3a.
Where are you now? - I am sitting in the living room.
What aren't you doing? - I am not watching television
What are you doing now? - I am doing this exersise.
3b.
They are working now. And they are not relaxing now. My granny is in the shop now. But my grandad is in the office. He isn't laughing. He is working now. And I am at home in our living room. I am not watcing television, I am doing this exersise.