ver to be past form

Similar to the Present simple tense, The simple past is divided in two main parts. The form with the “to be” and with “other verbs. you use past time expressions for to say the phases in past with this verb and help to be in a totally past form.

to be in past: (was and were)
I - was
you - were
he - was
she - was
it - was
we - were
they were

past time expressions:
yesterday - ayer
last week - semana pasada
last weekend - fin de semana pasada
last month - mes pasado
last year - año pasado
last vacations - vacaciones pasadas
last season (summer, winter, autumn, spring)

Grammar Structure:

subject + was/were + complement

I was in he mall yesterday
last weekend you were in the park
last sunday Angelica was in the school
Samuel was in his grand father's house last summer
the cat was in the pet shop yesterday
we were in a party last week
they were in cartagena last year