I can ball you can ball he can ball we can ball you can ball they can ball
V-ing form
I can be balling you can be balling he can be balling we can be balling you can be balling they can be balling
Perfect
I can have balled you can have balled he can have balled we can have balled you can have balled they can have balled
V-ing perfect
I can have been balling you can have been balling he can have been balling we can have been balling you can have been balling they can have been balling
Negation
Simple form
I can't ball you can't ball he can't ball we can't ball you can't ball they can't ball
V-ing form
I can't be balling you can't be balling he can't be balling we can't be balling you can't be balling they can't be balling
Perfect
I can't have balled you can't have balled he can't have balled we can't have balled you can't have balled they can't have balled
V-ing perfect
I can't have been balling you can't have been balling he can't have been balling we can't have been balling you can't have been balling they can't have been balling
Interrogative form
Simple form
can I ball? can you ball? can he ball? can we ball? can you ball? can they ball?
V-ing form
can I be balling? can you be balling? can he be balling? can we be balling? can you be balling? can they be balling?
Perfect
can I have balled? can you have balled? can he have balled? can we have balled? can you have balled? can they have balled?
V-ing perfect
can I have been balling? can you have been balling? can he have been balling? can we have been balling? can you have been balling? can they have been balling?
Interro-negative form
Simple form
can't I ball? can't you ball? can't he ball? can't we ball? can't you ball? can't they ball?
V-ing form
can't I be balling? can't you be balling? can't he be balling? can't we be balling? can't you be balling? can't they be balling?
Perfect
can't I have balled? can't you have balled? can't he have balled? can't we have balled? can't you have balled? can't they have balled?
V-ing perfect
can't I have been balling? can't you have been balling? can't he have been balling? can't we have been balling? can't you have been balling? can't they have been balling?