no debes hablar

you must not speak

→ no
phrase Uncommon #16,207
you must not speak Used to give a prohibition or strong warning. In context, it can also mean “you shouldn’t talk.”
SP: No debes hablar durante la clase.
EN: You must not speak during class.

No debes hablar en voz alta.

You shouldn't speak loudly.

No debes hablar nunca de lo sucedido esta noche.

You must never speak of what happened tonight.

— La maldición de la flor dorada (2006)

No debes hablar de la gente a sus espaldas.

You shouldn't talk about people behind their backs.

No debes hablar.

You must not speak.

No debes hablar jamás.

You must never speak.

— La vida es bella (1997)

No debes hablar así de mamá.

You shouldn't talk about your mom like that.

— “Cumbres Borrascosas” (2026)

No debes hablar tan fuerte aquí.

You shouldn't speak so loudly here.