I can bark you can bark she can bark we can bark you can bark they can bark
V-ing form
I can be barking you can be barking she can be barking we can be barking you can be barking they can be barking
Perfect
I can have barked you can have barked she can have barked we can have barked you can have barked they can have barked
V-ing perfect
I can have been barking you can have been barking she can have been barking we can have been barking you can have been barking they can have been barking
Negation
Simple form
I can't bark you can't bark she can't bark we can't bark you can't bark they can't bark
V-ing form
I can't be barking you can't be barking she can't be barking we can't be barking you can't be barking they can't be barking
Perfect
I can't have barked you can't have barked she can't have barked we can't have barked you can't have barked they can't have barked
V-ing perfect
I can't have been barking you can't have been barking she can't have been barking we can't have been barking you can't have been barking they can't have been barking
Interrogative form
Simple form
can I bark? can you bark? can she bark? can we bark? can you bark? can they bark?
V-ing form
can I be barking? can you be barking? can she be barking? can we be barking? can you be barking? can they be barking?
Perfect
can I have barked? can you have barked? can she have barked? can we have barked? can you have barked? can they have barked?
V-ing perfect
can I have been barking? can you have been barking? can she have been barking? can we have been barking? can you have been barking? can they have been barking?
Interro-negative form
Simple form
can't I bark? can't you bark? can't she bark? can't we bark? can't you bark? can't they bark?
V-ing form
can't I be barking? can't you be barking? can't she be barking? can't we be barking? can't you be barking? can't they be barking?
Perfect
can't I have barked? can't you have barked? can't she have barked? can't we have barked? can't you have barked? can't they have barked?
V-ing perfect
can't I have been barking? can't you have been barking? can't she have been barking? can't we have been barking? can't you have been barking? can't they have been barking?