I could rotate you could rotate she could rotate we could rotate you could rotate they could rotate
V-ing form
I could be rotating you could be rotating she could be rotating we could be rotating you could be rotating they could be rotating
Perfect
I could have rotated you could have rotated she could have rotated we could have rotated you could have rotated they could have rotated
V-ing perfect
I could have been rotating you could have been rotating she could have been rotating we could have been rotating you could have been rotating they could have been rotating
Negation
Simple form
I could not rotate you could not rotate she could not rotate we could not rotate you could not rotate they could not rotate
V-ing form
I could not be rotating you could not be rotating she could not be rotating we could not be rotating you could not be rotating they could not be rotating
Perfect
I could not have rotated you could not have rotated she could not have rotated we could not have rotated you could not have rotated they could not have rotated
V-ing perfect
I could not have been rotating you could not have been rotating she could not have been rotating we could not have been rotating you could not have been rotating they could not have been rotating
Interrogative form
Simple form
could I rotate? could you rotate? could she rotate? could we rotate? could you rotate? could they rotate?
V-ing form
could I be rotating? could you be rotating? could she be rotating? could we be rotating? could you be rotating? could they be rotating?
Perfect
could I have rotated? could you have rotated? could she have rotated? could we have rotated? could you have rotated? could they have rotated?
V-ing perfect
could I have been rotating? could you have been rotating? could she have been rotating? could we have been rotating? could you have been rotating? could they have been rotating?
Interro-negative form
Simple form
could I not rotate? could you not rotate? could she not rotate? could we not rotate? could you not rotate? could they not rotate?
V-ing form
could I not be rotating? could you not be rotating? could she not be rotating? could we not be rotating? could you not be rotating? could they not be rotating?
Perfect
could I not have rotated? could you not have rotated? could she not have rotated? could we not have rotated? could you not have rotated? could they not have rotated?
V-ing perfect
could I not have been rotating? could you not have been rotating? could she not have been rotating? could we not have been rotating? could you not have been rotating? could they not have been rotating?