I must harbinger you must harbinger she must harbinger we must harbinger you must harbinger they must harbinger
V-ing form
I must be harbingering you must be harbingering she must be harbingering we must be harbingering you must be harbingering they must be harbingering
Perfect
I must have harbingered you must have harbingered she must have harbingered we must have harbingered you must have harbingered they must have harbingered
V-ing perfect
I must have been harbingering you must have been harbingering she must have been harbingering we must have been harbingering you must have been harbingering they must have been harbingering
Negation
Simple form
I must not harbinger you must not harbinger she must not harbinger we must not harbinger you must not harbinger they must not harbinger
V-ing form
I must not be harbingering you must not be harbingering she must not be harbingering we must not be harbingering you must not be harbingering they must not be harbingering
Perfect
I must not have harbingered you must not have harbingered she must not have harbingered we must not have harbingered you must not have harbingered they must not have harbingered
V-ing perfect
I must not have been harbingering you must not have been harbingering she must not have been harbingering we must not have been harbingering you must not have been harbingering they must not have been harbingering
Interrogative form
Simple form
must I harbinger? must you harbinger? must she harbinger? must we harbinger? must you harbinger? must they harbinger?
V-ing form
must I be harbingering? must you be harbingering? must she be harbingering? must we be harbingering? must you be harbingering? must they be harbingering?
Perfect
must I have harbingered? must you have harbingered? must she have harbingered? must we have harbingered? must you have harbingered? must they have harbingered?
V-ing perfect
must I have been harbingering? must you have been harbingering? must she have been harbingering? must we have been harbingering? must you have been harbingering? must they have been harbingering?
Interro-negative form
Simple form
must I not harbinger? must you not harbinger? must she not harbinger? must we not harbinger? must you not harbinger? must they not harbinger?
V-ing form
must I not be harbingering? must you not be harbingering? must she not be harbingering? must we not be harbingering? must you not be harbingering? must they not be harbingering?
Perfect
must I not have harbingered? must you not have harbingered? must she not have harbingered? must we not have harbingered? must you not have harbingered? must they not have harbingered?
V-ing perfect
must I not have been harbingering? must you not have been harbingering? must she not have been harbingering? must we not have been harbingering? must you not have been harbingering? must they not have been harbingering?