English verb conjugation
COULD DOVEN

Regular verb: doven - dovened - dovened

Affirmation

Simple form	V-ing form
I could doven you could doven he could doven we could doven you could doven they could doven	I could be dovening you could be dovening he could be dovening we could be dovening you could be dovening they could be dovening
Perfect	V-ing perfect
I could have dovened you could have dovened he could have dovened we could have dovened you could have dovened they could have dovened	I could have been dovening you could have been dovening he could have been dovening we could have been dovening you could have been dovening they could have been dovening

Negation

Simple form	V-ing form
I could not doven you could not doven he could not doven we could not doven you could not doven they could not doven	I could not be dovening you could not be dovening he could not be dovening we could not be dovening you could not be dovening they could not be dovening
Perfect	V-ing perfect
I could not have dovened you could not have dovened he could not have dovened we could not have dovened you could not have dovened they could not have dovened	I could not have been dovening you could not have been dovening he could not have been dovening we could not have been dovening you could not have been dovening they could not have been dovening

Interrogative form

Simple form	V-ing form
could I doven? could you doven? could he doven? could we doven? could you doven? could they doven?	could I be dovening? could you be dovening? could he be dovening? could we be dovening? could you be dovening? could they be dovening?
Perfect	V-ing perfect
could I have dovened? could you have dovened? could he have dovened? could we have dovened? could you have dovened? could they have dovened?	could I have been dovening? could you have been dovening? could he have been dovening? could we have been dovening? could you have been dovening? could they have been dovening?

Interro-negative form

Simple form	V-ing form
could I not doven? could you not doven? could he not doven? could we not doven? could you not doven? could they not doven?	could I not be dovening? could you not be dovening? could he not be dovening? could we not be dovening? could you not be dovening? could they not be dovening?
Perfect	V-ing perfect
could I not have dovened? could you not have dovened? could he not have dovened? could we not have dovened? could you not have dovened? could they not have dovened?	could I not have been dovening? could you not have been dovening? could he not have been dovening? could we not have been dovening? could you not have been dovening? could they not have been dovening?