(+) You are working in the garden now.(-) You are not working in the garden now.(?) Are you working in the garden now?
(+) They are watching TV now.(-) They are not watching TV now.(?) Are they watching TV now?
(+) He is smiling now.(-) He is not smiling now.(?) Is he smiling now?
(+) You are working in the garden now.
(-) You are not working in the garden now.
(?) Are you working in the garden now?
(+) They are watching TV now.
(-) They are not watching TV now.
(?) Are they watching TV now?
(+) He is smiling now.
(-) He is not smiling now.
(?) Is he smiling now?