English verb conjugation
MUST SUPERSCRIBE

Regular verb: superscribe - superscribed - superscribed

Affirmation

Simple form	V-ing form
I must superscribe you must superscribe he must superscribe we must superscribe you must superscribe they must superscribe	I must be superscribing you must be superscribing he must be superscribing we must be superscribing you must be superscribing they must be superscribing
Perfect	V-ing perfect
I must have superscribed you must have superscribed he must have superscribed we must have superscribed you must have superscribed they must have superscribed	I must have been superscribing you must have been superscribing he must have been superscribing we must have been superscribing you must have been superscribing they must have been superscribing

Negation

Simple form	V-ing form
I must not superscribe you must not superscribe he must not superscribe we must not superscribe you must not superscribe they must not superscribe	I must not be superscribing you must not be superscribing he must not be superscribing we must not be superscribing you must not be superscribing they must not be superscribing
Perfect	V-ing perfect
I must not have superscribed you must not have superscribed he must not have superscribed we must not have superscribed you must not have superscribed they must not have superscribed	I must not have been superscribing you must not have been superscribing he must not have been superscribing we must not have been superscribing you must not have been superscribing they must not have been superscribing

Interrogative form

Simple form	V-ing form
must I superscribe? must you superscribe? must he superscribe? must we superscribe? must you superscribe? must they superscribe?	must I be superscribing? must you be superscribing? must he be superscribing? must we be superscribing? must you be superscribing? must they be superscribing?
Perfect	V-ing perfect
must I have superscribed? must you have superscribed? must he have superscribed? must we have superscribed? must you have superscribed? must they have superscribed?	must I have been superscribing? must you have been superscribing? must he have been superscribing? must we have been superscribing? must you have been superscribing? must they have been superscribing?

Interro-negative form

Simple form	V-ing form
must I not superscribe? must you not superscribe? must he not superscribe? must we not superscribe? must you not superscribe? must they not superscribe?	must I not be superscribing? must you not be superscribing? must he not be superscribing? must we not be superscribing? must you not be superscribing? must they not be superscribing?
Perfect	V-ing perfect
must I not have superscribed? must you not have superscribed? must he not have superscribed? must we not have superscribed? must you not have superscribed? must they not have superscribed?	must I not have been superscribing? must you not have been superscribing? must he not have been superscribing? must we not have been superscribing? must you not have been superscribing? must they not have been superscribing?