kalimat tersebut dijadikan kalimat present tense : (+) i am studying english now (-) i am not studying (?)i am studing enghlish now?

1.my uncle is visiting his children in Jakarta (+)
my uncle is not visiting his children in Jakarta(-)
is my uncle visiting his children in Jakarta(?)
2.karin's mother is cooking fried rice in the kitchen(+)
karin's mother is not cooking fried rice in the kitchen(-)
is karin's mother cooking fried rice in the kitchen(?)
3.the gardener is watering the flower in the garden(+)
the gardener is not watering the flower in the garden(-)
is gardener watering the flower in the garden(?)
4.the children are playing ball in the yard(+)
the children are not playing ball in the yard(-)
are the children playing ball in the yard(?)
5.we are doing english homework(+)
we are not doing engliah homework(-)
are we doing english homework(?)

semoga benar yaa