I must cheer you must cheer she must cheer we must cheer you must cheer they must cheer
V-ing form
I must be cheering you must be cheering she must be cheering we must be cheering you must be cheering they must be cheering
Perfect
I must have cheered you must have cheered she must have cheered we must have cheered you must have cheered they must have cheered
V-ing perfect
I must have been cheering you must have been cheering she must have been cheering we must have been cheering you must have been cheering they must have been cheering
Negation
Simple form
I must not cheer you must not cheer she must not cheer we must not cheer you must not cheer they must not cheer
V-ing form
I must not be cheering you must not be cheering she must not be cheering we must not be cheering you must not be cheering they must not be cheering
Perfect
I must not have cheered you must not have cheered she must not have cheered we must not have cheered you must not have cheered they must not have cheered
V-ing perfect
I must not have been cheering you must not have been cheering she must not have been cheering we must not have been cheering you must not have been cheering they must not have been cheering
Interrogative form
Simple form
must I cheer? must you cheer? must she cheer? must we cheer? must you cheer? must they cheer?
V-ing form
must I be cheering? must you be cheering? must she be cheering? must we be cheering? must you be cheering? must they be cheering?
Perfect
must I have cheered? must you have cheered? must she have cheered? must we have cheered? must you have cheered? must they have cheered?
V-ing perfect
must I have been cheering? must you have been cheering? must she have been cheering? must we have been cheering? must you have been cheering? must they have been cheering?
Interro-negative form
Simple form
must I not cheer? must you not cheer? must she not cheer? must we not cheer? must you not cheer? must they not cheer?
V-ing form
must I not be cheering? must you not be cheering? must she not be cheering? must we not be cheering? must you not be cheering? must they not be cheering?
Perfect
must I not have cheered? must you not have cheered? must she not have cheered? must we not have cheered? must you not have cheered? must they not have cheered?
V-ing perfect
must I not have been cheering? must you not have been cheering? must she not have been cheering? must we not have been cheering? must you not have been cheering? must they not have been cheering?