Question

cuando se utilaza was y werw

Answer 1

El was y el were son el pasado del verbo to be que significa ser o estar y se usan con los siguientes ponombres:
I was, You were, He was, She was, It was, We were, You were, They were. Ejemplos:
I was here last week: Yo estuve aquí la semana pasada.
They were here last week: Ellos estuvieron aquí la semana pasada.