Portuguese Phrase
Se as luzes piscam, é sinal de atividade.
Meaning
The sentence means that when the lights start flashing, it indicates that something is happening or that there is movement. It can be used literally (e.g., a machine’s indicator lights) or metaphorically (e.g., a city’s nightlife).
When to use
Use this phrase when you want to point out a visual cue that signals activity, such as warning lights on equipment, blinking traffic signals, or even metaphorical ‘lights’ that suggest a bustling environment.
✦Grammar Breakdown
Seasluzespiscam,ésinaldeatividade.
Conditional 'Se'
The word 'se' introduces a conditional clause, similar to 'if' in English.
Definite article 'as'
Used before a plural feminine noun (luzes) to mean 'the'.
Verb conjugation - 'piscam'
Third‑person plural present of 'piscar' (to flash), agreeing with 'luzes'.
Copula 'é'
Third‑person singular present of 'ser', linking the subject 'sinal' to its description.
Noun phrase 'sinal de atividade'
Literally 'sign of activity'; 'de' shows possession or relation.
🗨In Conversation
Se as luzes piscam, é sinal de atividade.
If the lights flash, it's a sign of activity.
Então vamos investigar o que está acontecendo.
Then let's investigate what's going on.
✕Common Mistakes
Se as luzes pisca, é sinal de atividade.
Do not use the singular 'pisca' because the subject 'luzes' is plural.
Se as luzes piscam, está sinal de atividade.
Avoid using 'está' here; 'é' expresses a permanent characteristic, while 'está' would imply a temporary state.
Se as luzes piscam, é sinal de ativídade.
Do not translate directly to 'atividade' with an accent on the wrong syllable; the stress is on the penultimate syllable.
↔Alternatives
Quando as luzes piscam, indica que há movimento.
When the lights flash, it indicates that there is movement.
Se as luzes acendem intermitentemente, significa que algo está ativo.
If the lights turn on intermittently, it means something is active.
Luzes piscando são um indício de atividade.
Flashing lights are an indication of activity.
Cultural Tip
In Brazil, blinking lights are often associated with safety warnings (e.g., on construction sites) or festive decorations during Carnaval. Using this phrase in a technical context is perfectly natural, but in casual conversation it can also be a playful way to comment on a lively atmosphere.