quando + Preterite

Quando (Interruption)

Level 2

The 'Interrupting Preterite' is the 'snap' in a story. While the background is ongoing (Imperfect), this pattern marks the specific moment something else happened.

How It Works

This pattern is essential for storytelling and daily reporting. It relies on the contrast between two past tenses to show how events relate in time:

1. The Background: Usually expressed with the Pretérito Imperfeito (e.g., eu dormia - 'I was sleeping') or the past progressive estava + gerúndio in Brazil (e.g., eu estava dormindo - 'I was sleeping') and estar a + infinitivo in Portugal (e.g., eu estava a dormir - 'I was sleeping').
2. The Punctual Event: Expressed with quando + Pretérito Perfeito (e.g., quando o telefone tocou - 'when the phone rang').

Key Nuances:

  • Flexible Clause Order: The quando clause can go at the beginning or in the middle of the sentence without changing the meaning (e.g., Eu dormia quando o telefone tocou - 'I was sleeping when the phone rang' OR Quando o telefone tocou, eu dormia - 'When the phone rang, I was sleeping').
  • Quando with the Background: While quando often introduces the punctual event, it is not strictly forbidden from touching the Imperfeito and can also introduce the background action (e.g., O telefone tocou quando eu dormia - 'The phone rang when I was sleeping').
  • Interruption vs. Occurrence: The Pretérito Perfeito marks a punctual event that happens during a background state. This might physically stop the background action (interruption) or simply occur while the background continues (e.g., Eu caminhava quando vi um pássaro - 'I was walking when I saw a bird').
  • Irregular Verbs: Punctual 'interrupting' verbs are frequently highly irregular in the Pretérito Perfeito. Be sure to review forms like ver (vi), fazer (fez), and vir (veio) for the quando clause.
  • Contrast with Enquanto: While quando + Pretérito Perfeito introduces a punctual interruption, enquanto + Imperfeito is used to describe two background actions happening simultaneously (e.g., Eu cozinhava enquanto ele lia - 'I was cooking while he was reading').
  • Sequence of Events: If you use the Pretérito Perfeito for both actions (Quando ele chegou, eu saí - 'When he arrived, I left'), it indicates a sequence: first he arrived, and then I left.
  • Past Habits: If you use the Imperfect for both (Quando eu morava em Braga, eu corria todos os dias - 'When I lived in Braga, I ran every day'), it describes a habitual state or repeated action in the past.
  • Regional Note: In European Portuguese, the 1st person plural (nós) of -ar verbs in the Pretérito Perfeito often takes an acute accent (e.g., falámos - 'we spoke') to indicate an open 'a' sound, distinguishing it from the closed 'a' in the present tense (falamos). Under the 1990 Orthographic Agreement, this accent is technically optional but remains widely used. In Brazilian Portuguese, the 'a' is closed/nasal in both tenses, so both are written as falamos. For -er and -ir verbs, the present and past forms are identical in both variants (e.g., comemos, partimos).

Examples (5)

  1. Eu estudava quando o telefone tocou.

    I was studying when the phone rang.

    Word by Word: I studied [imperfect] when the telephone rang [preterite].

    The background action (studying) is in the imperfect, while the sudden interruption (ringing) is in the preterite.

  2. Nós jantávamos quando a luz acabou.

    We were having dinner when the power went out.

    Word by Word: We dined [imperfect] when the light ended [preterite].

    The power going out is a completed, punctual event that happened during the dinner.

  3. Eu caminhava no parque quando vi um acidente.

    I was walking in the park when I saw an accident.

    Word by Word: I walked [imperfect] in the park when [I] saw [preterite] an accident.

    Seeing the accident is the specific moment that 'interrupts' the continuous action of walking.

  4. Estávamos a dormir quando o despertador tocou.

    We were sleeping when the alarm clock rang.

    Word by Word: We were to sleep [EP style] when the alarm rang.

    This uses the European Portuguese progressive style (estar a + infinitive) as the background.

  5. Quando ela chegou, eu ainda trabalhava.

    When she arrived, I was still working.

    Word by Word: When she arrived [preterite], I still worked [imperfect].

    Here, the 'quando' clause comes first, but the logic remains: her arrival is the punctual event.

Common Mistakes

  • Using the Preterite for both the background and the punctual event when intending to show interruption.

    Eu estudei quando o telefone tocou.
    Eu estudava quando o telefone tocou.

    While 'Eu estudei quando o telefone tocou' is grammatically possible, it describes a sequence (I finished studying once the phone rang). To show that the phone rang while you were in the middle of studying, you must use the Imperfect for the background action.

  • Confusing past 'when' with future 'when'.

    Quando ele chegar, eu fiquei feliz.
    Quando ele chegou, eu fiquei feliz.

    If the event already happened, use the Preterite (chegou). The form 'chegar' is the Future Subjunctive, used for things that haven't happened yet.

How It Connects

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

quando + PreteriteLevel 2Quando (Interruption)

Learn This First

To use 'quando' for interruptions, you need to understand the Pretérito Perfeito for the specific interrupting event and the Pretérito Imperfeito for the ongoing background action that was happening at that time.

Words in This Pattern

quando