Portuguese Word Mergers: Prepositions + Articles (do, na, ao)
Grammar Rule in 30 Seconds
In Portuguese, prepositions like 'de' and 'em' merge with articles like 'o' or 'a' to form single, fluid words.
- De + o = do (of the, masculine). Example: O carro do João.
- Em + a = na (in the, feminine). Example: Estou na escola.
- A + o = ao (to the, masculine). Example: Vou ao cinema.
Overview
In Portuguese, prepositions and definite articles frequently combine, or contract, into a single word. This phenomenon is a fundamental aspect of the language, not merely an informal shortcut. Understanding and correctly using these contractions is crucial for both comprehension and natural communication, even at an A1 level.
The primary contractions involve the prepositions de (of/from), em (in/on/at), a (to/at), and por (by/through), which merge with the definite articles o, a, os, and as (the). Failure to use these contractions results in grammatically incorrect and unnatural-sounding Portuguese, hindering effective communication.
This mandatory fusion reflects a linguistic principle of phonetic economy, where sounds are simplified for smoother pronunciation and faster speech flow. Instead of uttering two distinct words (de o), speakers naturally merge them into one fluid sound (do). This is why, in Portuguese, you will almost always hear do livro (of the book) rather than de o livro, or na escola (at the school) instead of em a escola.
Mastering these initial contractions is a gateway to sounding more authentic and understanding native speakers more easily.
How This Grammar Works
de, meaning 'of' or 'from'. When de precedes the masculine singular article o (the), it becomes do. For example, Ele é do Brasil. (He is from Brazil.) Similarly, em, meaning 'in', 'on', or 'at', merges with a (the) to form na, as seen in Estou na sala. (I am in the living room.) This process is not optional; it is an inherent part of Portuguese grammatical structure.Formation Pattern
por presents a minor irregularity. The key is to identify the preposition and the article, then apply the correct merger. The definite articles in Portuguese are: o (masculine singular), a (feminine singular), os (masculine plural), and as (feminine plural). Always remember that the contraction will agree with the noun that follows it.
DE (of / from)
de combines with definite articles, the e of de is dropped, and the article is appended.
de | o | do | O carro do meu pai. | The car of my father (my father's car). |
de | a | da | A cor da camisa. | The color of the shirt. |
de | os | dos | As casas dos amigos. | The houses of the friends (the friends' houses). |
de | as | das | Os nomes das ruas. | The names of the streets. |
EM (in / on / at)
em combines with definite articles, the m of em is often nasalized or changes to n, and the article is appended.
em | o | no | Eu estou no escritório. | I am in the office. |
em | a | na | O livro está na mesa. | The book is on the table. |
em | os | nos | Nós moramos nos Estados Unidos. | We live in the United States. |
em | as | nas | Eles jogam nas férias. | They play during the holidays. |
A (to / at)
a combines with definite articles, it typically merges directly. The most notable form is à, which is known as crase.
a | o | ao | Eu vou ao supermercado. | I am going to the supermarket. |
a | a | à | Eu vou à praia. | I am going to the beach. |
a | os | aos | Ele deu o presente aos pais. | He gave the present to the parents. |
a | as | às | Chegamos às duas horas. | We arrived at two o'clock. |
À (Crase)
à (and its plural às) signifies the fusion of the preposition a with the feminine definite article a (or as). The grave accent (` `) over the a is the crase mark, indicating that two as have merged into one. This occurs exclusively when the preposition a precedes a feminine word introduced by the feminine definite article a (or as`). It is essentially a visual marker that clarifies the presence of both the preposition and the article.
POR (by / through / for)
por | o | pelo | Ele passou pelo parque. | He passed through the park. |
por | a | pela | Nós andamos pela cidade. | We walked through the city. |
por | os | pelos | Eles foram pelos caminhos mais curtos. | They went by the shortest paths. |
por | as | pelas | Ela viajou pelas montanhas. | She traveled through the mountains. |
Gender & Agreement
do, na, aos, pelas, etc.) must always match the gender and number of the noun that immediately follows it, specifically the noun to which the definite article refers. It does not agree with the subject of the sentence or the speaker.livro (book), you will use a masculine singular contraction. O autor do livro é famoso. (The author of the book is famous.) Here, do agrees with livro, which is masculine singular. If the noun is feminine singular, such as escola (school), you will use a feminine singular contraction.As crianças vêm da escola. (The children come from the school.) In this case, da agrees with escola, a feminine singular noun.Ele gosta dos filmes de ação. (He likes action movies.) Here, dos agrees with filmes, which is masculine plural. And Ela prefere as praias das ilhas. (She prefers the beaches of the islands.) Here, das agrees with ilhas, which is feminine plural.When To Use It
DE)do, da, dos, das to indicate possession, belonging, or origin. This is equivalent to 'of the' or 'from the' in English.A chave da porta.(The key of the door / The door's key.)Ele é do Porto.(He is from Porto.)O preço dos bilhetes.(The price of the tickets.)
EM)no, na, nos, nas to express being 'in', 'on', or 'at' a specific place or state. This is fundamental for describing where things or people are.O computador está na secretária.(The computer is on the desk.)Eles vivem nos arredores da cidade.(They live in the outskirts of the city.)Estou no trabalho.(I am at work.)
A)ao, à, aos, às to indicate movement 'to' a place or a specific time. Remember à for feminine destinations.Vamos ao cinema hoje à noite.(We are going to the cinema tonight.)Ele foi à padaria.(He went to the bakery.)As aulas começam às nove horas.(Classes start at nine o'clock.)
POR)pelo, pela, pelos, pelas to convey 'by way of', 'through', or sometimes 'for' a period or reason.Passamos pelo centro histórico.(We passed through the historic center.)Ela caminha pela manhã.(She walks in the morning.)Enviou a carta pelo correio.(He sent the letter by mail.)
Common Mistakes
- Incorrect:
Eu gosto de o café.(I like of the coffee.) - Correct:
Eu gosto do café.(I like the coffee.) - Incorrect:
Ela está em a casa.(She is in the house.) - Correct:
Ela está na casa.(She is in the house.)
do meaning 'of the', not two separate words.- Incorrect:
Estou na carro.(carrois masculine singular, sonais wrong.) - Correct:
Estou no carro.(I am in the car.) - Incorrect:
Ele fala da problemas.(problemasis masculine plural, sodais wrong.) - Correct:
Ele fala dos problemas.(He talks about the problems.)
o, a, os, as) must match the noun. Na incorporates the feminine a, which clashes with the masculine carro. Always check the gender and number of the noun being defined by the article.À (Crase)à or às) is particularly challenging. Mistakes often involve using it where it's not needed (e.g., before masculine nouns, or verbs) or omitting it where it is required.- Incorrect:
Eu vou ao praia.(praiais feminine, requiresà.) - Correct:
Eu vou à praia.(I am going to the beach.) - Incorrect:
Ele chegou à tempo.(tempois masculine, so crase is incorrect.) - Correct:
Ele chegou a tempo.(He arrived on time. – no article needed, so no contraction.)
a with feminine article a. If the article is masculine, or if no article is present, crase cannot occur. It is not an arbitrary accent mark.POR Contractionspor (forming pelo, pela, pelos, pelas) can also trip learners. Some might try to apply the de or em pattern, leading to incorrect forms like po or porn.- Incorrect:
Ele andou po parque. - Correct:
Ele andou pelo parque.(He walked through the park.)
Por has an older, distinct etymological path that resulted in this specific contraction. It's an exception that simply needs to be memorized as part of the core patterns.Common Collocations
do, na, ao, and pelo:DE (do, da, dos, das):sair do trabalho(to leave work) -Preciso sair do trabalho cedo hoje.(I need to leave work early today.)ter saudades de alguém/alguma coisa(to miss someone/something) -Tenho saudades da minha família.(I miss my family.)gostar de(to like) -Gosto muito da música brasileira.(I really like Brazilian music.)falar do assunto(to talk about the subject) -Eles falam dos problemas do país.(They talk about the country's problems.)
EM (no, na, nos, nas):estar em casa(to be at home) -Ficamos em casa no fim de semana.(We stayed home on the weekend.)pôr na mesa(to put on the table) -Põe os pratos na mesa, por favor.(Put the plates on the table, please.)pensar em(to think about) -Estou pensando no meu futuro.(I am thinking about my future.)entrar no ônibus(to get on the bus) -Vamos entrar no próximo ônibus.(We're going to get on the next bus.)
A (ao, à, aos, às):ir a algum lugar(to go somewhere) -Sempre vamos ao cinema às sextas.(We always go to the cinema on Fridays.)chegar a(to arrive at) -Chegamos à estação a tempo.(We arrived at the station on time.)assistir a(to watch, requires 'a') -Você assistiu ao jogo ontem?(Did you watch the game yesterday?)dedicar-se a(to dedicate oneself to) -Ela se dedica aos estudos.(She dedicates herself to her studies.)
POR (pelo, pela, pelos, pelas):passar por(to pass through/by) -Vou passar pela livraria.(I'm going to pass by the bookstore.)optar por(to opt for) -Ele optou pelo caminho mais longo.(He opted for the longer path.)lutar por(to fight for) -Eles lutaram pela liberdade.(They fought for freedom.)
Real Conversations
In contemporary Portuguese, whether in casual spoken interactions, text messages, or social media, these preposition-article contractions are ubiquitous and essential for conveying meaning efficiently. Native speakers use them instinctively, making their absence immediately noticeable and jarring to the listener or reader. This reflects how deeply ingrained they are in the language's natural rhythm and flow.
Consider a typical exchange via text message:
- Amigo 1: Onde estás? (Where are you?)
- Amigo 2: Estou no centro comercial. E tu? (I'm at the mall. And you?)
- Amigo 1: Vou ao café da esquina. (I'm going to the corner café.)
- Amigo 2: Encontro-te lá depois do almoço. (I'll meet you there after lunch.)
In this brief exchange, no, ao, and do are used naturally and correctly. Omitting them would render the messages incomprehensible or extremely awkward, e.g., Estou em o centro comercial. The fluidity of contracted forms is critical for rapid, everyday communication. On social media, captions often use these forms concisely:
- Vistas deslumbrantes da montanha! (Stunning views of the mountain!) – da is used for de a montanha.
- Fim de semana na praia com amigos. (Weekend at the beach with friends.) – na is used for em a praia.
- Corrida pelo parque de manhã. (Run through the park in the morning.) – pelo is used for por o parque.
Even in professional emails, while the tone might be more formal, the contractions remain grammatically required. Gostaria de falar sobre os resultados do projeto. (I would like to talk about the project results.) This consistent usage across all registers underscores their importance; they are not limited to informal speech but are a core grammatical component of Portuguese.
Quick FAQ
- Q: Is
aothe same aspara o? - A: Not exactly. While both can indicate 'to the',
ao(andà) generally suggests a more direct, immediate, or integrated destination.Para o(andpara a, etc.) often implies a destination with a longer stay, a purpose, or a sense of 'for the purpose of'. For example,Vou ao cinema.(I'm going to the cinema – to watch a movie) vs.Vou para o cinema.(I'm heading towards the cinema – could be to work there, or just to the vicinity). For A1, focus onaofor simple 'to the' actions.
- Q: What happens with plural nouns?
- A: The same contraction rules apply, simply using the plural definite articles. So,
de+os=dos,de+as=das;em+os=nos,em+as=nas;a+os=aos,a+as=às;por+os=pelos,por+as=pelas. It's a straightforward addition of 's' to the article component of the contraction.
- Q: Does this happen with names or proper nouns?
- A: Yes, frequently, especially in Brazilian Portuguese. It is common to place a definite article before a person's name, and when a preposition precedes this article, contraction occurs. For example,
o João(the João) becomesdo João(of João).Vou falar com a Maria.(I'm going to talk to Maria) becomesVou à Maria.if the verb requires the prepositiona. In European Portuguese, this usage with personal names is less common but still occurs with place names:Vou ao Porto.(I'm going to Porto.)
- Q: Is
àreally justa+a? - A: Absolutely. The
à(crase) is a specific graphical representation of the merger of the prepositionawith the feminine definite articlea. It is a fundamental rule indicating that both elements are present and have combined. It's a visual cue to distinguish it from the standalone prepositionaor the standalone articlea.
- Q: What about contractions with indefinite articles (like
um,uma)? - A: Yes, prepositions also contract with indefinite articles, although often omitted in written European Portuguese, they are common in spoken language and Brazilian Portuguese. For example,
de+um=dum(of a),em+uma=numa(in a). At the A1 level, the focus is predominantly on definite article contractions due to their higher frequency and mandatory nature, but be aware that these indefinite contractions exist and you will encounter them, especially in spoken Brazilian Portuguese.
Preposition + Article Contractions
| Preposition | o (masc) | a (fem) | os (masc pl) | as (fem pl) |
|---|---|---|---|---|
|
De
|
do
|
da
|
dos
|
das
|
|
Em
|
no
|
na
|
nos
|
nas
|
|
A
|
ao
|
à
|
aos
|
às
|
Meanings
These contractions occur when a preposition meets a definite article, creating a single, mandatory word for better flow.
Possession (De + Article)
Indicates belonging or origin.
“O livro do professor.”
“A chave da porta.”
Location (Em + Article)
Indicates being inside or at a place.
“Estou no restaurante.”
“Ela está na praia.”
Direction (A + Article)
Indicates movement toward a destination.
“Vou ao médico.”
“Vamos à festa.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
De + o
|
O gato do vizinho.
|
|
Affirmative
|
Em + a
|
Ela está na sala.
|
|
Affirmative
|
A + o
|
Vou ao banco.
|
|
Negative
|
De + os
|
Não gosto dos filmes.
|
|
Question
|
Em + o
|
Você está no trabalho?
|
|
Question
|
A + a
|
Vamos à festa?
|
|
Short Answer
|
De + a
|
É da Maria.
|
|
Short Answer
|
Em + as
|
Estão nas caixas.
|
Formality Spectrum
Estou na residência. (Location)
Estou na casa. (Location)
Tô na casa. (Location)
Tô na casa. (Location)
The Contraction Web
Masculine
- do of the
- no in the
Feminine
- da of the
- na in the
Examples by Level
O livro do aluno.
The student's book.
Estou na escola.
I am at the school.
Vou ao mercado.
I am going to the market.
A chave da casa.
The house key.
Eles moram no Brasil.
They live in Brazil.
O carro dos meus pais.
My parents' car.
Vamos à praia hoje.
We are going to the beach today.
As cores das flores.
The colors of the flowers.
Ele chegou ao aeroporto cedo.
He arrived at the airport early.
Estou nas nuvens de felicidade.
I am on cloud nine with happiness.
O resultado do exame saiu.
The exam result came out.
Ela trabalha na empresa de tecnologia.
She works at the technology company.
A solução do problema reside na paciência.
The solution to the problem lies in patience.
Ele foi ao encontro dos amigos.
He went to meet his friends.
As decisões das autoridades foram criticadas.
The authorities' decisions were criticized.
Estamos no meio de uma crise.
We are in the middle of a crisis.
A essência do ser humano encontra-se na liberdade.
The essence of the human being is found in freedom.
Ele referiu-se às mudanças climáticas.
He referred to climate change.
O impacto das políticas públicas é visível.
The impact of public policies is visible.
Chegamos ao ápice da discussão.
We reached the peak of the discussion.
A transição do modelo clássico ao moderno.
The transition from the classical model to the modern one.
Às vezes, a beleza reside na simplicidade.
Sometimes, beauty lies in simplicity.
O desfecho da narrativa surpreendeu a todos.
The narrative's outcome surprised everyone.
Na medida em que o tempo passa, entendemos.
As time passes, we understand.
Easily Confused
Learners often use 'o' when they need 'no'.
Learners use 'de' when they need 'do'.
Learners forget the grave accent on feminine words.
Common Mistakes
de o
do
em a
na
a o
ao
a a
à
de os
dos
em os
nos
a as
às
de a
da
em o
no
a o
ao
de a
da
em a
na
a a
à
de o
do
Sentence Patterns
Eu estou ___ ___.
Este é o livro ___ ___.
Eu vou ___ ___.
A cor ___ ___ é azul.
Real World Usage
Tô no café.
Falei do projeto.
Vou ao aeroporto.
O pedido do cliente.
Na praia com eles!
A análise dos dados.
Listen for the rhythm
Don't skip the accent
Practice in pairs
Regional variation
Smart Tips
Think 'do' or 'da' immediately.
Think 'no' or 'na' immediately.
Think 'ao' or 'à' immediately.
Check if you need the grave accent (à).
Pronunciation
Vowel merging
The merged words are pronounced as a single unit, often with a slightly longer vowel sound.
Statement
Estou na casa. ↘
Falling intonation at the end.
Memorize It
Mnemonic
Remember the 'Glue Rule': Prepositions and articles are like magnets; they snap together instantly.
Visual Association
Imagine a tiny magnet on the word 'de' and another on 'o'. When they get close, they click together to form 'do'.
Rhyme
When 'de' meets 'o', it becomes 'do', it's the easiest rule for you!
Story
Maria is walking. She wants to go to the park. She says 'Vou ao parque'. Then she sees her friend's dog. She says 'É o cachorro do meu amigo'. Finally, she goes home and says 'Estou na minha casa'.
Word Web
Challenge
For the next 5 minutes, label 5 objects in your room using 'do' or 'da' (e.g., 'a porta da sala').
Cultural Notes
In Brazil, 'no' and 'na' are often used for 'to' in informal speech, though 'ao' is technically correct.
In Portugal, the distinction between 'ao' (to) and 'no' (in) is strictly maintained.
Usage is similar to Portugal, with a focus on clear, formal contractions.
These contractions evolved from Latin, where prepositions and articles were often fused in speech.
Conversation Starters
Onde você está?
De quem é este livro?
Para onde você vai?
Qual é a cor da sua casa?
Journal Prompts
Common Mistakes
Test Yourself
no
O carro ___ João.
Find and fix the mistake:
Vou à praia.
Vou ao mercado.
Match each item on the left with its pair on the right:
na
As chaves ___ casa.
Find and fix the mistake:
O livro dos alunos.
Score: /8
Practice Exercises
8 exercisesno
O carro ___ João.
Find and fix the mistake:
Vou à praia.
Vou ao mercado.
do
na
As chaves ___ casa.
Find and fix the mistake:
O livro dos alunos.
Score: /8
Practice Bank
10 exercisesO gato está ___ (em + a) mesa.
Translate: From the airport
Eles moram ___ (em + os) Estados Unidos.
Eu gosto de as flores.
festa / na / estou / Eu
Match the following:
Ela vai ___ (a + a) escola.
Nós passamos ___ (por + a) rua principal.
Onde está o controle de o TV?
Translate: In the cars
Score: /10
FAQ (8)
To make speech faster and more fluid. It avoids the 'hiatus' between vowels.
Yes, they are standard in all forms of Portuguese.
You will sound like a beginner or someone reading very slowly.
No, 'à' is a contraction of 'a + a'.
No, they just change the form of the words.
Yes, they are required in formal writing.
Very few, mostly in specific proper names.
Use them in daily sentences and label objects in your house.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
del, al
Portuguese contracts 'em' (in), while Spanish does not.
du, au
French uses different forms for plural contractions (des, aux).
im, am
German contractions are based on cases, not just articles.
particles
Japanese is agglutinative but does not merge prepositions and articles.
prefixes
Arabic uses prefixes, not contractions of separate words.
none
Chinese has no articles and no contractions of this type.
Learning Path
Prerequisites
Learn These First
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