Формула:
(+) местоимение+are, is ,am+Ving+....
(-) местоимение +are, is, am+not+Ving+...
(?) Are,is?am+местоимение+Ving+...
Спутники: now, at the moment
You are working in the garden now (+) You are not working now. (-) Are You working now? (?)
They are watching TV now. (+) They are not watching TV now. (-) Are They watching TV now? (?)
He is smiling now. (+) He isn't smiling now. (-) Is he smiling? (?)