I can snigger you can snigger she can snigger we can snigger you can snigger they can snigger
V-ing form
I can be sniggering you can be sniggering she can be sniggering we can be sniggering you can be sniggering they can be sniggering
Perfect
I can have sniggered you can have sniggered she can have sniggered we can have sniggered you can have sniggered they can have sniggered
V-ing perfect
I can have been sniggering you can have been sniggering she can have been sniggering we can have been sniggering you can have been sniggering they can have been sniggering
Negation
Simple form
I can't snigger you can't snigger she can't snigger we can't snigger you can't snigger they can't snigger
V-ing form
I can't be sniggering you can't be sniggering she can't be sniggering we can't be sniggering you can't be sniggering they can't be sniggering
Perfect
I can't have sniggered you can't have sniggered she can't have sniggered we can't have sniggered you can't have sniggered they can't have sniggered
V-ing perfect
I can't have been sniggering you can't have been sniggering she can't have been sniggering we can't have been sniggering you can't have been sniggering they can't have been sniggering
Interrogative form
Simple form
can I snigger? can you snigger? can she snigger? can we snigger? can you snigger? can they snigger?
V-ing form
can I be sniggering? can you be sniggering? can she be sniggering? can we be sniggering? can you be sniggering? can they be sniggering?
Perfect
can I have sniggered? can you have sniggered? can she have sniggered? can we have sniggered? can you have sniggered? can they have sniggered?
V-ing perfect
can I have been sniggering? can you have been sniggering? can she have been sniggering? can we have been sniggering? can you have been sniggering? can they have been sniggering?
Interro-negative form
Simple form
can't I snigger? can't you snigger? can't she snigger? can't we snigger? can't you snigger? can't they snigger?
V-ing form
can't I be sniggering? can't you be sniggering? can't she be sniggering? can't we be sniggering? can't you be sniggering? can't they be sniggering?
Perfect
can't I have sniggered? can't you have sniggered? can't she have sniggered? can't we have sniggered? can't you have sniggered? can't they have sniggered?
V-ing perfect
can't I have been sniggering? can't you have been sniggering? can't she have been sniggering? can't we have been sniggering? can't you have been sniggering? can't they have been sniggering?