lo siento, no sabía que

I'm sorry, I didn't know that

→ lo
phrase Rare #45,001
I'm sorry, I didn't know that Typically introduces an explanation or information the speaker was unaware of.
SP: Lo siento, no sabía que estabas enfermo.
EN: I'm sorry, I didn't know you were sick.

Lo siento, no sabía que fuera una reunión formal.

I'm sorry, I didn't know it was a formal meeting.

— Pacto de sangre (1944)

Lo siento, no sabía que esta iba a ser la hora de los niños.

Sorry, I didn't know this was going to be the children's time.

— Proyecto: El Internado (2026)

Lo siento, no sabía que fueran tan cercanos.

I'm sorry, I didn't know they were so close.

— Había una vez en Hollywood (2019)

Lo siento, no sabía que fuera su mujer.

I'm sorry, I didn't know she was your wife.

— Kung fu (2004)

Lo siento, no sabía que pensabas así.

I'm sorry, I didn't know you thought that way.

— Madre (2009)

Lo siento, no sabía que fuera un secreto.

I'm sorry, I didn't know it was a secret.