I can sneer you can sneer she can sneer we can sneer you can sneer they can sneer
V-ing form
I can be sneering you can be sneering she can be sneering we can be sneering you can be sneering they can be sneering
Perfect
I can have sneered you can have sneered she can have sneered we can have sneered you can have sneered they can have sneered
V-ing perfect
I can have been sneering you can have been sneering she can have been sneering we can have been sneering you can have been sneering they can have been sneering
Negation
Simple form
I can't sneer you can't sneer she can't sneer we can't sneer you can't sneer they can't sneer
V-ing form
I can't be sneering you can't be sneering she can't be sneering we can't be sneering you can't be sneering they can't be sneering
Perfect
I can't have sneered you can't have sneered she can't have sneered we can't have sneered you can't have sneered they can't have sneered
V-ing perfect
I can't have been sneering you can't have been sneering she can't have been sneering we can't have been sneering you can't have been sneering they can't have been sneering
Interrogative form
Simple form
can I sneer? can you sneer? can she sneer? can we sneer? can you sneer? can they sneer?
V-ing form
can I be sneering? can you be sneering? can she be sneering? can we be sneering? can you be sneering? can they be sneering?
Perfect
can I have sneered? can you have sneered? can she have sneered? can we have sneered? can you have sneered? can they have sneered?
V-ing perfect
can I have been sneering? can you have been sneering? can she have been sneering? can we have been sneering? can you have been sneering? can they have been sneering?
Interro-negative form
Simple form
can't I sneer? can't you sneer? can't she sneer? can't we sneer? can't you sneer? can't they sneer?
V-ing form
can't I be sneering? can't you be sneering? can't she be sneering? can't we be sneering? can't you be sneering? can't they be sneering?
Perfect
can't I have sneered? can't you have sneered? can't she have sneered? can't we have sneered? can't you have sneered? can't they have sneered?
V-ing perfect
can't I have been sneering? can't you have been sneering? can't she have been sneering? can't we have been sneering? can't you have been sneering? can't they have been sneering?