I can bard you can bard he can bard we can bard you can bard they can bard
V-ing form
I can be barding you can be barding he can be barding we can be barding you can be barding they can be barding
Perfect
I can have barded you can have barded he can have barded we can have barded you can have barded they can have barded
V-ing perfect
I can have been barding you can have been barding he can have been barding we can have been barding you can have been barding they can have been barding
Negation
Simple form
I can't bard you can't bard he can't bard we can't bard you can't bard they can't bard
V-ing form
I can't be barding you can't be barding he can't be barding we can't be barding you can't be barding they can't be barding
Perfect
I can't have barded you can't have barded he can't have barded we can't have barded you can't have barded they can't have barded
V-ing perfect
I can't have been barding you can't have been barding he can't have been barding we can't have been barding you can't have been barding they can't have been barding
Interrogative form
Simple form
can I bard? can you bard? can he bard? can we bard? can you bard? can they bard?
V-ing form
can I be barding? can you be barding? can he be barding? can we be barding? can you be barding? can they be barding?
Perfect
can I have barded? can you have barded? can he have barded? can we have barded? can you have barded? can they have barded?
V-ing perfect
can I have been barding? can you have been barding? can he have been barding? can we have been barding? can you have been barding? can they have been barding?
Interro-negative form
Simple form
can't I bard? can't you bard? can't he bard? can't we bard? can't you bard? can't they bard?
V-ing form
can't I be barding? can't you be barding? can't he be barding? can't we be barding? can't you be barding? can't they be barding?
Perfect
can't I have barded? can't you have barded? can't he have barded? can't we have barded? can't you have barded? can't they have barded?
V-ing perfect
can't I have been barding? can't you have been barding? can't he have been barding? can't we have been barding? can't you have been barding? can't they have been barding?