knew, were familiar with
Ya nos conocíamos de antes, del curso del verano pasado.
We already knew each other from before, from last summer's course.
We all knew her.
So we didn't know each other then.
Éste es el final de Europa tal y como la conocíamos.
This is the end of Europe as we knew it.
Tu madre y yo nos conocíamos muy bien.
Your mother and I knew each other very well.
— Les invasions barbares (2003)
We knew them very well.