Question

reglas was were con ejemplos

Answer 1

they were playing games

she was a nurse

I was a bad school

Answer 2

was y were son una forma de decir estaba , estaban , estabamos , etc la podes derivar como quieras.
la unica diferencia entre los dos es que :
WAS se usa para la persona I , SHE , HE , IT  , ejemplo: she was in the school on wednesday morning
WERE se usa para las personas YOU , WE, THEY , ejemplo : WE WERE IN THE SCHOOL ON WEDNESDAY MORNING

Y A CUALQUIERA DE LAS DOS LAS PODES PONER EN NEGATIVO , PARA DECIR QUE NO . EJEMPLO
SHE WASN`T IN THE SCHOOL ON WEDNESDAY MORNING

WE WEREN`T IN THE SCHOOL ON WEDNESDAY MORNING