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 couldn't further you couldn't further he couldn't further we couldn't further you couldn't further they couldn't further	I couldn't be furthering you couldn't be furthering he couldn't be furthering we couldn't be furthering you couldn't be furthering they couldn't be furthering
Perfect	V-ing perfect
I couldn't have furthered you couldn't have furthered he couldn't have furthered we couldn't have furthered you couldn't have furthered they couldn't have furthered	I couldn't have been furthering you couldn't have been furthering he couldn't have been furthering we couldn't have been furthering you couldn't have been furthering they couldn't 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
couldn't I further? couldn't you further? couldn't he further? couldn't we further? couldn't you further? couldn't they further?	couldn't I be furthering? couldn't you be furthering? couldn't he be furthering? couldn't we be furthering? couldn't you be furthering? couldn't they be furthering?
Perfect	V-ing perfect
couldn't I have furthered? couldn't you have furthered? couldn't he have furthered? couldn't we have furthered? couldn't you have furthered? couldn't they have furthered?	couldn't I have been furthering? couldn't you have been furthering? couldn't he have been furthering? couldn't we have been furthering? couldn't you have been furthering? couldn't they have been furthering?