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 couldn't doven you couldn't doven he couldn't doven we couldn't doven you couldn't doven they couldn't doven	I couldn't be dovening you couldn't be dovening he couldn't be dovening we couldn't be dovening you couldn't be dovening they couldn't be dovening
Perfect	V-ing perfect
I couldn't have dovened you couldn't have dovened he couldn't have dovened we couldn't have dovened you couldn't have dovened they couldn't have dovened	I couldn't have been dovening you couldn't have been dovening he couldn't have been dovening we couldn't have been dovening you couldn't have been dovening they couldn't 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
couldn't I doven? couldn't you doven? couldn't he doven? couldn't we doven? couldn't you doven? couldn't they doven?	couldn't I be dovening? couldn't you be dovening? couldn't he be dovening? couldn't we be dovening? couldn't you be dovening? couldn't they be dovening?
Perfect	V-ing perfect
couldn't I have dovened? couldn't you have dovened? couldn't he have dovened? couldn't we have dovened? couldn't you have dovened? couldn't they have dovened?	couldn't I have been dovening? couldn't you have been dovening? couldn't he have been dovening? couldn't we have been dovening? couldn't you have been dovening? couldn't they have been dovening?