What were you doing yesterday at 3.00?
I was trampolining.
What was she doing yesterday at 2:45?
She was rollerblading.
What was he doing yesterday at 5.00?
He was drawing.
What were they doing yesterday at 1.15?
They were running races.
Was he drawing pictures?
No, he wasn't.
Was she acting?
Yes, she was.
Were they running races?
No, they weren't.
Were they telling jokes?
Yes, they were.
