Past simple: « to be »: I was
We use the Past Simple to refer about completed actions in the past.
I, he, she, it, John was,
We, You, they, my brothers were,
He, she, it
Negative form: was/were + NOT
was not => wasn’t I wasn’t at school last week.
were not => weren’t We weren’t at school last week.
Interrogative form: was/were + Subject
Was he at school yesterday?
Were you at the party last night?