could flack
Verbo regular: flack - flacked- flacked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could flack
you could flack
he could flack
we could flack
you could flack
they could flack 	I could be flacking
you could be flacking
he could be flacking
we could be flacking
you could be flacking
they could be flacking	I could have flacked
you could have flacked
he 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
he could have been flacking
we could have been flacking
you could have been flacking
they could have been flacking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't flack
you couldn't flack
he 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
he 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
he 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
he couldn't have been flacking
we couldn't have been flacking
you couldn't have been flacking
they couldn't have been flacking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I flack?
could you flack?
could he flack?
could we flack?
could you flack?
could they flack? 	could I be flacking?
could you be flacking?
could he be flacking?
could we be flacking?
could you be flacking?
could they be flacking? 	could I have flacked?
could you have flacked?
could he 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 he have been flacking?
could we have been flacking?
could you have been flacking?
could they have been flacking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I flack?
couldn't you flack?
couldn't he 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 he 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 he 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 he have been flacking?
couldn't we have been flacking?
couldn't you have been flacking?
couldn't they have been flacking?