Question

montagem do past continuous no interrogativo

Answer 1

As frases afirmativas no past contínuous são compostas do sujeito mais o verbo TO BE no passado, seguido do gerúndio do verbo principal. Veja alguns exemplos:- They were reading (eles estavam lendo)
- I was learning (eu estava aprendendo)* Lembrete: tabela do verbo TO BE no passado:I - Was
You - Were
He - Was
She - Was
It - Was
We - Were
You - Were
They - Were

Answer 2

No past continuous põe-se o verb to be in the past. Na forma interrogativa fica:

Was/Were I ?
Were You?
Was He/she ? 
Was it?
Were they?

No caso do pronome I pode ser utilizado as duas formas.