I can nicker you can nicker she can nicker we can nicker you can nicker they can nicker
V-ing form
I can be nickering you can be nickering she can be nickering we can be nickering you can be nickering they can be nickering
Perfect
I can have nickered you can have nickered she can have nickered we can have nickered you can have nickered they can have nickered
V-ing perfect
I can have been nickering you can have been nickering she can have been nickering we can have been nickering you can have been nickering they can have been nickering
Negation
Simple form
I can't nicker you can't nicker she can't nicker we can't nicker you can't nicker they can't nicker
V-ing form
I can't be nickering you can't be nickering she can't be nickering we can't be nickering you can't be nickering they can't be nickering
Perfect
I can't have nickered you can't have nickered she can't have nickered we can't have nickered you can't have nickered they can't have nickered
V-ing perfect
I can't have been nickering you can't have been nickering she can't have been nickering we can't have been nickering you can't have been nickering they can't have been nickering
Interrogative form
Simple form
can I nicker? can you nicker? can she nicker? can we nicker? can you nicker? can they nicker?
V-ing form
can I be nickering? can you be nickering? can she be nickering? can we be nickering? can you be nickering? can they be nickering?
Perfect
can I have nickered? can you have nickered? can she have nickered? can we have nickered? can you have nickered? can they have nickered?
V-ing perfect
can I have been nickering? can you have been nickering? can she have been nickering? can we have been nickering? can you have been nickering? can they have been nickering?
Interro-negative form
Simple form
can't I nicker? can't you nicker? can't she nicker? can't we nicker? can't you nicker? can't they nicker?
V-ing form
can't I be nickering? can't you be nickering? can't she be nickering? can't we be nickering? can't you be nickering? can't they be nickering?
Perfect
can't I have nickered? can't you have nickered? can't she have nickered? can't we have nickered? can't you have nickered? can't they have nickered?
V-ing perfect
can't I have been nickering? can't you have been nickering? can't she have been nickering? can't we have been nickering? can't you have been nickering? can't they have been nickering?