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