I must bore you must bore he must bore we must bore you must bore they must bore
V-ing form
I must be boring you must be boring he must be boring we must be boring you must be boring they must be boring
Perfect
I must have bored you must have bored he must have bored we must have bored you must have bored they must have bored
V-ing perfect
I must have been boring you must have been boring he must have been boring we must have been boring you must have been boring they must have been boring
Negation
Simple form
I must not bore you must not bore he must not bore we must not bore you must not bore they must not bore
V-ing form
I must not be boring you must not be boring he must not be boring we must not be boring you must not be boring they must not be boring
Perfect
I must not have bored you must not have bored he must not have bored we must not have bored you must not have bored they must not have bored
V-ing perfect
I must not have been boring you must not have been boring he must not have been boring we must not have been boring you must not have been boring they must not have been boring
Interrogative form
Simple form
must I bore? must you bore? must he bore? must we bore? must you bore? must they bore?
V-ing form
must I be boring? must you be boring? must he be boring? must we be boring? must you be boring? must they be boring?
Perfect
must I have bored? must you have bored? must he have bored? must we have bored? must you have bored? must they have bored?
V-ing perfect
must I have been boring? must you have been boring? must he have been boring? must we have been boring? must you have been boring? must they have been boring?
Interro-negative form
Simple form
must I not bore? must you not bore? must he not bore? must we not bore? must you not bore? must they not bore?
V-ing form
must I not be boring? must you not be boring? must he not be boring? must we not be boring? must you not be boring? must they not be boring?
Perfect
must I not have bored? must you not have bored? must he not have bored? must we not have bored? must you not have bored? must they not have bored?
V-ing perfect
must I not have been boring? must you not have been boring? must he not have been boring? must we not have been boring? must you not have been boring? must they not have been boring?