verb to be pasr form (negative and interrogative)

Negative form:
was not = wasn't / were not =weren't

Grammar Structure:

Subject + wasn't/weren't + complement

I wasn't in the zoo last month
you weren't in the museum yesterday
Camilo wasn't in the classroom last year
Sonia wasn't in the national park


Interrogative form:

Grammar Structure:

was/were + subject + complement + ?

was the dog in the street last winter?
yes, it was / no, it wasn't

were we in the hospital?
were they in the hotel last saturday?
was the lion in the zoo last night?