I could cheer you could cheer he could cheer we could cheer you could cheer they could cheer
V-ing form
I could be cheering you could be cheering he could be cheering we could be cheering you could be cheering they could be cheering
Perfect
I could have cheered you could have cheered he could have cheered we could have cheered you could have cheered they could have cheered
V-ing perfect
I could have been cheering you could have been cheering he could have been cheering we could have been cheering you could have been cheering they could have been cheering
Negation
Simple form
I could not cheer you could not cheer he could not cheer we could not cheer you could not cheer they could not cheer
V-ing form
I could not be cheering you could not be cheering he could not be cheering we could not be cheering you could not be cheering they could not be cheering
Perfect
I could not have cheered you could not have cheered he could not have cheered we could not have cheered you could not have cheered they could not have cheered
V-ing perfect
I could not have been cheering you could not have been cheering he could not have been cheering we could not have been cheering you could not have been cheering they could not have been cheering
Interrogative form
Simple form
could I cheer? could you cheer? could he cheer? could we cheer? could you cheer? could they cheer?
V-ing form
could I be cheering? could you be cheering? could he be cheering? could we be cheering? could you be cheering? could they be cheering?
Perfect
could I have cheered? could you have cheered? could he have cheered? could we have cheered? could you have cheered? could they have cheered?
V-ing perfect
could I have been cheering? could you have been cheering? could he have been cheering? could we have been cheering? could you have been cheering? could they have been cheering?
Interro-negative form
Simple form
could I not cheer? could you not cheer? could he not cheer? could we not cheer? could you not cheer? could they not cheer?
V-ing form
could I not be cheering? could you not be cheering? could he not be cheering? could we not be cheering? could you not be cheering? could they not be cheering?
Perfect
could I not have cheered? could you not have cheered? could he not have cheered? could we not have cheered? could you not have cheered? could they not have cheered?
V-ing perfect
could I not have been cheering? could you not have been cheering? could he not have been cheering? could we not have been cheering? could you not have been cheering? could they not have been cheering?