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