could flack
Regular verb: flack - flacked- flacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could flack
you could flack
she could flack
we could flack
you could flack
they could flack 	I could be flacking
you could be flacking
she could be flacking
we could be flacking
you could be flacking
they could be flacking	I could have flacked
you could have flacked
she could have flacked
we could have flacked
you could have flacked
they could have flacked	I could have been flacking
you could have been flacking
she could have been flacking
we could have been flacking
you could have been flacking
they could have been flacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't flack
you couldn't flack
she couldn't flack
we couldn't flack
you couldn't flack
they couldn't flack 	I couldn't be flacking
you couldn't be flacking
she couldn't be flacking
we couldn't be flacking
you couldn't be flacking
they couldn't be flacking	I couldn't have flacked
you couldn't have flacked
she couldn't have flacked
we couldn't have flacked
you couldn't have flacked
they couldn't have flacked	I couldn't have been flacking
you couldn't have been flacking
she couldn't have been flacking
we couldn't have been flacking
you couldn't have been flacking
they couldn't have been flacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I flack?
could you flack?
could she flack?
could we flack?
could you flack?
could they flack? 	could I be flacking?
could you be flacking?
could she be flacking?
could we be flacking?
could you be flacking?
could they be flacking? 	could I have flacked?
could you have flacked?
could she have flacked?
could we have flacked?
could you have flacked?
could they have flacked? 	could I have been flacking?
could you have been flacking?
could she have been flacking?
could we have been flacking?
could you have been flacking?
could they have been flacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I flack?
couldn't you flack?
couldn't she flack?
couldn't we flack?
couldn't you flack?
couldn't they flack? 	couldn't I be flacking?
couldn't you be flacking?
couldn't she be flacking?
couldn't we be flacking?
couldn't you be flacking?
couldn't they be flacking? 	couldn't I have flacked?
couldn't you have flacked?
couldn't she have flacked?
couldn't we have flacked?
couldn't you have flacked?
couldn't they have flacked? 	couldn't I have been flacking?
couldn't you have been flacking?
couldn't she have been flacking?
couldn't we have been flacking?
couldn't you have been flacking?
couldn't they have been flacking?