I doubt
Dudo incluso mientras escribo esta carta.
I have doubts even as I write this letter.
— Sympathy for Mr. Vengeance (2002)
Aunque estés rico, dudo que seas feliz.
Even if you're rich, I doubt you're happy.
Si tienes algo de tiempo, cosa que dudo, hecha un vistazo a esto.
If you have some time, which I doubt, take a look at this.
Aunque a veces dudo si no los obligan.
Although sometimes I wonder if they aren't being forced.
— Taxi Express (1998)
Dudo mucho que haya terminado el informe a tiempo para la presentación.
I highly doubt I finished the report in time for the presentation.
No dudo en su capacidad para hacerlo.
I don't doubt his ability to do it.
I doubt he'll arrive on time.
I doubt he'll come.