could gab
Regular verb: gab - gabbed- gabbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could gab
you could gab
he could gab
we could gab
you could gab
they could gab 	I could be gabbing
you could be gabbing
he could be gabbing
we could be gabbing
you could be gabbing
they could be gabbing	I could have gabbed
you could have gabbed
he could have gabbed
we could have gabbed
you could have gabbed
they could have gabbed	I could have been gabbing
you could have been gabbing
he could have been gabbing
we could have been gabbing
you could have been gabbing
they could have been gabbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't gab
you couldn't gab
he couldn't gab
we couldn't gab
you couldn't gab
they couldn't gab 	I couldn't be gabbing
you couldn't be gabbing
he couldn't be gabbing
we couldn't be gabbing
you couldn't be gabbing
they couldn't be gabbing	I couldn't have gabbed
you couldn't have gabbed
he couldn't have gabbed
we couldn't have gabbed
you couldn't have gabbed
they couldn't have gabbed	I couldn't have been gabbing
you couldn't have been gabbing
he couldn't have been gabbing
we couldn't have been gabbing
you couldn't have been gabbing
they couldn't have been gabbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I gab?
could you gab?
could he gab?
could we gab?
could you gab?
could they gab? 	could I be gabbing?
could you be gabbing?
could he be gabbing?
could we be gabbing?
could you be gabbing?
could they be gabbing? 	could I have gabbed?
could you have gabbed?
could he have gabbed?
could we have gabbed?
could you have gabbed?
could they have gabbed? 	could I have been gabbing?
could you have been gabbing?
could he have been gabbing?
could we have been gabbing?
could you have been gabbing?
could they have been gabbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I gab?
couldn't you gab?
couldn't he gab?
couldn't we gab?
couldn't you gab?
couldn't they gab? 	couldn't I be gabbing?
couldn't you be gabbing?
couldn't he be gabbing?
couldn't we be gabbing?
couldn't you be gabbing?
couldn't they be gabbing? 	couldn't I have gabbed?
couldn't you have gabbed?
couldn't he have gabbed?
couldn't we have gabbed?
couldn't you have gabbed?
couldn't they have gabbed? 	couldn't I have been gabbing?
couldn't you have been gabbing?
couldn't he have been gabbing?
couldn't we have been gabbing?
couldn't you have been gabbing?
couldn't they have been gabbing?