debes saber

you must know

→ deber
phrase Uncommon #20,192
you must know Depending on context, debes can express strong advice as well as obligation. Saber can mean knowing a fact or knowing how to do something.
SP: Debes saber que siempre puedes contar conmigo.
EN: You should know that you can always count on me.

No sólo debes saber decir las palabras, también debes saber tocar al oponente.

You must not only know how to say the words, but also how to touch the opponent.

— Ip Man (2008)

Empecemos mi lista de cosas que debes saber.

Let's start my list of things you should know.

Hay cosas que debes saber.

There are things you should know.

— Five Nights at Freddy's 2 (2025)

Hay algo que debes saber.

There's something you should know.

Debes saber que yo ronco.

You should know that I snore.

Debes saber eso si quieres entrar en la música.

You should know that if you want to get into music.

Algo que debes saber sobre mí es que estoy profundamente en deuda.

Something you should know about me is that I’m deeply in debt.

Debes saber qué matar.

You need to know what to kill.

— El hombre de la tierra (2007)

Solo debes saber que tenemos un aliado allí.

You just need to know that we have an ally there.

— El agente secreto (2025)

Debes saber perdonar para ser feliz.

You must know how to forgive in order to be happy.

Tú debes saber mucho de computación.

You must know a lot about computers.

— Masaan 2015 (2015)

Pero hay algo que debes saber.

But there is something you should know.

Hay más de mi que debes saber.

There's more about me you should know.

Debes saber todo lo que hizo el médico.

You should know everything the doctor did.

— पीकू (2015)

Hay algo que debes saber de tu padre.

There is something you should know about your father.

Si te casas conmigo, debes saber cuándo miento.

If you marry me, you need to know when I’m lying.

— Paris, je t'aime (2006)

Debes saber que casi matas a tu hermano.

You should know that you almost killed your brother.

— Avatar: El camino del agua (2022)

Tú debes saber, Capitán, de dónde viene este bello fusil.

You must know, Captain, where this beautiful rifle comes from.

— Horas de terror (1997)

Debes saber a qué me refiero.

You must know what I mean.

— Song Sung Blue: Sueño inquebrantable (2025)

Y debes saber que yo voy a seguir tratando de que estés siempre saludable.

And you should know that I will keep trying to ensure you are always healthy.

— Hoy Quiero Volver Solito (2014)