Question

Estrutura do past continuous

Answer 1

relembrando to be no past:
I was
You were
He was
She was
It was
we were
you were
they were

a formação do past continuous é basicamente o sujeito mais o verbo to be no past mais o verbo com ing.
ex: they were buying clothes. eles estavam comprando roupas
were they buying clothes?
they weren't buying clothes
VERB TO BE PAST+ PRINCIPAL VERB COM ING

Answer 2

Past Continuous: sujeito + passado simples do verbo to be + gerúndio do verbo principal (-ing).