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