I could deprave you could deprave he could deprave we could deprave you could deprave they could deprave
V-ing form
I could be depraving you could be depraving he could be depraving we could be depraving you could be depraving they could be depraving
Perfect
I could have depraved you could have depraved he could have depraved we could have depraved you could have depraved they could have depraved
V-ing perfect
I could have been depraving you could have been depraving he could have been depraving we could have been depraving you could have been depraving they could have been depraving
Negation
Simple form
I could not deprave you could not deprave he could not deprave we could not deprave you could not deprave they could not deprave
V-ing form
I could not be depraving you could not be depraving he could not be depraving we could not be depraving you could not be depraving they could not be depraving
Perfect
I could not have depraved you could not have depraved he could not have depraved we could not have depraved you could not have depraved they could not have depraved
V-ing perfect
I could not have been depraving you could not have been depraving he could not have been depraving we could not have been depraving you could not have been depraving they could not have been depraving
Interrogative form
Simple form
could I deprave? could you deprave? could he deprave? could we deprave? could you deprave? could they deprave?
V-ing form
could I be depraving? could you be depraving? could he be depraving? could we be depraving? could you be depraving? could they be depraving?
Perfect
could I have depraved? could you have depraved? could he have depraved? could we have depraved? could you have depraved? could they have depraved?
V-ing perfect
could I have been depraving? could you have been depraving? could he have been depraving? could we have been depraving? could you have been depraving? could they have been depraving?
Interro-negative form
Simple form
could I not deprave? could you not deprave? could he not deprave? could we not deprave? could you not deprave? could they not deprave?
V-ing form
could I not be depraving? could you not be depraving? could he not be depraving? could we not be depraving? could you not be depraving? could they not be depraving?
Perfect
could I not have depraved? could you not have depraved? could he not have depraved? could we not have depraved? could you not have depraved? could they not have depraved?
V-ing perfect
could I not have been depraving? could you not have been depraving? could he not have been depraving? could we not have been depraving? could you not have been depraving? could they not have been depraving?