debes estar atento

you should be alert

→ deber
phrase Rare #35,322
you should be alert Atento changes to atenta when referring to a woman. Often followed by a or de to say what someone should be alert to.
SP: Debes estar atento al tráfico.
EN: You should be alert to traffic.

Hasta ese día, debes estar atento y vigilarla.

Until that day, you must be attentive and keep an eye on her.

— Ne Zha (2019)

Debes estar atento de los carteristas.

You must be on the lookout for pickpockets.

Y dime, ¿no hubo nadie que te dijera que debes estar atento y debes escucharlo?

And tell me, was there no one who told you that you need to pay attention and listen to him?

— Pinocho (2019)

Debes estar atento.

You must be alert.

— Dolor y gloria (2019)

¡Tú debes estar atento!

You need to pay attention!

— Pinocho (2019)

Debes estar atento a los enemigos.

You need to watch out for enemies.

— Avatar: El camino del agua (2022)