I can peer you can peer he can peer we can peer you can peer they can peer
V-ing form
I can be peering you can be peering he can be peering we can be peering you can be peering they can be peering
Perfect
I can have peered you can have peered he 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 he 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 he cannot peer we cannot peer you cannot peer they cannot peer
V-ing form
I cannot be peering you cannot be peering he cannot be peering we cannot be peering you cannot be peering they cannot be peering
Perfect
I cannot have peered you cannot have peered he 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 he 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 he peer? can we peer? can you peer? can they peer?
V-ing form
can I be peering? can you be peering? can he be peering? can we be peering? can you be peering? can they be peering?
Perfect
can I have peered? can you have peered? can he 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 he 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 he 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 he 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 he 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 he not have been peering? can we not have been peering? can you not have been peering? can they not have been peering?