I can ball you can ball she can ball we can ball you can ball they can ball
V-ing form
I can be balling you can be balling she can be balling we can be balling you can be balling they can be balling
Perfect
I can have balled you can have balled she 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 she 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 she 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 she 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 she 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 she 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 she ball? can we ball? can you ball? can they ball?
V-ing form
can I be balling? can you be balling? can she be balling? can we be balling? can you be balling? can they be balling?
Perfect
can I have balled? can you have balled? can she 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 she 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 she 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 she 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 she 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 she have been balling? can't we have been balling? can't you have been balling? can't they have been balling?