Past continuous

We use the Past Continuous to talk about something in the past that continued before and another action...

e.g. 'I was reading a book when the telephone rang'

Also to express something that happened again and again...

e.g. 'My throat was aching'

So then:
                   
Pronoun +   was    + verb -ing + ...
                    were

** What if we want to say something that was not happening?

e.g. 'I wasn´t writing in French when my sister arrived'
       'I was´t reading a book when my sister arrived'
       'They weren´t doing the exam when María interrupted'
                  
                      
    
Pronoun +    was not      + verb -ing + ...
                  
                     were not

** If we want to ask about something that was happening in the past we use:

 
was       + pronoun + verb -ing + ... + ?
were

e.g. 'Were you reading the blog when Sonia called?'