I could skeletonize you could skeletonize she could skeletonize we could skeletonize you could skeletonize they could skeletonize
V-ing form
I could be skeletonizing you could be skeletonizing she could be skeletonizing we could be skeletonizing you could be skeletonizing they could be skeletonizing
Perfect
I could have skeletonized you could have skeletonized she could have skeletonized we could have skeletonized you could have skeletonized they could have skeletonized
V-ing perfect
I could have been skeletonizing you could have been skeletonizing she could have been skeletonizing we could have been skeletonizing you could have been skeletonizing they could have been skeletonizing
Negation
Simple form
I could not skeletonize you could not skeletonize she could not skeletonize we could not skeletonize you could not skeletonize they could not skeletonize
V-ing form
I could not be skeletonizing you could not be skeletonizing she could not be skeletonizing we could not be skeletonizing you could not be skeletonizing they could not be skeletonizing
Perfect
I could not have skeletonized you could not have skeletonized she could not have skeletonized we could not have skeletonized you could not have skeletonized they could not have skeletonized
V-ing perfect
I could not have been skeletonizing you could not have been skeletonizing she could not have been skeletonizing we could not have been skeletonizing you could not have been skeletonizing they could not have been skeletonizing
Interrogative form
Simple form
could I skeletonize? could you skeletonize? could she skeletonize? could we skeletonize? could you skeletonize? could they skeletonize?
V-ing form
could I be skeletonizing? could you be skeletonizing? could she be skeletonizing? could we be skeletonizing? could you be skeletonizing? could they be skeletonizing?
Perfect
could I have skeletonized? could you have skeletonized? could she have skeletonized? could we have skeletonized? could you have skeletonized? could they have skeletonized?
V-ing perfect
could I have been skeletonizing? could you have been skeletonizing? could she have been skeletonizing? could we have been skeletonizing? could you have been skeletonizing? could they have been skeletonizing?
Interro-negative form
Simple form
could I not skeletonize? could you not skeletonize? could she not skeletonize? could we not skeletonize? could you not skeletonize? could they not skeletonize?
V-ing form
could I not be skeletonizing? could you not be skeletonizing? could she not be skeletonizing? could we not be skeletonizing? could you not be skeletonizing? could they not be skeletonizing?
Perfect
could I not have skeletonized? could you not have skeletonized? could she not have skeletonized? could we not have skeletonized? could you not have skeletonized? could they not have skeletonized?
V-ing perfect
could I not have been skeletonizing? could you not have been skeletonizing? could she not have been skeletonizing? could we not have been skeletonizing? could you not have been skeletonizing? could they not have been skeletonizing?