I could widen you could widen he could widen we could widen you could widen they could widen
Forme en V-ing
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
I could have widened you could have widened he could have widened we could have widened you could have widened they could have widened
Perfect en V-ing
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
Négation
Forme simple
I could not widen you could not widen he could not widen we could not widen you could not widen they could not widen
Forme en V-ing
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
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
Perfect en V-ing
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
Forme interrogative
Forme simple
could I widen? could you widen? could he widen? could we widen? could you widen? could they widen?
Forme en V-ing
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
could I have widened? could you have widened? could he have widened? could we have widened? could you have widened? could they have widened?
Perfect en V-ing
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?
Forme interro-négative
Forme simple
could I not widen? could you not widen? could he not widen? could we not widen? could you not widen? could they not widen?
Forme en V-ing
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
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?
Perfect en V-ing
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?