could fib
Verbo regular: fib - fibbed- fibbed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could fib
you could fib
he could fib
we could fib
you could fib
they could fib 	I could be fibbing
you could be fibbing
he could be fibbing
we could be fibbing
you could be fibbing
they could be fibbing	I could have fibbed
you could have fibbed
he could have fibbed
we could have fibbed
you could have fibbed
they could have fibbed	I could have been fibbing
you could have been fibbing
he could have been fibbing
we could have been fibbing
you could have been fibbing
they could have been fibbing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't fib
you couldn't fib
he couldn't fib
we couldn't fib
you couldn't fib
they couldn't fib 	I couldn't be fibbing
you couldn't be fibbing
he couldn't be fibbing
we couldn't be fibbing
you couldn't be fibbing
they couldn't be fibbing	I couldn't have fibbed
you couldn't have fibbed
he couldn't have fibbed
we couldn't have fibbed
you couldn't have fibbed
they couldn't have fibbed	I couldn't have been fibbing
you couldn't have been fibbing
he couldn't have been fibbing
we couldn't have been fibbing
you couldn't have been fibbing
they couldn't have been fibbing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I fib?
could you fib?
could he fib?
could we fib?
could you fib?
could they fib? 	could I be fibbing?
could you be fibbing?
could he be fibbing?
could we be fibbing?
could you be fibbing?
could they be fibbing? 	could I have fibbed?
could you have fibbed?
could he have fibbed?
could we have fibbed?
could you have fibbed?
could they have fibbed? 	could I have been fibbing?
could you have been fibbing?
could he have been fibbing?
could we have been fibbing?
could you have been fibbing?
could they have been fibbing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I fib?
couldn't you fib?
couldn't he fib?
couldn't we fib?
couldn't you fib?
couldn't they fib? 	couldn't I be fibbing?
couldn't you be fibbing?
couldn't he be fibbing?
couldn't we be fibbing?
couldn't you be fibbing?
couldn't they be fibbing? 	couldn't I have fibbed?
couldn't you have fibbed?
couldn't he have fibbed?
couldn't we have fibbed?
couldn't you have fibbed?
couldn't they have fibbed? 	couldn't I have been fibbing?
couldn't you have been fibbing?
couldn't he have been fibbing?
couldn't we have been fibbing?
couldn't you have been fibbing?
couldn't they have been fibbing?