English verb conjugation
COULD DEN

Regular verb: den - dened - dened

Affirmation

Simple form	V-ing form
I could den you could den he could den we could den you could den they could den	I could be dening you could be dening he could be dening we could be dening you could be dening they could be dening
Perfect	V-ing perfect
I could have dened you could have dened he could have dened we could have dened you could have dened they could have dened	I could have been dening you could have been dening he could have been dening we could have been dening you could have been dening they could have been dening

Negation

Simple form	V-ing form
I could not den you could not den he could not den we could not den you could not den they could not den	I could not be dening you could not be dening he could not be dening we could not be dening you could not be dening they could not be dening
Perfect	V-ing perfect
I could not have dened you could not have dened he could not have dened we could not have dened you could not have dened they could not have dened	I could not have been dening you could not have been dening he could not have been dening we could not have been dening you could not have been dening they could not have been dening

Interrogative form

Simple form	V-ing form
could I den? could you den? could he den? could we den? could you den? could they den?	could I be dening? could you be dening? could he be dening? could we be dening? could you be dening? could they be dening?
Perfect	V-ing perfect
could I have dened? could you have dened? could he have dened? could we have dened? could you have dened? could they have dened?	could I have been dening? could you have been dening? could he have been dening? could we have been dening? could you have been dening? could they have been dening?

Interro-negative form

Simple form	V-ing form
could I not den? could you not den? could he not den? could we not den? could you not den? could they not den?	could I not be dening? could you not be dening? could he not be dening? could we not be dening? could you not be dening? could they not be dening?
Perfect	V-ing perfect
could I not have dened? could you not have dened? could he not have dened? could we not have dened? could you not have dened? could they not have dened?	could I not have been dening? could you not have been dening? could he not have been dening? could we not have been dening? could you not have been dening? could they not have been dening?