English verb conjugation
COULD ILLUMINATE

Regular verb: illuminate - illuminated - illuminated

Affirmation

Simple form	V-ing form
I could illuminate you could illuminate he could illuminate we could illuminate you could illuminate they could illuminate	I could be illuminating you could be illuminating he could be illuminating we could be illuminating you could be illuminating they could be illuminating
Perfect	V-ing perfect
I could have illuminated you could have illuminated he could have illuminated we could have illuminated you could have illuminated they could have illuminated	I could have been illuminating you could have been illuminating he could have been illuminating we could have been illuminating you could have been illuminating they could have been illuminating

Negation

Simple form	V-ing form
I couldn't illuminate you couldn't illuminate he couldn't illuminate we couldn't illuminate you couldn't illuminate they couldn't illuminate	I couldn't be illuminating you couldn't be illuminating he couldn't be illuminating we couldn't be illuminating you couldn't be illuminating they couldn't be illuminating
Perfect	V-ing perfect
I couldn't have illuminated you couldn't have illuminated he couldn't have illuminated we couldn't have illuminated you couldn't have illuminated they couldn't have illuminated	I couldn't have been illuminating you couldn't have been illuminating he couldn't have been illuminating we couldn't have been illuminating you couldn't have been illuminating they couldn't have been illuminating

Interrogative form

Simple form	V-ing form
could I illuminate? could you illuminate? could he illuminate? could we illuminate? could you illuminate? could they illuminate?	could I be illuminating? could you be illuminating? could he be illuminating? could we be illuminating? could you be illuminating? could they be illuminating?
Perfect	V-ing perfect
could I have illuminated? could you have illuminated? could he have illuminated? could we have illuminated? could you have illuminated? could they have illuminated?	could I have been illuminating? could you have been illuminating? could he have been illuminating? could we have been illuminating? could you have been illuminating? could they have been illuminating?

Interro-negative form

Simple form	V-ing form
couldn't I illuminate? couldn't you illuminate? couldn't he illuminate? couldn't we illuminate? couldn't you illuminate? couldn't they illuminate?	couldn't I be illuminating? couldn't you be illuminating? couldn't he be illuminating? couldn't we be illuminating? couldn't you be illuminating? couldn't they be illuminating?
Perfect	V-ing perfect
couldn't I have illuminated? couldn't you have illuminated? couldn't he have illuminated? couldn't we have illuminated? couldn't you have illuminated? couldn't they have illuminated?	couldn't I have been illuminating? couldn't you have been illuminating? couldn't he have been illuminating? couldn't we have been illuminating? couldn't you have been illuminating? couldn't they have been illuminating?