doubted, was unsure
Dudaba que fuera al concierto porque no le gusta ese tipo de música.
I doubted she would go to the concert because she doesn't like that type of music.
Quiere decir que dudaba de la paternidad del niño.
It means that he doubted the child's paternity.
— Chicago (2002)
Tom dudaba que Mary le devolviera la llamada.
Tom doubted that Mary would return his call.