O Verbo To be (Passado)

O verbo to be, no passado, utiliza 2 conjugações, was e were. O was é usado para a primeira e terceira pessoas do singular (I, he/she/it), e o were é usado para as restantes:

Affirmative form (forma afirmativa)

Use a forma was para I, he, she, it e were para as demais pessoas:
I was (eu era ,eu estava)
you were ( você era ,você estava)
he was (ele era ,ele estava)
she was (ela era, ela estava)
it was (ele(a) era, ele(a) estava)
we were (nós éramos, nós estávamos)
you were (vocês eram, vocês estavam )
they were (eles(as) eram ,eles(as) estavam)

Negative form (forma negativa)

Usam-se as formas negativas wasn’t (was not) para I, he, she, it e weren’t( were not) para as demais pessoas.
I wasn’t
you weren’t
he wasn’t
she wasn’t
it wasn’t
we weren’t
you weren’t
they weren’t

Interrogative form (forma interrogativa)

As perguntas se formam com a anteposição do verbo to be ao sujeito:
was I …?
were you…?
was he…?
was she…?
was it…?
were we…?
were you…?
were they…?

Exemplos:
Where were you? (Onde você estava?)
Was she home?(Ela estava em casa?)
He wasn’t there. (Ele não estava lá.)
When I was a child, I was very naughty.(Quando eu era criança, eu era muito levado.)
You were happy. (Você estava feliz.)
Were you at the party? ( Você estava na festa? )
Yes, I was.(Sim, estava.)
No, I wasn’t. (Não, não estava).

NOTE: O passado de are é were e o passado de is é was. O passado de am é was também.

Abraço a todos!!