English verb conjugation
COULD WIDEN

Regular verb: widen - widened - widened

Affirmation

Simple form	V-ing form
I could widen you could widen he could widen we could widen you could widen they could widen	I could be widening you could be widening he could be widening we could be widening you could be widening they could be widening
Perfect	V-ing perfect
I could have widened you could have widened he could have widened we could have widened you could have widened they could have widened	I could have been widening you could have been widening he could have been widening we could have been widening you could have been widening they could have been widening

Negation

Simple form	V-ing form
I could not widen you could not widen he could not widen we could not widen you could not widen they could not widen	I could not be widening you could not be widening he could not be widening we could not be widening you could not be widening they could not be widening
Perfect	V-ing perfect
I could not have widened you could not have widened he could not have widened we could not have widened you could not have widened they could not have widened	I could not have been widening you could not have been widening he could not have been widening we could not have been widening you could not have been widening they could not have been widening

Interrogative form

Simple form	V-ing form
could I widen? could you widen? could he widen? could we widen? could you widen? could they widen?	could I be widening? could you be widening? could he be widening? could we be widening? could you be widening? could they be widening?
Perfect	V-ing perfect
could I have widened? could you have widened? could he have widened? could we have widened? could you have widened? could they have widened?	could I have been widening? could you have been widening? could he have been widening? could we have been widening? could you have been widening? could they have been widening?

Interro-negative form

Simple form	V-ing form
could I not widen? could you not widen? could he not widen? could we not widen? could you not widen? could they not widen?	could I not be widening? could you not be widening? could he not be widening? could we not be widening? could you not be widening? could they not be widening?
Perfect	V-ing perfect
could I not have widened? could you not have widened? could he not have widened? could we not have widened? could you not have widened? could they not have widened?	could I not have been widening? could you not have been widening? could he not have been widening? could we not have been widening? could you not have been widening? could they not have been widening?