I can gab you can gab she can gab we can gab you can gab they can gab
V-ing form
I can be gabbing you can be gabbing she can be gabbing we can be gabbing you can be gabbing they can be gabbing
Perfect
I can have gabbed you can have gabbed she can have gabbed we can have gabbed you can have gabbed they can have gabbed
V-ing perfect
I can have been gabbing you can have been gabbing she can have been gabbing we can have been gabbing you can have been gabbing they can have been gabbing
Negation
Simple form
I can't gab you can't gab she can't gab we can't gab you can't gab they can't gab
V-ing form
I can't be gabbing you can't be gabbing she can't be gabbing we can't be gabbing you can't be gabbing they can't be gabbing
Perfect
I can't have gabbed you can't have gabbed she can't have gabbed we can't have gabbed you can't have gabbed they can't have gabbed
V-ing perfect
I can't have been gabbing you can't have been gabbing she can't have been gabbing we can't have been gabbing you can't have been gabbing they can't have been gabbing
Interrogative form
Simple form
can I gab? can you gab? can she gab? can we gab? can you gab? can they gab?
V-ing form
can I be gabbing? can you be gabbing? can she be gabbing? can we be gabbing? can you be gabbing? can they be gabbing?
Perfect
can I have gabbed? can you have gabbed? can she have gabbed? can we have gabbed? can you have gabbed? can they have gabbed?
V-ing perfect
can I have been gabbing? can you have been gabbing? can she have been gabbing? can we have been gabbing? can you have been gabbing? can they have been gabbing?
Interro-negative form
Simple form
can't I gab? can't you gab? can't she gab? can't we gab? can't you gab? can't they gab?
V-ing form
can't I be gabbing? can't you be gabbing? can't she be gabbing? can't we be gabbing? can't you be gabbing? can't they be gabbing?
Perfect
can't I have gabbed? can't you have gabbed? can't she have gabbed? can't we have gabbed? can't you have gabbed? can't they have gabbed?
V-ing perfect
can't I have been gabbing? can't you have been gabbing? can't she have been gabbing? can't we have been gabbing? can't you have been gabbing? can't they have been gabbing?