O homem cujo carro não quebrou.
|
|
Question
|
Quem é o autor cujo livro...
|
Quem é o autor cujo livro você leu?
|
|
Plural
|
Possessor + cujos + Objects
|
O autor cujos livros li.
|
|
Feminine
|
Possessor + cuja + Object
|
A autora cuja casa visitei.
|
|
Plural Fem
|
Possessor + cujas + Objects
|
A autora cujas obras li.
|
Formality Spectrum
O homem cujo carro é vermelho. (Describing someone.)
O homem que tem o carro vermelho. (Describing someone.)
O cara que tem o carro vermelho. (Describing someone.)
O maluco que tem o carro vermelho. (Describing someone.)
Cujo Agreement Map
Masculine
- cujo singular
- cujos plural
Feminine
- cuja singular
- cujas plural
Examples by Level
O homem tem um livro.
The man has a book.
A mulher tem uma casa.
The woman has a house.
Eles têm carros.
They have cars.
Eu tenho uma ideia.
I have an idea.
O menino que tem o livro é meu amigo.
The boy who has the book is my friend.
A menina que tem a casa é minha irmã.
The girl who has the house is my sister.
O carro que ele tem é azul.
The car that he has is blue.
A ideia que ela tem é boa.
The idea that she has is good.
O autor cujo livro li é famoso.
The author whose book I read is famous.
A autora cuja casa visitei é simpática.
The author whose house I visited is nice.
Os alunos cujos cadernos sumiram estão aqui.
The students whose notebooks disappeared are here.
As empresas cujas sedes estão em Lisboa cresceram.
The companies whose headquarters are in Lisbon grew.
Este é o cientista cujo trabalho mudou a medicina.
This is the scientist whose work changed medicine.
A artista cuja exposição vimos é talentosa.
The artist whose exhibition we saw is talented.
Os países cujos governos assinaram o tratado estão em paz.
The countries whose governments signed the treaty are at peace.
As leis cujas origens são antigas precisam de revisão.
The laws whose origins are ancient need revision.
O filósofo, cujo pensamento influenciou gerações, será homenageado.
The philosopher, whose thought influenced generations, will be honored.
A organização, cuja missão é nobre, busca voluntários.
The organization, whose mission is noble, seeks volunteers.
Os autores cujos estilos são distintos colaboraram no livro.
The authors whose styles are distinct collaborated on the book.
As nações cujas fronteiras foram alteradas sofrem instabilidade.
The nations whose borders were altered suffer instability.
O poeta, cujas metáforas transcendem o tempo, é um mestre.
The poet, whose metaphors transcend time, is a master.
A empresa, cujo CEO renunciou, enfrenta crise.
The company, whose CEO resigned, faces a crisis.
Os cientistas cujos dados foram contestados publicaram uma retratação.
The scientists whose data were contested published a retraction.
A cidade, cujas ruas são estreitas, é um labirinto.
The city, whose streets are narrow, is a labyrinth.
Easily Confused
Learners use 'que' for everything.
Both can show possession.
Learners use 'onde' for possession.
Common Mistakes
O homem cujo o carro é azul.
O homem cujo carro é azul.
O homem que o carro é azul.
O homem cujo carro é azul.
O homem cuja carro é azul.
O homem cujo carro é azul.
O homem cujos carro é azul.
O homem cujo carro é azul.
A mulher cujo casa é grande.
A mulher cuja casa é grande.
A mulher cujos casa é grande.
A mulher cuja casa é grande.
A mulher cujo a casa é grande.
A mulher cuja casa é grande.
O autor cujo livros li.
O autor cujos livros li.
A autora cujas casa visitei.
A autora cuja casa visitei.
O autor cujo o livro li.
O autor cujo livro li.
O autor, cujo o livro li, é bom.
O autor, cujo livro li, é bom.
O autor, cujas livros li, é bom.
O autor, cujos livros li, é bom.
O autor, cujo livros li, é bom.
O autor, cujos livros li, é bom.
O autor, cuja livros li, é bom.
O autor, cujos livros li, é bom.
Sentence Patterns
O ___ cujo ___ é ___.
A ___ cuja ___ é ___.
Os ___ cujos ___ são ___.
As ___ cujas ___ são ___.
Real World Usage
O autor, cujo trabalho é pioneiro, afirma que...
Prezado, o cliente cujo pedido foi cancelado...
O protagonista, cujas memórias eram vagas...
O político, cujo mandato termina hoje...
A parte, cujos direitos foram violados...
O homenageado, cujo exemplo seguimos...
Check the object
No articles
Use in writing
Speech vs Writing
Smart Tips
Use 'cujo' to combine two sentences into one elegant relative clause.
Ask yourself: 'Is the object masculine or feminine?' before choosing the form.
Replace 'do qual' with 'cujo' for a more concise and formal style.
Remember the 'No Article Rule': 'cujo' + noun, never 'cujo' + article + noun.
Pronunciation
Cujo pronunciation
Pronounced as 'KOO-zhoo'.
Formal statement
O homem cujo carro é vermelho ↘
Declarative, serious tone.
Memorize It
Mnemonic
Cujo is a 'cujo-chameleon'—it changes color to match the thing it owns.
Visual Association
Imagine a person holding a giant sign that says 'CUJO'. The sign changes shape (masculine/feminine) and size (singular/plural) depending on the object they are holding.
Rhyme
Cujo, cuja, cujos, cujas, match the object, never the user's phases.
Story
Imagine a king (possessor). He has a crown (cujo). He has a queen (cuja). He has many jewels (cujos). He has many castles (cujas). He always carries the right word for the right object.
Word Web
Challenge
Write 4 sentences using 'cujo' to describe your favorite authors and their books.
Cultural Notes
Used almost exclusively in writing. In speech, it sounds very formal.
More common in formal speech than in Brazil, but still formal.
Standard in all Portuguese-speaking academic circles.
Derived from the Latin 'cuius', meaning 'of whom'.
Conversation Starters
Quem é o autor cujo livro você mais gosta?
Conhece alguém cujo trabalho é fascinante?
Qual é a empresa cujos produtos você usa?
Quem é a artista cuja música você ouve sempre?
Journal Prompts
Common Mistakes
Test Yourself
O autor ___ livro li é famoso.
A autora ___ casa visitei é simpática.
Find and fix the mistake:
O homem cujo o carro é azul.
Which sentence is correct?
O homem tem um carro. O carro é azul.
Match each item on the left with its pair on the right:
O artista ___ obras são famosas.
True or False?
Score: /8
Practice Exercises
8 exercisesO autor ___ livro li é famoso.
A autora ___ casa visitei é simpática.
Find and fix the mistake:
O homem cujo o carro é azul.
Which sentence is correct?
O homem tem um carro. O carro é azul.
A mulher / casa
O artista ___ obras são famosas.
True or False?
Score: /8
Practice Bank
10 exercisesO país ___ economia cresce rápido é este.
filha / O / cuja / médico / viajou / chegou .
The student whose grades are high is happy.
O autor cujo livro eu gosto muito escreveu outro.
Match the pairs:
How would you say 'The guy whose car broke' in a formal report?
O professor ___ ideias concordo é aquele.
A cidade cujas as luzes brilham é linda.
Os sapatos ___ preço é alto são caros.
cujas / janelas / A / estão / casa / abertas.
Score: /10
FAQ (8)
It is very formal and rarely used in speech. Use 'que' instead.
No, it changes based on the object possessed.
Yes, it is the Portuguese equivalent of 'whose'.
It is a grammatical rule in Portuguese; the article is absorbed by the pronoun.
Check the gender of the noun that follows it.
Yes, it is standard in both, though formal in both.
Use 'cujos' or 'cujas' accordingly.
Yes, 'cujo' is used for both people and things.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
cuyo
None, they are identical.
dont
French 'dont' is invariant.
dessen/deren
German agrees with the possessor, not the object.
no
Japanese is agglutinative, not a relative pronoun system.
alladhi/allati
Arabic does not have a direct equivalent to 'cujo'.
de
Chinese has no relative pronoun system like Portuguese.
Learning Path
Prerequisites
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