1. (-) My grandfather isn't buying some fruits at the supermarket.
(?) Is my grandfather buying some fruits at the supermarket? 
2. (-) All of Jack's friends aren't having fun at the concert right now.
 (?) Are all of Jack's friends having fun at the concert right now?
3. (-) My children aren't traveling around Asia now.
(?) Are my children traveling around Asia now?
4. (-) My litter brother isn't drinking milk.
(?) Is my litter brother drinking milk?
5. (-) Lister! Our teacher isn't speaking.
(?) Lister! Is our teacher speaking?
6. (+) Hannah is studying Freach in the library.She at home with her classmaites.
(?) Is Hannah studying Freach in the library.She at home with her classmaites? 
7. (+) She is running in the park.
(-) She isn't running in the park.
8. (-) I am feeding my dog now.
(?) Am I feeding my dog now?
9. (+) You are waiting for lunch.
(-) You aren't waiting for lunch.
10. (+) Their students are trying hard enough in the cometition.
(?) Are their students trying hard enough in the cometition?