I must do it
Aunque sea duro, debo hacerlo.
Even though it's hard, I have to do it.
Nunca quise preguntarte esto, pero debo hacerlo.
I never wanted to ask you this, but I have to.
— Hierro 3 (2004)
Clara, no quería decir nada, pero debo hacerlo.
Clara, I didn't want to say anything, but I have to.
— Doña Clara (2016)
I must not do it.