uma vez que

Causal Uma Vez Que

Level 4

Uma vez que is a formal way to say 'since' or 'given that'. It introduces a reason or cause that is already known or established as a fact.

How It Works

The expression uma vez que is a staple of formal Portuguese. While it translates to 'because', it carries a specific nuance of 'seeing as' or 'in view of the fact that'.

1. Usage and Register:
Unlike the common porque, which is used in all contexts, uma vez que is preferred in formal registers. It is very common in written Portuguese but less frequent in casual conversation, where speakers prefer já que.

2. Mood and Syntax:

  • Causal: When used to explain a reason, it uses the Indicative (e.g., uma vez que é...).
  • Position: It can start a sentence (followed by a comma after the clause) or connect two clauses in the middle.
  • Non-Causal Meanings: If followed by the Subjunctive, the meaning changes to 'provided that' (conditional) or 'once' (temporal).

3. Logical Weight:
It suggests that the consequence follows naturally from the cause. It is often used when the cause is a premise that the listener already knows or accepts as true.

Examples (4)

  1. Uma vez que o prazo termina amanhã, precisamos de enviar o relatório hoje.

    Given that the deadline ends tomorrow, we need to send the report today.

    Word by Word: One time that the deadline ends tomorrow, we need of to send the report today.

    Here, the cause (the deadline) is presented as a known fact that necessitates the action.

  2. Não pudemos concluir a obra, uma vez que os materiais não foram entregues.

    We could not finish the work, since the materials were not delivered.

    Word by Word: Not we could conclude the work, one time that the materials not were delivered.

    In this sentence, the conjunction explains the reason for the failure to finish the work in a formal tone.

  3. Uma vez que todos concordam, podemos avançar para a votação.

    Seeing as everyone agrees, we can move to the vote.

    Word by Word: One time that all agree, we can advance to the voting.

    The cause (agreement) is the premise that allows the next step (voting) to happen.

  4. A empresa decidiu contratar mais pessoal, uma vez que a procura aumentou.

    The company decided to hire more staff, since demand has increased.

    Word by Word: The company decided to hire more staff, one time that the demand increased.

    A typical example of professional/business register using this pattern.

Common Mistakes

  • Omitting 'uma' and saying only 'vez que'.

    Vez que o tempo está bom, vamos sair.
    Uma vez que o tempo está bom, vamos sair.

    Dropping the 'uma' is considered a grammatical error (solecism) in standard Portuguese, though it is sometimes seen in poorly written legal jargon.

  • Using the subjunctive for a causal meaning.

    Uma vez que ele esteja doente, não vem.
    Uma vez que ele está doente, não vem.

    Causal clauses report facts. Therefore, you must use the Indicative mood. Using the subjunctive changes the meaning to 'Provided that' or 'In the event that'.

How It Connects

Tap a pattern to see what it builds on and what it leads to.

uma vez queLevel 4Causal Uma Vez Que

Learn This First

To understand 'uma vez que', a learner needs to be familiar with the indefinite article 'uma' and the use of 'que' to connect clauses. Since this is a formal causal connector, the learner should also already understand basic cause-and-effect structures using 'porque'.

Words in This Pattern

uma vez que