I could pucker you could pucker she could pucker we could pucker you could pucker they could pucker
V-ing form
I could be puckering you could be puckering she could be puckering we could be puckering you could be puckering they could be puckering
Perfect
I could have puckered you could have puckered she could have puckered we could have puckered you could have puckered they could have puckered
V-ing perfect
I could have been puckering you could have been puckering she could have been puckering we could have been puckering you could have been puckering they could have been puckering
Negation
Simple form
I could not pucker you could not pucker she could not pucker we could not pucker you could not pucker they could not pucker
V-ing form
I could not be puckering you could not be puckering she could not be puckering we could not be puckering you could not be puckering they could not be puckering
Perfect
I could not have puckered you could not have puckered she could not have puckered we could not have puckered you could not have puckered they could not have puckered
V-ing perfect
I could not have been puckering you could not have been puckering she could not have been puckering we could not have been puckering you could not have been puckering they could not have been puckering
Interrogative form
Simple form
could I pucker? could you pucker? could she pucker? could we pucker? could you pucker? could they pucker?
V-ing form
could I be puckering? could you be puckering? could she be puckering? could we be puckering? could you be puckering? could they be puckering?
Perfect
could I have puckered? could you have puckered? could she have puckered? could we have puckered? could you have puckered? could they have puckered?
V-ing perfect
could I have been puckering? could you have been puckering? could she have been puckering? could we have been puckering? could you have been puckering? could they have been puckering?
Interro-negative form
Simple form
could I not pucker? could you not pucker? could she not pucker? could we not pucker? could you not pucker? could they not pucker?
V-ing form
could I not be puckering? could you not be puckering? could she not be puckering? could we not be puckering? could you not be puckering? could they not be puckering?
Perfect
could I not have puckered? could you not have puckered? could she not have puckered? could we not have puckered? could you not have puckered? could they not have puckered?
V-ing perfect
could I not have been puckering? could you not have been puckering? could she not have been puckering? could we not have been puckering? could you not have been puckering? could they not have been puckering?