should stab
Regular verb: stab - stabbed- stabbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd stab
you'd stab
he'd stab
we'd stab
you'd stab
they'd stab 	I'd be stabbing
you'd be stabbing
he'd be stabbing
we'd be stabbing
you'd be stabbing
they'd be stabbing	I should've stabbed
you should've stabbed
he should've stabbed
we should've stabbed
you should've stabbed
they should've stabbed	I should've been stabbing
you should've been stabbing
he should've been stabbing
we should've been stabbing
you should've been stabbing
they should've been stabbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't stab
you shouldn't stab
he shouldn't stab
we shouldn't stab
you shouldn't stab
they shouldn't stab 	I shouldn't be stabbing
you shouldn't be stabbing
he shouldn't be stabbing
we shouldn't be stabbing
you shouldn't be stabbing
they shouldn't be stabbing	I shouldn't have stabbed
you shouldn't have stabbed
he shouldn't have stabbed
we shouldn't have stabbed
you shouldn't have stabbed
they shouldn't have stabbed	I shouldn't have been stabbing
you shouldn't have been stabbing
he shouldn't have been stabbing
we shouldn't have been stabbing
you shouldn't have been stabbing
they shouldn't have been stabbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I stab?
should you stab?
should he stab?
should we stab?
should you stab?
should they stab? 	should I be stabbing?
should you be stabbing?
should he be stabbing?
should we be stabbing?
should you be stabbing?
should they be stabbing? 	should I have stabbed?
should you have stabbed?
should he have stabbed?
should we have stabbed?
should you have stabbed?
should they have stabbed? 	should I have been stabbing?
should you have been stabbing?
should he have been stabbing?
should we have been stabbing?
should you have been stabbing?
should they have been stabbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I stab?
shouldn't you stab?
shouldn't he stab?
shouldn't we stab?
shouldn't you stab?
shouldn't they stab? 	shouldn't I be stabbing?
shouldn't you be stabbing?
shouldn't he be stabbing?
shouldn't we be stabbing?
shouldn't you be stabbing?
shouldn't they be stabbing? 	shouldn't I have stabbed?
shouldn't you have stabbed?
shouldn't he have stabbed?
shouldn't we have stabbed?
shouldn't you have stabbed?
shouldn't they have stabbed? 	shouldn't I have been stabbing?
shouldn't you have been stabbing?
shouldn't he have been stabbing?
shouldn't we have been stabbing?
shouldn't you have been stabbing?
shouldn't they have been stabbing?