Elvin is having an English lesson.
(-) Elvin isn't having an English lesson.
(?) Is Elvin having an English lesson?
It's Nazrin's birthday.
(-) It isn't Nazrin's birthday.
(?) Is it Nazrin's birthday?
Anna is at the cinema.
(-) Anna isn't at the cinema.
(?) Is Anna at the cinema?
The water is warm.
(-) The water isn't warm.
(?) Is the water warm?
Bob is in the stadium.
(-) Bob isn't in the stadium.
(?) Is Bob in the stadium?
She is in bed.
(-) She isn't in bed.
(?) Is she in bed?