I can slap you can slap he can slap we can slap you can slap they can slap
V-ing form
I can be slapping you can be slapping he can be slapping we can be slapping you can be slapping they can be slapping
Perfect
I can have slapped you can have slapped he 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 he 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 he 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 he 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 he 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 he 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 he slap? can we slap? can you slap? can they slap?
V-ing form
can I be slapping? can you be slapping? can he be slapping? can we be slapping? can you be slapping? can they be slapping?
Perfect
can I have slapped? can you have slapped? can he 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 he 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 he 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 he 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 he 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 he have been slapping? can't we have been slapping? can't you have been slapping? can't they have been slapping?