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 mustn't superscribe you mustn't superscribe he mustn't superscribe we mustn't superscribe you mustn't superscribe they mustn't superscribe	I mustn't be superscribing you mustn't be superscribing he mustn't be superscribing we mustn't be superscribing you mustn't be superscribing they mustn't be superscribing
Perfect	V-ing perfect
I mustn't have superscribed you mustn't have superscribed he mustn't have superscribed we mustn't have superscribed you mustn't have superscribed they mustn't have superscribed	I mustn't have been superscribing you mustn't have been superscribing he mustn't have been superscribing we mustn't have been superscribing you mustn't have been superscribing they mustn't 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
mustn't I superscribe? mustn't you superscribe? mustn't he superscribe? mustn't we superscribe? mustn't you superscribe? mustn't they superscribe?	mustn't I be superscribing? mustn't you be superscribing? mustn't he be superscribing? mustn't we be superscribing? mustn't you be superscribing? mustn't they be superscribing?
Perfect	V-ing perfect
mustn't I have superscribed? mustn't you have superscribed? mustn't he have superscribed? mustn't we have superscribed? mustn't you have superscribed? mustn't they have superscribed?	mustn't I have been superscribing? mustn't you have been superscribing? mustn't he have been superscribing? mustn't we have been superscribing? mustn't you have been superscribing? mustn't they have been superscribing?