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