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