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