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 cannot gab you cannot gab she cannot gab we cannot gab you cannot gab they cannot gab
V-ing form
I cannot be gabbing you cannot be gabbing she cannot be gabbing we cannot be gabbing you cannot be gabbing they cannot be gabbing
Perfect
I cannot have gabbed you cannot have gabbed she cannot have gabbed we cannot have gabbed you cannot have gabbed they cannot have gabbed
V-ing perfect
I cannot have been gabbing you cannot have been gabbing she cannot have been gabbing we cannot have been gabbing you cannot have been gabbing they cannot 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 I not gab? can you not gab? can she not gab? can we not gab? can you not gab? can they not gab?
V-ing form
can I not be gabbing? can you not be gabbing? can she not be gabbing? can we not be gabbing? can you not be gabbing? can they not be gabbing?
Perfect
can I not have gabbed? can you not have gabbed? can she not have gabbed? can we not have gabbed? can you not have gabbed? can they not have gabbed?
V-ing perfect
can I not have been gabbing? can you not have been gabbing? can she not have been gabbing? can we not have been gabbing? can you not have been gabbing? can they not have been gabbing?