English verb conjugation
MUST NONPLUS

Regular verb: nonplus - nonplussed - nonplussed

Affirmation

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