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