you must keep
Siempre debes mantener el cuarto limpio.
You should always keep the room clean.
Debes mantener limpia tu pieza.
You must keep your room clean.
Debes mantener tus dientes limpios.
You must keep your teeth clean.
Debes mantener tu lealtad a la familia.
You must maintain your loyalty to the family.
Debes mantener tus zapatos limpios.
You must keep your shoes clean.
Aprende a reconocer cuándo te debes mantener callado y cuándo debes hablar.
Learn to recognize when you should remain silent and when you should speak.
Así que debes mantener la velocidad.
So you need to maintain your speed.
— El salario del miedo (1953)