should have, ought to have
Debí haberle contestado antes a Chris Markofferson.
I should have replied to Chris Markofferson sooner.
Eso es lo que debí haber dicho.
That's what I should have said.
Dicho eso, hay algo que debí decir antes.
That said, there's something I should have said earlier.
— Bugonia (2025)
Debí de parecer poco convencida —.
I must have seemed unconvinced—.
Lo que debí haber hecho hace tiempo.
What I should have done a long time ago.
Debí flotar en la espiral del tiempo.
I must have drifted through the spiral of time.
— Durante la tormenta (2018)