must nonplus
Regular verb: nonplus - nonplussed- nonplussed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must nonplus
you must nonplus
she must nonplus
we must nonplus
you must nonplus
they must nonplus 	I must be nonplussing
you must be nonplussing
she must be nonplussing
we must be nonplussing
you must be nonplussing
they must be nonplussing	I must have nonplussed
you must have nonplussed
she must have nonplussed
we must have nonplussed
you must have nonplussed
they must have nonplussed	I must have been nonplussing
you must have been nonplussing
she must have been nonplussing
we must have been nonplussing
you must have been nonplussing
they must have been nonplussing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't nonplus
you mustn't nonplus
she mustn't nonplus
we mustn't nonplus
you mustn't nonplus
they mustn't nonplus 	I mustn't be nonplussing
you mustn't be nonplussing
she mustn't be nonplussing
we mustn't be nonplussing
you mustn't be nonplussing
they mustn't be nonplussing	I mustn't have nonplussed
you mustn't have nonplussed
she mustn't have nonplussed
we mustn't have nonplussed
you mustn't have nonplussed
they mustn't have nonplussed	I mustn't have been nonplussing
you mustn't have been nonplussing
she mustn't have been nonplussing
we mustn't have been nonplussing
you mustn't have been nonplussing
they mustn't have been nonplussing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I nonplus?
must you nonplus?
must she nonplus?
must we nonplus?
must you nonplus?
must they nonplus? 	must I be nonplussing?
must you be nonplussing?
must she be nonplussing?
must we be nonplussing?
must you be nonplussing?
must they be nonplussing? 	must I have nonplussed?
must you have nonplussed?
must she have nonplussed?
must we have nonplussed?
must you have nonplussed?
must they have nonplussed? 	must I have been nonplussing?
must you have been nonplussing?
must she have been nonplussing?
must we have been nonplussing?
must you have been nonplussing?
must they have been nonplussing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I nonplus?
mustn't you nonplus?
mustn't she nonplus?
mustn't we nonplus?
mustn't you nonplus?
mustn't they nonplus? 	mustn't I be nonplussing?
mustn't you be nonplussing?
mustn't she be nonplussing?
mustn't we be nonplussing?
mustn't you be nonplussing?
mustn't they be nonplussing? 	mustn't I have nonplussed?
mustn't you have nonplussed?
mustn't she have nonplussed?
mustn't we have nonplussed?
mustn't you have nonplussed?
mustn't they have nonplussed? 	mustn't I have been nonplussing?
mustn't you have been nonplussing?
mustn't she have been nonplussing?
mustn't we have been nonplussing?
mustn't you have been nonplussing?
mustn't they have been nonplussing?