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 can't peer you can't peer she can't peer we can't peer you can't peer they can't peer
V-ing form
I can't be peering you can't be peering she can't be peering we can't be peering you can't be peering they can't be peering
Perfect
I can't have peered you can't have peered she can't have peered we can't have peered you can't have peered they can't have peered
V-ing perfect
I can't have been peering you can't have been peering she can't have been peering we can't have been peering you can't have been peering they can't 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't I peer? can't you peer? can't she peer? can't we peer? can't you peer? can't they peer?
V-ing form
can't I be peering? can't you be peering? can't she be peering? can't we be peering? can't you be peering? can't they be peering?
Perfect
can't I have peered? can't you have peered? can't she have peered? can't we have peered? can't you have peered? can't they have peered?
V-ing perfect
can't I have been peering? can't you have been peering? can't she have been peering? can't we have been peering? can't you have been peering? can't they have been peering?