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