I can slap you can slap she can slap we can slap you can slap they can slap
V-ing form
I can be slapping you can be slapping she can be slapping we can be slapping you can be slapping they can be slapping
Perfect
I can have slapped you can have slapped she can have slapped we can have slapped you can have slapped they can have slapped
V-ing perfect
I can have been slapping you can have been slapping she can have been slapping we can have been slapping you can have been slapping they can have been slapping
Negation
Simple form
I can't slap you can't slap she can't slap we can't slap you can't slap they can't slap
V-ing form
I can't be slapping you can't be slapping she can't be slapping we can't be slapping you can't be slapping they can't be slapping
Perfect
I can't have slapped you can't have slapped she can't have slapped we can't have slapped you can't have slapped they can't have slapped
V-ing perfect
I can't have been slapping you can't have been slapping she can't have been slapping we can't have been slapping you can't have been slapping they can't have been slapping
Interrogative form
Simple form
can I slap? can you slap? can she slap? can we slap? can you slap? can they slap?
V-ing form
can I be slapping? can you be slapping? can she be slapping? can we be slapping? can you be slapping? can they be slapping?
Perfect
can I have slapped? can you have slapped? can she have slapped? can we have slapped? can you have slapped? can they have slapped?
V-ing perfect
can I have been slapping? can you have been slapping? can she have been slapping? can we have been slapping? can you have been slapping? can they have been slapping?
Interro-negative form
Simple form
can't I slap? can't you slap? can't she slap? can't we slap? can't you slap? can't they slap?
V-ing form
can't I be slapping? can't you be slapping? can't she be slapping? can't we be slapping? can't you be slapping? can't they be slapping?
Perfect
can't I have slapped? can't you have slapped? can't she have slapped? can't we have slapped? can't you have slapped? can't they have slapped?
V-ing perfect
can't I have been slapping? can't you have been slapping? can't she have been slapping? can't we have been slapping? can't you have been slapping? can't they have been slapping?