Present simple:
She likes to talk to her friends.
Does she like to talk to her friends?
She doesn't like to talk to her friends.
Present continuous:
They are working hard now.
Are they working hard now?
They are not working hard now.
Past continuous:
You were having lunch from 12:30 till 1 pm yesterday.
Were you having lunch from 12:30 till 1 pm yesterday?
You weren't having lunch from 12:30 till 1 pm yesterday.