English verb conjugation
COULD ILLUMINE

Regular verb: illumine - illumined - illumined

Affirmation

Simple form	V-ing form
I could illumine you could illumine he could illumine we could illumine you could illumine they could illumine	I could be illumining you could be illumining he could be illumining we could be illumining you could be illumining they could be illumining
Perfect	V-ing perfect
I could have illumined you could have illumined he could have illumined we could have illumined you could have illumined they could have illumined	I could have been illumining you could have been illumining he could have been illumining we could have been illumining you could have been illumining they could have been illumining

Negation

Simple form	V-ing form
I couldn't illumine you couldn't illumine he couldn't illumine we couldn't illumine you couldn't illumine they couldn't illumine	I couldn't be illumining you couldn't be illumining he couldn't be illumining we couldn't be illumining you couldn't be illumining they couldn't be illumining
Perfect	V-ing perfect
I couldn't have illumined you couldn't have illumined he couldn't have illumined we couldn't have illumined you couldn't have illumined they couldn't have illumined	I couldn't have been illumining you couldn't have been illumining he couldn't have been illumining we couldn't have been illumining you couldn't have been illumining they couldn't have been illumining

Interrogative form

Simple form	V-ing form
could I illumine? could you illumine? could he illumine? could we illumine? could you illumine? could they illumine?	could I be illumining? could you be illumining? could he be illumining? could we be illumining? could you be illumining? could they be illumining?
Perfect	V-ing perfect
could I have illumined? could you have illumined? could he have illumined? could we have illumined? could you have illumined? could they have illumined?	could I have been illumining? could you have been illumining? could he have been illumining? could we have been illumining? could you have been illumining? could they have been illumining?

Interro-negative form

Simple form	V-ing form
couldn't I illumine? couldn't you illumine? couldn't he illumine? couldn't we illumine? couldn't you illumine? couldn't they illumine?	couldn't I be illumining? couldn't you be illumining? couldn't he be illumining? couldn't we be illumining? couldn't you be illumining? couldn't they be illumining?
Perfect	V-ing perfect
couldn't I have illumined? couldn't you have illumined? couldn't he have illumined? couldn't we have illumined? couldn't you have illumined? couldn't they have illumined?	couldn't I have been illumining? couldn't you have been illumining? couldn't he have been illumining? couldn't we have been illumining? couldn't you have been illumining? couldn't they have been illumining?