si no (condicional negativo)

if not (negative conditional)

Conditionals & Hypotheses

Notes & Usage:

Conditional/hypothetical expression

Practica más, si no, no aprobarás el examen.

Practice more, if not, you won't pass the exam.

Debes avisar con tiempo, si no, no podremos ayudarte.

You must give notice in advance, if not, we won't be able to help you.

—¿Confirmaste la cita? —Sí, si no, habría llamado para avisar.

—Did you confirm the appointment? —Yes, if not, I would have called to let them know.

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