English verb conjugation
COULD FURTHER

Regular verb: further - furthered - furthered

Affirmation

Simple form	V-ing form
I could further you could further he could further we could further you could further they could further	I could be furthering you could be furthering he 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 he 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 he 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 he 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 he 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 he 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 he 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 he further? could we further? could you further? could they further?	could I be furthering? could you be furthering? could he 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 he 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 he 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 he 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 he 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 he 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 he not have been furthering? could we not have been furthering? could you not have been furthering? could they not have been furthering?