I could hover you could hover he could hover we could hover you could hover they could hover
V-ing form
I could be hovering you could be hovering he could be hovering we could be hovering you could be hovering they could be hovering
Perfect
I could have hovered you could have hovered he could have hovered we could have hovered you could have hovered they could have hovered
V-ing perfect
I could have been hovering you could have been hovering he could have been hovering we could have been hovering you could have been hovering they could have been hovering
Negation
Simple form
I could not hover you could not hover he could not hover we could not hover you could not hover they could not hover
V-ing form
I could not be hovering you could not be hovering he could not be hovering we could not be hovering you could not be hovering they could not be hovering
Perfect
I could not have hovered you could not have hovered he could not have hovered we could not have hovered you could not have hovered they could not have hovered
V-ing perfect
I could not have been hovering you could not have been hovering he could not have been hovering we could not have been hovering you could not have been hovering they could not have been hovering
Interrogative form
Simple form
could I hover? could you hover? could he hover? could we hover? could you hover? could they hover?
V-ing form
could I be hovering? could you be hovering? could he be hovering? could we be hovering? could you be hovering? could they be hovering?
Perfect
could I have hovered? could you have hovered? could he have hovered? could we have hovered? could you have hovered? could they have hovered?
V-ing perfect
could I have been hovering? could you have been hovering? could he have been hovering? could we have been hovering? could you have been hovering? could they have been hovering?
Interro-negative form
Simple form
could I not hover? could you not hover? could he not hover? could we not hover? could you not hover? could they not hover?
V-ing form
could I not be hovering? could you not be hovering? could he not be hovering? could we not be hovering? could you not be hovering? could they not be hovering?
Perfect
could I not have hovered? could you not have hovered? could he not have hovered? could we not have hovered? could you not have hovered? could they not have hovered?
V-ing perfect
could I not have been hovering? could you not have been hovering? could he not have been hovering? could we not have been hovering? could you not have been hovering? could they not have been hovering?