1.Hoa and Hung is flying a kite
⇒ Hoa and Hung is not flying a kite
⇒Are Hoa and Hung flying a kite?
2.My father is reading book.
⇒ My father is not reading book
⇒ Is my father reads book?
3.My mother and I are cooking
⇒My mother and I are not cooking
⇒ Are my mother and I cooking?
4.My grandma is listen to music
⇒My grandma is not listening to music
⇒Is my grandma listening to music?