should fib
Verbo regular: fib - fibbed- fibbed

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not fib
you should not fib
he should not fib
we should not fib
you should not fib
they should not fib 	I should not be fibbing
you should not be fibbing
he should not be fibbing
we should not be fibbing
you should not be fibbing
they should not be fibbing	I should not have fibbed
you should not have fibbed
he should not have fibbed
we should not have fibbed
you should not have fibbed
they should not have fibbed	I should not have been fibbing
you should not have been fibbing
he should not have been fibbing
we should not have been fibbing
you should not have been fibbing
they should not have been fibbing	

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

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