tienes que saber

you have to know

→ tener
phrase Uncommon #12,604
you have to know Used to express that someone needs or is required to know something.
SP: Tienes que saber cuándo parar.
EN: You have to know when to stop.

Tienes que saber si hay agua caliente.

You have to find out if there’s hot water.

— Perros de Reserva (1992)

Tienes que saber lo que estás haciendo.

You have to know what you're doing.

Primero tienes que saber el ritmo.

First you need to know the rhythm.

— Picnic (1955)

Tienes que saber todo.

You have to know everything.

— Perros de Reserva (1992)

Tienes que saber que Hermann no está aquí.

You have to know that Hermann isn’t here.

— La Caída (2004)

Hay algo que tienes que saber.

There's something you need to know.

Tienes que saber.

You have to know.

— Incendios (2010)

Eso es todo lo que tienes que saber.

That's all you need to know.

Tienes que saber que estoy enamorado de María.

You have to know that I’m in love with María.

Tienes que saber eso.

You need to know that.

Cuando haces mucho, tienes que saber como manejarlo.

When you do a lot, you have to know how to handle it.