must proscribe
Regular verb: proscribe - proscribed- proscribed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must proscribe
you must proscribe
he must proscribe
we must proscribe
you must proscribe
they must proscribe 	I must be proscribing
you must be proscribing
he must be proscribing
we must be proscribing
you must be proscribing
they must be proscribing	I must have proscribed
you must have proscribed
he must have proscribed
we must have proscribed
you must have proscribed
they must have proscribed	I must have been proscribing
you must have been proscribing
he must have been proscribing
we must have been proscribing
you must have been proscribing
they must have been proscribing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't proscribe
you mustn't proscribe
he mustn't proscribe
we mustn't proscribe
you mustn't proscribe
they mustn't proscribe 	I mustn't be proscribing
you mustn't be proscribing
he mustn't be proscribing
we mustn't be proscribing
you mustn't be proscribing
they mustn't be proscribing	I mustn't have proscribed
you mustn't have proscribed
he mustn't have proscribed
we mustn't have proscribed
you mustn't have proscribed
they mustn't have proscribed	I mustn't have been proscribing
you mustn't have been proscribing
he mustn't have been proscribing
we mustn't have been proscribing
you mustn't have been proscribing
they mustn't have been proscribing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I proscribe?
must you proscribe?
must he proscribe?
must we proscribe?
must you proscribe?
must they proscribe? 	must I be proscribing?
must you be proscribing?
must he be proscribing?
must we be proscribing?
must you be proscribing?
must they be proscribing? 	must I have proscribed?
must you have proscribed?
must he have proscribed?
must we have proscribed?
must you have proscribed?
must they have proscribed? 	must I have been proscribing?
must you have been proscribing?
must he have been proscribing?
must we have been proscribing?
must you have been proscribing?
must they have been proscribing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I proscribe?
mustn't you proscribe?
mustn't he proscribe?
mustn't we proscribe?
mustn't you proscribe?
mustn't they proscribe? 	mustn't I be proscribing?
mustn't you be proscribing?
mustn't he be proscribing?
mustn't we be proscribing?
mustn't you be proscribing?
mustn't they be proscribing? 	mustn't I have proscribed?
mustn't you have proscribed?
mustn't he have proscribed?
mustn't we have proscribed?
mustn't you have proscribed?
mustn't they have proscribed? 	mustn't I have been proscribing?
mustn't you have been proscribing?
mustn't he have been proscribing?
mustn't we have been proscribing?
mustn't you have been proscribing?
mustn't they have been proscribing?