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