(+)
1. I'm learning Enhlish at the moment.
2. I'm watching a video now.
3. I'm writing a text at the moment.
(-)
1. I'm not eating now.
2. I'm not sleeping at the moment.
3. I'm not taking a shower at the moment.
(?)
1. Am I sleeping now?
2. Am I playing video games at the moment?
3. Am I teaching you English?