Introduction
Learning the difference between ontem and antes is essential for telling time and sequencing events in Portuguese. Both words relate to the past, but they serve different grammatical roles and appear in different contexts. This article explains usage, examples in Brazilian Portuguese, nuances, and tips to help English-speaking learners use these words confidently.
Basic meanings and functions
Ontem means yesterday. It is an adverb of time used to refer specifically to the day before today. Use ontem when you want to mention a past day relative to today.
Antes means before. It is a relative adverb that indicates an earlier time compared to another reference point. Use antes to compare moments, actions, or periods, and not necessarily the literal day before today.
How they differ in a sentence
Ontem points to a fixed reference: yesterday. It does not need another time phrase to make sense. Example:
Eu fui ao mercado ontem.
This sentence clearly indicates the visit happened the day before today.
Antes requires a comparison or reference point: before what? It can be used with verbs, nouns, or clauses that provide that reference. Example:
Eu comi antes de sair.
Here, the eating happened before leaving. The exact day may be unclear; the relation between two actions is what matters.
Grammar details and sentence position
Ontem usually appears at the beginning or end of a sentence, and sometimes between the subject and the verb for emphasis. Its placement is flexible because it modifies the whole clause.
Examples:
Ontem, eu estudei português.
Eu estudei português ontem.
Ontem eu estudei português o dia inteiro.
Antes commonly appears before a verb or a noun phrase that it modifies, and often pairs with a preposition or a conjunction to create clearer temporal relationships.
Examples:
Cheguei antes do jantar.
Eu tinha trabalhado ali antes de me mudar.
Before vs yesterday: comparative examples
Compare these two sentences to see the contrast:
Eu cheguei ontem.
Eu cheguei antes.
In the first sentence, the arrival took place yesterday. In the second, we only know the arrival was earlier than another referenced event (for example, antes da reunião) — the exact day is not specified.
Using antes with specific time markers
Antes can be combined with prepositions like de or do to connect it to specific moments or events:
antes de + infinitive — use this to indicate one action happened before another action
Examples:
Eu lavei as mãos antes de comer.
Ela terminou o relatório antes de sair do escritório.
antes de + noun (with do/da) — link to a specific event or time
Examples:
Cheguei antes da festa começar.
Saí antes do horário combinado.
Using antes sozinho
Antes can stand alone when the context gives the reference point. Native speakers often drop the reference if it is obvious from prior conversation.
Examples:
Você já comeu?
Sim, comi antes.
In this short exchange, antes refers to an action that happened before the current moment of speaking or before another event mentioned earlier.
Tense and aspect with ontem and antes
Ontem pairs naturally with past tenses such as pretérito perfeito and pretérito imperfeito. Choose the past tense based on whether the action is complete or habitual/ongoing in the past.
Pretérito perfeito (completed actions):
Eu estudei ontem.
Pretérito imperfeito (habitual or ongoing past):
Quando eu era criança, estudava piano ontem? No — you would not use ontem with an imparfect habitual meaning. Use ontem mainly with specific past moments.
Antes often appears with pluperfect (pretérito mais-que-perfeito) in formal contexts to express an action that happened before another past action, but in spoken Brazilian Portuguese the combination of pretérito perfeito/imperfeito + antes de + infinitive or antes de + noun is more common.
Examples:
Ela já tinha saído antes da gente chegar.
Eu já tinha terminado o trabalho antes de viajar.
Common verb forms used with antes
Antes de + infinitive: very common and useful in everyday speech. It simply links two actions, one happening before the other.
Examples:
Antes de falar, pense.
Antes de dormir, eu leio por quinze minutos.
Nuances and special uses
Temporal adverbials like ontem are concrete; they tell when an event happened. Relational adverbs like antes are comparative; they tell the order of events. Understanding this distinction helps avoid mistakes.
Negative and interrogative forms
Negatives with ontem simply deny occurrence on that day:
Eu não fui ao cinema ontem.
With antes, negation often emphasizes that something did not happen prior to a reference point:
Ele não tinha saído antes da chuva começar.
Interrogatives with ontem ask about yesterday:
Você trabalhou ontem?
Interrogatives with antes ask about sequence relative to another event:
Você chegou antes da reunião?
Stylistic and cultural notes
Brazilian Portuguese speakers often prefer clear, conversational structures. That means using ontem for direct, everyday references to yesterday and choosing antes for relative timing, sequencing, or when linking actions. In casual speech, people frequently omit explicit reference points when they are understood from context, so antes alone can be perfectly natural.
Also note that in written language and formal registers, you might see more precise temporal expressions or more frequent use of the pretérito mais-que-perfeito when describing sequences of past events.
Practical examples and translations
Below are grouped examples showing how each word appears in realistic contexts. These will help you see patterns and common collocations.
Examples with ontem:
Eu almocei com meus colegas ontem.
Nós viajamos para Santos ontem.
Ela ligou para mim ontem à noite.
Examples with antes for sequence:
Comi antes de sair de casa.
Ele sempre verifica o e-mail antes das reuniões.
Eles discutiram o plano antes da apresentação.
Examples with antes and specific reference:
Cheguei antes do início do filme.
Minha mãe saiu antes do meu aniversário.
Terminei o relatório antes do prazo.
Mixing ontem and antes
Sometimes both words appear together to emphasize sequence relative to yesterday or another past point:
Eu terminei o trabalho ontem, antes de sair do escritório.
Ela chegou ontem, antes de todos os convidados.
In these sentences, ontem sets the day and antes places one action earlier than another within that day.
Common mistakes and how to avoid them
Mistake 1: Using ontem when you mean before another event. Wrong: Eu comi ontem de sair. Correct: Eu comi antes de sair or Eu comi ontem antes de sair.
Mistake 2: Using antes without a clear reference when the listener does not know the comparison point. Wrong in some contexts: Eu cheguei antes. (ambiguous) Better: Eu cheguei antes da reunião or Eu cheguei ontem, antes da reunião.
Mistake 3: Trying to translate English before directly into Portuguese word order. Remember that antes is often followed by de + infinitive or by do/da + noun to form natural phrases.
Quick usage checklist
Use ontem when you want to specify the day before today.
Use antes when you want to say that something happened earlier than another moment or event.
Combine both when you need to specify the day and the sequence between events.
Conclusion
Understanding the difference between ontem and antes makes your Portuguese more accurate and natural. Use ontem for concrete references to yesterday and antes for sequencing events or comparing times. Pay attention to verb tense combinations and common structures such as antes de + infinitive and antes do/da + noun, and you will quickly gain confidence when speaking and writing in Brazilian Portuguese.
