I can nicker you can nicker he can nicker we can nicker you can nicker they can nicker
V-ing form
I can be nickering you can be nickering he can be nickering we can be nickering you can be nickering they can be nickering
Perfect
I can have nickered you can have nickered he 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 he can have been nickering we can have been nickering you can have been nickering they can have been nickering
Negation
Simple form
I cannot nicker you cannot nicker he cannot nicker we cannot nicker you cannot nicker they cannot nicker
V-ing form
I cannot be nickering you cannot be nickering he cannot be nickering we cannot be nickering you cannot be nickering they cannot be nickering
Perfect
I cannot have nickered you cannot have nickered he cannot have nickered we cannot have nickered you cannot have nickered they cannot have nickered
V-ing perfect
I cannot have been nickering you cannot have been nickering he cannot have been nickering we cannot have been nickering you cannot have been nickering they cannot have been nickering
Interrogative form
Simple form
can I nicker? can you nicker? can he nicker? can we nicker? can you nicker? can they nicker?
V-ing form
can I be nickering? can you be nickering? can he be nickering? can we be nickering? can you be nickering? can they be nickering?
Perfect
can I have nickered? can you have nickered? can he 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 he have been nickering? can we have been nickering? can you have been nickering? can they have been nickering?
Interro-negative form
Simple form
can I not nicker? can you not nicker? can he not nicker? can we not nicker? can you not nicker? can they not nicker?
V-ing form
can I not be nickering? can you not be nickering? can he not be nickering? can we not be nickering? can you not be nickering? can they not be nickering?
Perfect
can I not have nickered? can you not have nickered? can he not have nickered? can we not have nickered? can you not have nickered? can they not have nickered?
V-ing perfect
can I not have been nickering? can you not have been nickering? can he not have been nickering? can we not have been nickering? can you not have been nickering? can they not have been nickering?