should pertain
Regular verb: pertain - pertained- pertained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd pertain
you'd pertain
he'd pertain
we'd pertain
you'd pertain
they'd pertain 	I'd be pertaining
you'd be pertaining
he'd be pertaining
we'd be pertaining
you'd be pertaining
they'd be pertaining	I should've pertained
you should've pertained
he should've pertained
we should've pertained
you should've pertained
they should've pertained	I should've been pertaining
you should've been pertaining
he should've been pertaining
we should've been pertaining
you should've been pertaining
they should've been pertaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't pertain
you shouldn't pertain
he shouldn't pertain
we shouldn't pertain
you shouldn't pertain
they shouldn't pertain 	I shouldn't be pertaining
you shouldn't be pertaining
he shouldn't be pertaining
we shouldn't be pertaining
you shouldn't be pertaining
they shouldn't be pertaining	I shouldn't have pertained
you shouldn't have pertained
he shouldn't have pertained
we shouldn't have pertained
you shouldn't have pertained
they shouldn't have pertained	I shouldn't have been pertaining
you shouldn't have been pertaining
he shouldn't have been pertaining
we shouldn't have been pertaining
you shouldn't have been pertaining
they shouldn't have been pertaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I pertain?
should you pertain?
should he pertain?
should we pertain?
should you pertain?
should they pertain? 	should I be pertaining?
should you be pertaining?
should he be pertaining?
should we be pertaining?
should you be pertaining?
should they be pertaining? 	should I have pertained?
should you have pertained?
should he have pertained?
should we have pertained?
should you have pertained?
should they have pertained? 	should I have been pertaining?
should you have been pertaining?
should he have been pertaining?
should we have been pertaining?
should you have been pertaining?
should they have been pertaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I pertain?
shouldn't you pertain?
shouldn't he pertain?
shouldn't we pertain?
shouldn't you pertain?
shouldn't they pertain? 	shouldn't I be pertaining?
shouldn't you be pertaining?
shouldn't he be pertaining?
shouldn't we be pertaining?
shouldn't you be pertaining?
shouldn't they be pertaining? 	shouldn't I have pertained?
shouldn't you have pertained?
shouldn't he have pertained?
shouldn't we have pertained?
shouldn't you have pertained?
shouldn't they have pertained? 	shouldn't I have been pertaining?
shouldn't you have been pertaining?
shouldn't he have been pertaining?
shouldn't we have been pertaining?
shouldn't you have been pertaining?
shouldn't they have been pertaining?