English verb conjugation
COULD FURTHER

Regular verb: further - furthered - furthered

Affirmation

Simple form	V-ing form
I could further you could further she could further we could further you could further they could further	I could be furthering you could be furthering she could be furthering we could be furthering you could be furthering they could be furthering
Perfect	V-ing perfect
I could have furthered you could have furthered she could have furthered we could have furthered you could have furthered they could have furthered	I could have been furthering you could have been furthering she could have been furthering we could have been furthering you could have been furthering they could have been furthering

Negation

Simple form	V-ing form
I could not further you could not further she could not further we could not further you could not further they could not further	I could not be furthering you could not be furthering she could not be furthering we could not be furthering you could not be furthering they could not be furthering
Perfect	V-ing perfect
I could not have furthered you could not have furthered she could not have furthered we could not have furthered you could not have furthered they could not have furthered	I could not have been furthering you could not have been furthering she could not have been furthering we could not have been furthering you could not have been furthering they could not have been furthering

Interrogative form

Simple form	V-ing form
could I further? could you further? could she further? could we further? could you further? could they further?	could I be furthering? could you be furthering? could she be furthering? could we be furthering? could you be furthering? could they be furthering?
Perfect	V-ing perfect
could I have furthered? could you have furthered? could she have furthered? could we have furthered? could you have furthered? could they have furthered?	could I have been furthering? could you have been furthering? could she have been furthering? could we have been furthering? could you have been furthering? could they have been furthering?

Interro-negative form

Simple form	V-ing form
could I not further? could you not further? could she not further? could we not further? could you not further? could they not further?	could I not be furthering? could you not be furthering? could she not be furthering? could we not be furthering? could you not be furthering? could they not be furthering?
Perfect	V-ing perfect
could I not have furthered? could you not have furthered? could she not have furthered? could we not have furthered? could you not have furthered? could they not have furthered?	could I not have been furthering? could you not have been furthering? could she not have been furthering? could we not have been furthering? could you not have been furthering? could they not have been furthering?