Question

change to passive :-
I have been studying since morning

Answer 1

Hey frnd...
There is no change in this sentence.. Because There is no object in it.

Answer 2

$\mathbb{\red{\huge{HEY\:MATE}}}$

$\boxed{HERE\:IS\:YOUR\:ANSWER}$

$\mathfrak{\green{ANSWER:}}$

I THINK IT CANNOT BE CHANGED BRO....

THERE IS NO OBJECT IN IT....

$\mathbb{\red{\huge{HEY\:MATE}}}$

$\boxed{HERE\:IS\:YOUR\:ANSWER}$

$\mathfrak{\green{ANSWER:}}$