si no hubieran

if they hadn't

→ si
phrase Rare #36,329
if they hadn't Used in conditional sentences to talk about unreal past situations. The exact subject can vary from context.
SP: Si no hubieran venido, no habría problema.
EN: If they hadn't come, there would be no problem.

Si no hubieran bailado así, habría sido una noche más.

If they hadn't danced like that, it would have been just another night.

— Mystic River (2003)

Hagan como si no hubieran visto nada.

Pretend you didn’t see anything.

Si no hubieran llegado me habrían matado.

If they hadn't arrived, they would have killed me.

— Tropa de élite (2007)

Yo sería más feliz si no hubieran estado.

I would be happier if they weren't there.

Habría sido mucho mejor si no hubieran sido hombres.

It would have been much better if they hadn't been men.

— Love Actually (2003)

Si no hubieran cerrado el VCAT, ya habría algún arresto.

If they hadn't closed the VCAT, there would have been some arrests by now.

— El botín (2026)

Si no hubieran venido ellos.

If they hadn't come.

— Nausicaä del valle del viento (1984)