I must regulate you must regulate she must regulate we must regulate you must regulate they must regulate
V-ing form
I must be regulating you must be regulating she must be regulating we must be regulating you must be regulating they must be regulating
Perfect
I must have regulated you must have regulated she 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 she 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 she 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 she 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 she 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 she 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 she regulate? must we regulate? must you regulate? must they regulate?
V-ing form
must I be regulating? must you be regulating? must she be regulating? must we be regulating? must you be regulating? must they be regulating?
Perfect
must I have regulated? must you have regulated? must she 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 she 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 she 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 she 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 she 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 she have been regulating? mustn't we have been regulating? mustn't you have been regulating? mustn't they have been regulating?