$\textrm{1. (-) They aren't cooking in the kitchen now}$

$\textrm{   (?) Are they cooking in the kitchen now?}$

$\textrm{2. (-) There aren't 4 pens on the table}$

$\textrm{   (?) Are there 4 pens on the table}$

$\textrm{3. (-) My father doesn't watch TV every day}$

$\textrm{   (?) Does your father watch TV every day?}$

$\textrm{4. (-) She isn't having dinner at the moment}$

$\textrm{   (?) Is she having dinner at the moment?}$

1, they’re cooking in the kitchen now

=> (-)they’re not cooking in the kitchen now 

       (?)Are thay cooking in the kitchen now ?
2, there’re 4 pens on the table 

=> (-)there’re not 4 pens on the table 

       (?) Are there 4 pens on the table ?

3, My father watches tv everyday

=> (-)My father doesn't  watch tv everyday 

       (?)Does my father watch tv everyday?

4, she’s having a dinner at the moments

=> (-) she’s not having a dinner at the moments

       (?) Is she having a dinner at the moments?

#NOCOPY