didn't know whether
No sabía si quería ir a la universidad.
I didn't know if I wanted to go to college.
Lo miré, pero no sabía si era el mío o el suyo.
I looked at it, but I didn't know if it was mine or his.
— Dil Se.. (1998)
Tom no sabía si la voz era masculina o femenina.
Tom didn't know whether the voice was male or female.
No sabía si alguna vez volvería a tener un pastel así.
I didn't know if I would ever have a cake like that again.
— Sed de Sangre (2009)
La mujer no sabía si aceptar su propuesta o no.
The woman didn't know whether to accept his proposal or not.
I said I didn’t know if you could.
— Kiki: Entregas a Domicilio (1989)
Tom no sabía si reír o llorar.
Tom didn’t know whether to laugh or cry.
No sabía si le habían dado el recado.
I didn't know if they had given him the message.
— Con Ánimo de Amar (2000)