English verb conjugation
COULD LIMBER

Regular verb: limber - limbered - limbered

Affirmation

Simple form	V-ing form
I could limber you could limber he could limber we could limber you could limber they could limber	I could be limbering you could be limbering he could be limbering we could be limbering you could be limbering they could be limbering
Perfect	V-ing perfect
I could have limbered you could have limbered he could have limbered we could have limbered you could have limbered they could have limbered	I could have been limbering you could have been limbering he could have been limbering we could have been limbering you could have been limbering they could have been limbering

Negation

Simple form	V-ing form
I could not limber you could not limber he could not limber we could not limber you could not limber they could not limber	I could not be limbering you could not be limbering he could not be limbering we could not be limbering you could not be limbering they could not be limbering
Perfect	V-ing perfect
I could not have limbered you could not have limbered he could not have limbered we could not have limbered you could not have limbered they could not have limbered	I could not have been limbering you could not have been limbering he could not have been limbering we could not have been limbering you could not have been limbering they could not have been limbering

Interrogative form

Simple form	V-ing form
could I limber? could you limber? could he limber? could we limber? could you limber? could they limber?	could I be limbering? could you be limbering? could he be limbering? could we be limbering? could you be limbering? could they be limbering?
Perfect	V-ing perfect
could I have limbered? could you have limbered? could he have limbered? could we have limbered? could you have limbered? could they have limbered?	could I have been limbering? could you have been limbering? could he have been limbering? could we have been limbering? could you have been limbering? could they have been limbering?

Interro-negative form

Simple form	V-ing form
could I not limber? could you not limber? could he not limber? could we not limber? could you not limber? could they not limber?	could I not be limbering? could you not be limbering? could he not be limbering? could we not be limbering? could you not be limbering? could they not be limbering?
Perfect	V-ing perfect
could I not have limbered? could you not have limbered? could he not have limbered? could we not have limbered? could you not have limbered? could they not have limbered?	could I not have been limbering? could you not have been limbering? could he not have been limbering? could we not have been limbering? could you not have been limbering? could they not have been limbering?