should persevere
Regular verb: persevere - persevered- persevered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd persevere
you'd persevere
she'd persevere
we'd persevere
you'd persevere
they'd persevere 	I'd be persevering
you'd be persevering
she'd be persevering
we'd be persevering
you'd be persevering
they'd be persevering	I should've persevered
you should've persevered
she should've persevered
we should've persevered
you should've persevered
they should've persevered	I should've been persevering
you should've been persevering
she should've been persevering
we should've been persevering
you should've been persevering
they should've been persevering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't persevere
you shouldn't persevere
she shouldn't persevere
we shouldn't persevere
you shouldn't persevere
they shouldn't persevere 	I shouldn't be persevering
you shouldn't be persevering
she shouldn't be persevering
we shouldn't be persevering
you shouldn't be persevering
they shouldn't be persevering	I shouldn't have persevered
you shouldn't have persevered
she shouldn't have persevered
we shouldn't have persevered
you shouldn't have persevered
they shouldn't have persevered	I shouldn't have been persevering
you shouldn't have been persevering
she shouldn't have been persevering
we shouldn't have been persevering
you shouldn't have been persevering
they shouldn't have been persevering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I persevere?
should you persevere?
should she persevere?
should we persevere?
should you persevere?
should they persevere? 	should I be persevering?
should you be persevering?
should she be persevering?
should we be persevering?
should you be persevering?
should they be persevering? 	should I have persevered?
should you have persevered?
should she have persevered?
should we have persevered?
should you have persevered?
should they have persevered? 	should I have been persevering?
should you have been persevering?
should she have been persevering?
should we have been persevering?
should you have been persevering?
should they have been persevering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I persevere?
shouldn't you persevere?
shouldn't she persevere?
shouldn't we persevere?
shouldn't you persevere?
shouldn't they persevere? 	shouldn't I be persevering?
shouldn't you be persevering?
shouldn't she be persevering?
shouldn't we be persevering?
shouldn't you be persevering?
shouldn't they be persevering? 	shouldn't I have persevered?
shouldn't you have persevered?
shouldn't she have persevered?
shouldn't we have persevered?
shouldn't you have persevered?
shouldn't they have persevered? 	shouldn't I have been persevering?
shouldn't you have been persevering?
shouldn't she have been persevering?
shouldn't we have been persevering?
shouldn't you have been persevering?
shouldn't they have been persevering?