Question

Quando a gente usa Was ou Were?

Answer 1

I was
You were 
He was
She was
It was
We were
You were
They were

Answer 2

Olá, espero poder ajudar! 

Voce usa Was/Were para indicar ações no passado: 

We were at the club yesterday (Nós estávamos no clube ontem.) 
Use WERE para I, you, we, they. 

Use WAS para he, she, it. 

I was at the bank last night. (eu estava no banco ontem á noite) 

Pode usar no Present Continuous > I was reading a good Spanish book. (eu estava lendo um bom livro espanhol) 

Were you calling me? (Você estava me chamando?) 

espero ter ajudado