se dieron cuenta

they realized

→ se
phrase Rare #33,392
they realized Past-tense form of darse cuenta, meaning “to realize” or “to become aware.” It is usually followed by de: se dieron cuenta de que... means “they realized that...”
SP: Se dieron cuenta de que habían tomado el camino equivocado.
EN: They realized that they had taken the wrong road.

Ellos estaban tan ocupados que no se dieron cuenta de la hora que era.

They were so busy that they didn't realize what time it was.

De repente se dieron cuenta de un ruido en la parte de atrás de la habitación.

Suddenly they noticed a noise at the back of the room.

No todos se dieron cuenta.

Not everyone noticed.

Ellos se dieron cuenta de que podrían morir.

They realized they could die.

Los cerdos finalmente se dieron cuenta.

The pigs finally realized it.

— Sin novedad en el frente (2022)

Suspiró alto y todos se dieron cuenta de que algo le preocupaba.

He sighed loudly and everyone realized that something was bothering him.

Ellos estaban tan ocupados que no se dieron cuenta de qué hora era.

They were so busy that they didn’t realize what time it was.

Todos se dieron cuenta de que mentía.

Everyone realized he was lying.