should fib
Regular verb: fib - fibbed- fibbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd fib
you'd fib
he'd fib
we'd fib
you'd fib
they'd fib 	I'd be fibbing
you'd be fibbing
he'd be fibbing
we'd be fibbing
you'd be fibbing
they'd be fibbing	I should've fibbed
you should've fibbed
he should've fibbed
we should've fibbed
you should've fibbed
they should've fibbed	I should've been fibbing
you should've been fibbing
he should've been fibbing
we should've been fibbing
you should've been fibbing
they should've been fibbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't fib
you shouldn't fib
he shouldn't fib
we shouldn't fib
you shouldn't fib
they shouldn't fib 	I shouldn't be fibbing
you shouldn't be fibbing
he shouldn't be fibbing
we shouldn't be fibbing
you shouldn't be fibbing
they shouldn't be fibbing	I shouldn't have fibbed
you shouldn't have fibbed
he shouldn't have fibbed
we shouldn't have fibbed
you shouldn't have fibbed
they shouldn't have fibbed	I shouldn't have been fibbing
you shouldn't have been fibbing
he shouldn't have been fibbing
we shouldn't have been fibbing
you shouldn't have been fibbing
they shouldn't have been fibbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I fib?
shouldn't you fib?
shouldn't he fib?
shouldn't we fib?
shouldn't you fib?
shouldn't they fib? 	shouldn't I be fibbing?
shouldn't you be fibbing?
shouldn't he be fibbing?
shouldn't we be fibbing?
shouldn't you be fibbing?
shouldn't they be fibbing? 	shouldn't I have fibbed?
shouldn't you have fibbed?
shouldn't he have fibbed?
shouldn't we have fibbed?
shouldn't you have fibbed?
shouldn't they have fibbed? 	shouldn't I have been fibbing?
shouldn't you have been fibbing?
shouldn't he have been fibbing?
shouldn't we have been fibbing?
shouldn't you have been fibbing?
shouldn't they have been fibbing?