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