I could peer you could peer he could peer we could peer you could peer they could peer
V-ing form
I could be peering you could be peering he could be peering we could be peering you could be peering they could be peering
Perfect
I could have peered you could have peered he could have peered we could have peered you could have peered they could have peered
V-ing perfect
I could have been peering you could have been peering he could have been peering we could have been peering you could have been peering they could have been peering
Negation
Simple form
I could not peer you could not peer he could not peer we could not peer you could not peer they could not peer
V-ing form
I could not be peering you could not be peering he could not be peering we could not be peering you could not be peering they could not be peering
Perfect
I could not have peered you could not have peered he could not have peered we could not have peered you could not have peered they could not have peered
V-ing perfect
I could not have been peering you could not have been peering he could not have been peering we could not have been peering you could not have been peering they could not have been peering
Interrogative form
Simple form
could I peer? could you peer? could he peer? could we peer? could you peer? could they peer?
V-ing form
could I be peering? could you be peering? could he be peering? could we be peering? could you be peering? could they be peering?
Perfect
could I have peered? could you have peered? could he have peered? could we have peered? could you have peered? could they have peered?
V-ing perfect
could I have been peering? could you have been peering? could he have been peering? could we have been peering? could you have been peering? could they have been peering?
Interro-negative form
Simple form
could I not peer? could you not peer? could he not peer? could we not peer? could you not peer? could they not peer?
V-ing form
could I not be peering? could you not be peering? could he not be peering? could we not be peering? could you not be peering? could they not be peering?
Perfect
could I not have peered? could you not have peered? could he not have peered? could we not have peered? could you not have peered? could they not have peered?
V-ing perfect
could I not have been peering? could you not have been peering? could he not have been peering? could we not have been peering? could you not have been peering? could they not have been peering?