English verb conjugation
COULD NONPLUS

Regular verb: nonplus - nonplussed - nonplussed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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