1、I was We were
You were （not）a student. You were （not） students.
He was They were
She was
It was （not） a cock.. They were （not） cocks.
2、Was I ...?
Yes, you were.
No, you weren't.
Were you ...?
Yes, I was.
No, I wasn't.
Was he （she，it）...?
Yes, he （she，it）was.
No, he （she，it）wasn't.
Were we ...?
Yes, we （you） were.
No, we （you） weren't.
Were you ...?
Yes, we were.
No, we weren't.
Were they ...?
Yes, they were.
No, they weren't.