si no hacemos algo

if we don't do something

→ si
phrase Rare #44,066
if we don't do something Used to express a warning or a need to act.
SP: Si no hacemos algo ahora, será demasiado tarde.
EN: If we don't do something now, it'll be too late.

Si no hacemos algo pronto tu hija no será la única que sufra.

If we don't do something soon, your daughter won't be the only one who suffers.

— El Extraño (2016)

Pero perderemos prestigio si no hacemos algo.

But we will lose prestige if we don't do something.

— Porco Rosso (1992)

Si no hacemos algo por lo de esta noche todos moriremos.

If we don't do something about tonight, we will all die.

— Your Name (2016)

Si no hacemos algo, la naturaleza lo hará.

If we don't do something, nature will do it.