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