Introduction
Learn how to avoid the most common mistakes with prepositions in Brazilian Portuguese when writing simple sentences. This guide explains practical rules, shows realistic examples learners use in emails, messages, and short paragraphs, and gives clear correction tips so your written Portuguese becomes more natural and correct.
- Why prepositions matter in Portuguese writing
- Common mistake 1: Using em vs. em + definite article
- Common mistake 2: Confusing para and por
- Common mistake 3: Using de instead of em or vice versa
- Common mistake 4: Forgetting prepositions after verbs that require them
- Common mistake 5: Preposition + infinitive vs. preposition + noun
- Common mistake 6: Using com for possession instead of de
- Prepositions with time and dates — practical patterns
- Prepositions in polite requests and emails
- Practical writing patterns and short templates
- Common punctuation and accent notes related to prepositional phrases
- Quick checklist before sending messages or homework
- Practice examples and corrections
- Beginner tips to internalize prepositions
- Resources for focused practice
- Conclusion
Why prepositions matter in Portuguese writing
Prepositions connect words and express relationships of place, time, cause, manner, and possession. Small errors change meaning or make sentences sound unnatural. For English speakers, some prepositions look similar but behave differently in Portuguese, and certain verbs require specific prepositions. Focusing on common beginner contexts — messages, forms, short emails, and travel notes — helps you write correctly every day.
Basic list of frequently used Brazilian Portuguese prepositions
em (in/on/at)
de (of/from/about)
para (for/to/toward)
por (by/for/due to/through)
com (with)
sem (without)
entre (between/among)
até (until/up to/to)
Common mistake 1: Using em vs. em + definite article
Mistake: writing em with an article or omitting it when the noun requires contraction. In Portuguese, em + o = no, em + a = na. Beginners often write em o or em a or forget the contraction in everyday sentences.
Wrong: Eu moro em o Brasil.
Right: Eu moro no Brasil.
Wrong: Coloquei o livro em a mesa.
Right: Coloquei o livro na mesa.
Tip: When writing addresses, locations, or simple descriptions, decide if the noun needs an article. If so, use the contraction: no, na, nos, nas.
Common mistake 2: Confusing para and por
Mistake: using para and por interchangeably. Para often indicates purpose, destination, or deadline. Por usually indicates reason, means, duration, or exchange. Choose based on intent to avoid changing meaning.
Wrong: Comprei este presente por você. (This implies I bought the present because of you or on your behalf, which can be confusing.)
Right: Comprei este presente para você. (I bought this present for you.)
Wrong: Vou viajar para dois dias.
Right: Vou viajar por dois dias. (Duration)
Right: Vou viajar para São Paulo. (Destination)
Tip: For gifts, recipients, or goals use para. For durations, reasons, or means use por.
Common mistake 3: Using de instead of em or vice versa
Mistake: choosing de when em is needed, especially after verbs that take em, and in fixed expressions. This often happens in short messages and forms.
Wrong: Estou interessado de aprender português.
Right: Estou interessado em aprender português.
Wrong: Trabalho de casa. (Ambiguous; looks like housework rather than working from home.)
Right: Trabalho em casa. (I work at/in home.)
Tip: Learn verb + preposition pairs. Common pairs: interessado em, pensado em, acreditar em, depender de, lembrar de.
Common mistake 4: Forgetting prepositions after verbs that require them
Mistake: omitting prepositions that are part of verbal structures. Some verbs require a specific preposition before an infinitive or noun.
Wrong: Preciso ir supermercado.
Right: Preciso ir ao supermercado. (ir + a; ao = a + o)
Wrong: Esqueci meu livro casa.
Right: Esqueci meu livro em casa. (esquecer + em when indicating location)
Common verb-preposition pairs:
ir a / ir para (destination)
chegar a / chegar em (both used, but chegar em is more common in Brazil for places)
gostar de, precisar de, esquecer de, lembrar de
Tip: When writing short emails or notes like Preciso ir ao banco hoje, check required prepositions for the main verbs.
Common mistake 5: Preposition + infinitive vs. preposition + noun
Mistake: using para + infinitive vs. por + infinitive incorrectly. Portuguese often uses para + infinitive for purpose and por + infinitive for passive meanings or approximations, but beginners transfer English structures directly.
Wrong: Estudo por aprender português. (Incorrect purpose)
Right: Estudo para aprender português. (Purpose)
Wrong: O livro foi escrito para muitos autores. (Meaning unclear)
Right: O livro foi escrito por muitos autores. (By – agent)
Tip: For purpose use para + infinitive. For agent or cause use por + agent/noun.
Common mistake 6: Using com for possession instead of de
Mistake: translating English have or with into Portuguese literally using com. In Portuguese, possession is typically expressed with ter or with de for ‘of’ constructions, not com.
Wrong: Eu tenho um amigo com carro novo.
Right: Eu tenho um amigo com um carro novo. (If you mean the friend possesses a car, com + noun is possible but often better with article)
Better: Eu tenho um amigo que tem um carro novo.
Wrong: O livro com capa azul é meu.
Right: O livro de capa azul é meu. or O livro com capa azul é meu. (Both can work; de is more idiomatic for features: livro de capa azul.)
Tip: For characteristics use de + noun often: casa de madeira, camisa de algodão. For accompaniment, use com: café com leite.
Prepositions with time and dates — practical patterns
Time expressions use specific prepositions: em for months and seasons, no/na for specific month + article contractions, às for times, and desde/desde que for since.
Examples beginners write in schedules and messages:
Eu vou viajar em julho.
Reunião na segunda-feira às 14h.
Estou aqui desde segunda.
Mistakes to avoid: writing em antes of horas or using a wrong contraction. Wrong: Em segunda-feira às 14h. Right: Na segunda-feira às 14h.
Prepositions in polite requests and emails
In short emails and messages, prepositions set formality and clarity. Common phrases with correct prepositions:
Gostaria de marcar uma reunião para segunda-feira.
Enviei o documento por e-mail.
Posso falar com você às 10h?
Mistake to avoid: using por when you mean para in polite requests. Wrong: Preciso do relatório por amanhã. Right: Preciso do relatório para amanhã. or Preciso do relatório até amanhã.
Tip: Use até for deadlines and para for intended recipients or purposes.
Practical writing patterns and short templates
Use these simple patterns for messages, forms, and emails. Replace brackets with your words.
Pattern for asking for permission: Posso [verbo] com [pessoa] às [hora]?
Example: Posso falar com a Maria às 10h?
Pattern for giving location: Estou [em] [lugar].
Example: Estou no escritório.
Pattern for explaining reason: Não posso ir porque [motivo]. or Não vou por [motivo].
Example: Não posso ir porque estou doente. or Não fui por falta de tempo.
Pattern for deadline: Preciso do [documento] até [data/hora].
Example: Preciso do relatório até amanhã às 12h.
Common punctuation and accent notes related to prepositional phrases
Punctuation affects clarity. Use commas to separate introductory prepositional phrases when necessary in longer sentences. Accents do not change with prepositions, but pay attention to contractions like ao, à (a + a), and às (a + as) which require accent on the grave when contraction creates a feminine article with a preposition.
Example: Vou à festa às 20h. (a + a = à; a + as = às)
Mistake: writing a festa instead of à festa in formal writing. Wrong: Vou a festa às 20h. Right: Vou à festa às 20h.
Quick checklist before sending messages or homework
Verify verb + preposition pairs for key verbs (gostar de, precisar de, depender de).
Check contractions: em + o = no, em + a = na, a + o = ao, a + a = à.
Decide between por and para based on duration vs purpose vs agent.
Use em for months and places; use em casa for at home; use no/na for specific locations with articles.
Proofread short sentences to ensure correct article use and to avoid literal English translations like em vez de usar de por confusão.
Practice examples and corrections
Beginner message wrong: Vou no mercado comprar frutas amanhã.
Correction: Vou ao mercado comprar frutas amanhã.
Beginner email wrong: Envio o relatório para segunda, por favor confirme.
Correction: Envio o relatório na segunda. Por favor, confirme.
Travel note wrong: Estou aqui desde terça-feira em hotel.
Correction: Estou aqui desde terça-feira no hotel.
Restaurant note wrong: Queria uma mesa para duas sem janela.
Correction: Queria uma mesa para duas sem janela. or Queria uma mesa para duas, sem janela.
Beginner tips to internalize prepositions
Make small phrase lists with verbs you use daily (precisar de, ir a/para, gostar de) and write 5-10 example sentences for each.
Write simple messages you would actually send: appointment confirmations, short travel notes, shopping lists, and practice the prepositions in context.
When in doubt, choose the pattern that native Brazilian speakers use: ao/à instead of em o/em a, and para for recipients/purposes, por for duration and cause.
Resources for focused practice
Use short exercises that ask you to fill in prepositions in realistic dialogues: booking a hotel, sending an email, describing your schedule.
Create flashcards of verb-preposition pairs and test by writing one-sentence examples you might send to a friend or teacher.
Ask a native speaker to correct short messages; corrections help you see patterns quickly.
Conclusion
Mastering prepositions in Brazilian Portuguese takes focused attention to common pairs, contractions, and differences between por and para. Use the practical sentence patterns and correction tips in everyday messages, emails, and travel notes. Regularly writing short, real-life examples and checking this quick checklist will improve accuracy and confidence.
