estuvieron intercambiando
-they/you were exchanging
Preterite progressiveellos/ellas/ustedesconjugation ofintercambiar.

intercambiar

El otro día coincidieron en San Juan las dos guías y estuvieron intercambiando impresiones.
The other day San Juan agreed and the two guides were exchanging impressions.
Claro está que, incluso antes de que el concepto de Transmisión (y sus efectos) fuera enseñado, los buscadores estuvieron intercambiando sus experiencias.
Of course, even before the concept of Transmission (and its effects) was taught, seekers were swapping their experience stories.
Word of the Day
to dive