English verb conjugation
COULD BACKGROUND

Regular verb: background - backgrounded - backgrounded

Affirmation

Simple form	V-ing form
I could background you could background she could background we could background you could background they could background	I could be backgrounding you could be backgrounding she could be backgrounding we could be backgrounding you could be backgrounding they could be backgrounding
Perfect	V-ing perfect
I could have backgrounded you could have backgrounded she could have backgrounded we could have backgrounded you could have backgrounded they could have backgrounded	I could have been backgrounding you could have been backgrounding she could have been backgrounding we could have been backgrounding you could have been backgrounding they could have been backgrounding

Negation

Simple form	V-ing form
I could not background you could not background she could not background we could not background you could not background they could not background	I could not be backgrounding you could not be backgrounding she could not be backgrounding we could not be backgrounding you could not be backgrounding they could not be backgrounding
Perfect	V-ing perfect
I could not have backgrounded you could not have backgrounded she could not have backgrounded we could not have backgrounded you could not have backgrounded they could not have backgrounded	I could not have been backgrounding you could not have been backgrounding she could not have been backgrounding we could not have been backgrounding you could not have been backgrounding they could not have been backgrounding

Interrogative form

Simple form	V-ing form
could I background? could you background? could she background? could we background? could you background? could they background?	could I be backgrounding? could you be backgrounding? could she be backgrounding? could we be backgrounding? could you be backgrounding? could they be backgrounding?
Perfect	V-ing perfect
could I have backgrounded? could you have backgrounded? could she have backgrounded? could we have backgrounded? could you have backgrounded? could they have backgrounded?	could I have been backgrounding? could you have been backgrounding? could she have been backgrounding? could we have been backgrounding? could you have been backgrounding? could they have been backgrounding?

Interro-negative form

Simple form	V-ing form
could I not background? could you not background? could she not background? could we not background? could you not background? could they not background?	could I not be backgrounding? could you not be backgrounding? could she not be backgrounding? could we not be backgrounding? could you not be backgrounding? could they not be backgrounding?
Perfect	V-ing perfect
could I not have backgrounded? could you not have backgrounded? could she not have backgrounded? could we not have backgrounded? could you not have backgrounded? could they not have backgrounded?	could I not have been backgrounding? could you not have been backgrounding? could she not have been backgrounding? could we not have been backgrounding? could you not have been backgrounding? could they not have been backgrounding?