I must hover you must hover he must hover we must hover you must hover they must hover
V-ing form
I must be hovering you must be hovering he must be hovering we must be hovering you must be hovering they must be hovering
Perfect
I must have hovered you must have hovered he must have hovered we must have hovered you must have hovered they must have hovered
V-ing perfect
I must have been hovering you must have been hovering he must have been hovering we must have been hovering you must have been hovering they must have been hovering
Negation
Simple form
I mustn't hover you mustn't hover he mustn't hover we mustn't hover you mustn't hover they mustn't hover
V-ing form
I mustn't be hovering you mustn't be hovering he mustn't be hovering we mustn't be hovering you mustn't be hovering they mustn't be hovering
Perfect
I mustn't have hovered you mustn't have hovered he mustn't have hovered we mustn't have hovered you mustn't have hovered they mustn't have hovered
V-ing perfect
I mustn't have been hovering you mustn't have been hovering he mustn't have been hovering we mustn't have been hovering you mustn't have been hovering they mustn't have been hovering
Interrogative form
Simple form
must I hover? must you hover? must he hover? must we hover? must you hover? must they hover?
V-ing form
must I be hovering? must you be hovering? must he be hovering? must we be hovering? must you be hovering? must they be hovering?
Perfect
must I have hovered? must you have hovered? must he have hovered? must we have hovered? must you have hovered? must they have hovered?
V-ing perfect
must I have been hovering? must you have been hovering? must he have been hovering? must we have been hovering? must you have been hovering? must they have been hovering?
Interro-negative form
Simple form
mustn't I hover? mustn't you hover? mustn't he hover? mustn't we hover? mustn't you hover? mustn't they hover?
V-ing form
mustn't I be hovering? mustn't you be hovering? mustn't he be hovering? mustn't we be hovering? mustn't you be hovering? mustn't they be hovering?
Perfect
mustn't I have hovered? mustn't you have hovered? mustn't he have hovered? mustn't we have hovered? mustn't you have hovered? mustn't they have hovered?
V-ing perfect
mustn't I have been hovering? mustn't you have been hovering? mustn't he have been hovering? mustn't we have been hovering? mustn't you have been hovering? mustn't they have been hovering?