This document provides guidance on using the contractions wasn't and weren't in speaking and informal writing to indicate that something was not the case. It also explains that to ask a yes/no question, was or were should be placed before the subject of the question.

3. Use the contractions wasn’t and weren’t in speaking and informal
writing:
I wasn’t alone.
You weren’t at home.

4. To ask a yes/ no question, put was or were before the subject:
subject
Was the movie interesting?
subject
Were you alone at the movie?