desde que éramos niños

since we were children

→ desde
phrase Rare #36,692
since we were children Used to say something started in childhood and continues or has been true since then.
SP: Nos conocemos desde que éramos niños.
EN: We’ve known each other since we were children.

Ha sido así desde que éramos niños.

It's been this way since we were kids.

Diciéndome lo que tenía que hacer, desde que éramos niños.

Telling me what to do, ever since we were children.

— Akira (1988)

Conozco a Jim desde que éramos niños.

I've known Jim since we were children.

Nos conocemos el uno al otro desde que éramos niños.

We've known each other since we were children.

He sido amigo de él desde que éramos niños.

I have been friends with him since we were children.

Nos conocemos desde que éramos niños.

We've known each other since we were kids.

Desde que éramos niños.

Since we were children.

— Mystic River (2003)