Introduction
Understanding Portuguese preposition contractions is essential for speaking and reading natural Brazilian Portuguese. This article explains the rules for contraction with the prepositions de and em, shows common examples, and offers usage notes that help learners avoid typical mistakes.
What are preposition contractions in Portuguese?
In Portuguese, certain prepositions combine with definite articles and pronouns to form contractions. These contractions make speech and writing smoother and are mandatory in standard Portuguese in many contexts. Two of the most frequent prepositions that contract are de and em.
Why contractions matter
Using contractions correctly helps you sound natural and be understood by native speakers. Many phrases that look separate in English are contracted in Portuguese. Learning the patterns saves time and reduces confusion when reading signs, menus, email, or listening to conversations.
Contractions with de
The preposition de usually expresses possession, origin, material, or partitive sense (of/from/about). When de appears before definite articles or certain pronouns, it often combines to form a single word.
De + articles
When de meets the definite articles o, a, os, as, they contract as follows:
de + o = do
de + a = da
de + os = dos
de + as = das
Examples:
o livro do professor
a casa da minha amiga
as chaves dos carros
as páginas das revistas
De + demonstrative pronouns
With demonstratives este, esta, estes, estas, aquele, aquela, aqueles, aquelas, and esse, essa, esses, essas, contractions are conditional. De contracts with aquele and its plural forms but does not contract with este/esta or esse/essa in standard usage.
de + aquele = daquele
de + aquela = daquela
de + aqueles = daqueles
de + aquelas = daquelas
Examples:
o carro daquele homem
a cor daquela casa
as ideias daqueles estudantes
as fotos daquelas festas
With este/esta and esse/essa, you normally keep de separate: de este, de essa are uncommon in modern Brazilian Portuguese. Instead use do/da or simply de + demonstrative without contraction when clarity demands: o fim de este livro sounds formal and is rarely used.
De + possessive pronouns and personal pronouns
When de is followed by possessive pronouns like meu, tua, seu, nossa, contraction is not used: de meu, de seu are grammatically acceptable but often replaced by do meu, da tua in spoken language. For clarity and naturalness in Brazilian Portuguese, use:
de + meu = do meu (when followed by o) is context-dependent, but many speakers prefer do meu in phrases where an article appears: o caderno do meu irmão. However, if no article precedes the possessive, simply use meu: o caderno meu is less common than o meu caderno.
When referring to people with stressed pronouns like mim, ti, si, and others, de + mim becomes de mim, not contracted: ela falou de mim. For compounding with the pronoun ‘ele’ or ‘ela’, keep de + ele = dele, de + ela = dela. These are forms that look like possessives but originate from contraction and function as possessive pronouns.
Examples:
o vestido da minha mãe
as decisões dele
ela falou de mim sobre o projeto
Special note: possessive forms that look contracted
Some words that look like contractions, such as dele, dela, deles, delas, are historically from de + ele/ela. Use them as possessive pronouns: o livro dele, a casa dela, as ideias deles.
Contractions with em
The preposition em indicates location, time, or manner. Like de, it often contracts with articles to form single words.
Em + articles
em + o = no
em + a = na
em + os = nos
em + as = nas
Examples:
ele está no mercado
ela mora na rua principal
os livros estão nos armários
as chaves estão nas mesas
Em + demonstratives and pronouns
With demonstratives, contraction rules vary. Em contracts with aquele and its forms: em + aquele = naquele, em + aquela = naquela, em + aqueles = naqueles, em + aquelas = naquelas.
Examples:
ele ficou naquele restaurante
a cadeira naquela sala é confortável
os encontros naqueles dias foram longos
With este/esta and esse/essa, keep em separate in many cases or use contraction only in colloquial or set expressions. However, em + este sometimes becomes neste in established usage, and em + esse becomes nesse.
em + este = neste
em + esta = nesta
em + estes = nestes
em + estas = nestas
em + esse = nesse
em + essa = nessa
em + esses = nesses
em + essas = nessas
Examples:
neste momento (more natural than em este momento)
nessa situação (more natural than em essa situação)
Em + pronouns
When em meets pronouns like mim, você, nós, eles, contraction generally does not happen the same way as with articles. Use em + mim, em + você, em + nós as separate words depending on context: ele confia em mim; conte em você is incorrect – say conte comigo. Some verbs require special clitic forms with prepositions (for example, com + mim = comigo, com + você = com você). But for em, we commonly say em mim, nele, nela when referring to third-person: ele acredita em mim, há uma falha nele, confio nela.
Examples:
ela acredita em mim
há fermento nele
o erro está nela
How to choose between contracted and uncontracted forms
Follow these steps to decide whether to contract:
1. Identify the preposition: is it de or em?
2. Look at the next word: is it a definite article (o, a, os, as), demonstrative, or personal pronoun?
3. Apply the standard contraction rules: de + o = do, em + a = na, etc.
4. For demonstratives, remember specific patterns: use daquele/dessa/neste/naquele as appropriate.
5. When in doubt, use the contracted form if it is standard and common; written Brazilian Portuguese favors contractions with definite articles.
Common pitfalls and mistakes
Many learners overuse or underuse contractions. Typical issues include:
– Saying de o instead of do. Correct: do mercado, not de o mercado.
– Using em o instead of no. Correct: no Brasil, not em o Brasil.
– Misapplying contractions with demonstratives: use neste momento, not em este momento.
– Confusing de + pronoun forms: use dela for her possessive, not de ela in most contexts.
Real-life sentence examples
Below are practical sentences showing contractions in context. Each includes a literal translation to help English speakers see the pattern.
Eu voltei do trabalho cedo.
I returned from work early.
Ela é amiga da minha irmã.
She is friend of my sister (She is my sister’s friend).
O livro está na mesa da sala.
The book is on the living room table.
Neste fim de semana vou estudar.
This weekend I will study.
Ele mora naquele apartamento grande.
He lives in that big apartment.
As respostas dos alunos chegaram tarde.
The students’ answers arrived late.
Tem um problema nesse sistema.
There is a problem in that system.
Confio nele para cuidar disso.
I trust him to take care of that.
Additional usage and cultural notes
Brazilian Portuguese tends to prefer contracted forms in spoken and written language for fluidity. In formal writing, contractions are still used; avoiding them can sound awkward or overly literal. Regional variations exist: some rural or older speakers may use slightly different or more conservative forms, but the contractions presented here are widely accepted across Brazil.
Certain fixed expressions always use a contracted form, such as no entanto (yet, however) or do lado de fora (outside). Learning these common collocations helps with comprehension and natural speech.
When not to contract
Avoid forcing contractions when clarity requires separation, such as in poetry, emphasis, or stylistic choices. For instance, a writer might separate words for rhythm or emphasis: de a vida could be a rare stylistic choice, but in most cases do a vida is still odd—use da vida or a vida dela instead.
Quick reference tables
Keep these simple pairs in mind for study and review:
de + o = do
de + a = da
de + os = dos
de + as = das
em + o = no
em + a = na
em + os = nos
em + as = nas
de + aquele = daquele
em + aquele = naquele
em + este = neste
em + esse = nesse
Pronunciation tips
Pronouncing contractions naturally is important. In fast speech, do, da, no, na, do not typically get reduced in a way that makes them indistinguishable. Practice listening for them in songs, TV shows, and podcasts to train your ear. Shadow native speakers by repeating phrases like eu vim do mercado and ela mora na rua several times until the flow feels natural.
Conclusion
Mastering contractions with de and em is a key step to fluency in Brazilian Portuguese. Remember the basic patterns: do/da/dos/das for de plus articles, and no/na/nos/nas for em plus articles, with special forms for demonstratives like neste, naquele, and possessives such as dele and dela. Listen to native usage, practice the common phrases, and soon these contractions will become automatic in your speech and writing.
