Affirmative answer form
Yes, I was.
Yes, you were.
Yes, he was.
Yes, she was.
Yes, it was.
Yes, we were.
Yes, they were.
Negative answer (long) form
No, I was not.
No, you were not.
No, he was not.
No, she was not.
No, it was not.
No, we were not.
No, they were not.
Negative (contracted) form
No, I wasn´t.
No, you weren´t.
No, he wasn´t.
No, she wasn´t.
No, it wasn´t.
No, we weren´t.
No, they weren´t.