had no idea
No tenía ni idea de quién era.
I had no idea who he was.
El pobre chico no tenía ni idea de qué hacer.
The poor boy had no idea what to do.
No tenía ni idea de dónde estabas.
I had no idea where you were.
No tenía ni idea que supieras tanto sobre esas cosas.
I had no idea you knew so much about those things.
— स्वदेस (2004)
No tenía ni idea de quién eran o cómo habían llegado allí.
I had no idea who they were or how they had gotten there.
— It's Such a Beautiful Day (2012)
Al principio, no tenía ni idea del porqué.
At first, I had no idea why.