English verb conjugation
COULD UNLIMBER

Regular verb: unlimber - unlimbered - unlimbered

Affirmation

Simple form	V-ing form
I could unlimber you could unlimber he could unlimber we could unlimber you could unlimber they could unlimber	I could be unlimbering you could be unlimbering he could be unlimbering we could be unlimbering you could be unlimbering they could be unlimbering
Perfect	V-ing perfect
I could have unlimbered you could have unlimbered he could have unlimbered we could have unlimbered you could have unlimbered they could have unlimbered	I could have been unlimbering you could have been unlimbering he could have been unlimbering we could have been unlimbering you could have been unlimbering they could have been unlimbering

Negation

Simple form	V-ing form
I couldn't unlimber you couldn't unlimber he couldn't unlimber we couldn't unlimber you couldn't unlimber they couldn't unlimber	I couldn't be unlimbering you couldn't be unlimbering he couldn't be unlimbering we couldn't be unlimbering you couldn't be unlimbering they couldn't be unlimbering
Perfect	V-ing perfect
I couldn't have unlimbered you couldn't have unlimbered he couldn't have unlimbered we couldn't have unlimbered you couldn't have unlimbered they couldn't have unlimbered	I couldn't have been unlimbering you couldn't have been unlimbering he couldn't have been unlimbering we couldn't have been unlimbering you couldn't have been unlimbering they couldn't have been unlimbering

Interrogative form

Simple form	V-ing form
could I unlimber? could you unlimber? could he unlimber? could we unlimber? could you unlimber? could they unlimber?	could I be unlimbering? could you be unlimbering? could he be unlimbering? could we be unlimbering? could you be unlimbering? could they be unlimbering?
Perfect	V-ing perfect
could I have unlimbered? could you have unlimbered? could he have unlimbered? could we have unlimbered? could you have unlimbered? could they have unlimbered?	could I have been unlimbering? could you have been unlimbering? could he have been unlimbering? could we have been unlimbering? could you have been unlimbering? could they have been unlimbering?

Interro-negative form

Simple form	V-ing form
couldn't I unlimber? couldn't you unlimber? couldn't he unlimber? couldn't we unlimber? couldn't you unlimber? couldn't they unlimber?	couldn't I be unlimbering? couldn't you be unlimbering? couldn't he be unlimbering? couldn't we be unlimbering? couldn't you be unlimbering? couldn't they be unlimbering?
Perfect	V-ing perfect
couldn't I have unlimbered? couldn't you have unlimbered? couldn't he have unlimbered? couldn't we have unlimbered? couldn't you have unlimbered? couldn't they have unlimbered?	couldn't I have been unlimbering? couldn't you have been unlimbering? couldn't he have been unlimbering? couldn't we have been unlimbering? couldn't you have been unlimbering? couldn't they have been unlimbering?