must superscribe
Regular verb: superscribe - superscribed- superscribed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?