I can cap you can cap she can cap we can cap you can cap they can cap
V-ing form
I can be capping you can be capping she can be capping we can be capping you can be capping they can be capping
Perfect
I can have capped you can have capped she can have capped we can have capped you can have capped they can have capped
V-ing perfect
I can have been capping you can have been capping she can have been capping we can have been capping you can have been capping they can have been capping
Negation
Simple form
I can't cap you can't cap she can't cap we can't cap you can't cap they can't cap
V-ing form
I can't be capping you can't be capping she can't be capping we can't be capping you can't be capping they can't be capping
Perfect
I can't have capped you can't have capped she can't have capped we can't have capped you can't have capped they can't have capped
V-ing perfect
I can't have been capping you can't have been capping she can't have been capping we can't have been capping you can't have been capping they can't have been capping
Interrogative form
Simple form
can I cap? can you cap? can she cap? can we cap? can you cap? can they cap?
V-ing form
can I be capping? can you be capping? can she be capping? can we be capping? can you be capping? can they be capping?
Perfect
can I have capped? can you have capped? can she have capped? can we have capped? can you have capped? can they have capped?
V-ing perfect
can I have been capping? can you have been capping? can she have been capping? can we have been capping? can you have been capping? can they have been capping?
Interro-negative form
Simple form
can't I cap? can't you cap? can't she cap? can't we cap? can't you cap? can't they cap?
V-ing form
can't I be capping? can't you be capping? can't she be capping? can't we be capping? can't you be capping? can't they be capping?
Perfect
can't I have capped? can't you have capped? can't she have capped? can't we have capped? can't you have capped? can't they have capped?
V-ing perfect
can't I have been capping? can't you have been capping? can't she have been capping? can't we have been capping? can't you have been capping? can't they have been capping?