Question

regras verbo to be no passado afirmativa negativa interrogativa passado? gostaria de saber, por favor.

Answer 1

To be no passado= "was" para pessoas no singular e "were" para pessoas no plural.
I was
You were
she/he/it was
You were
We were
They were

Na negativa o mesmo esquema:
I wasn't
You weren't
she/he/it wasn't
You weren't 
We weren't
They weren't

E na interrogativa o verbo vai para frente:
Was I?
Were you?
Was she/he/it?
Were you?
Were we?
Were they?