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