should checker
Regular verb: checker - checkered- checkered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd checker
you'd checker
she'd checker
we'd checker
you'd checker
they'd checker 	I'd be checkering
you'd be checkering
she'd be checkering
we'd be checkering
you'd be checkering
they'd be checkering	I should've checkered
you should've checkered
she should've checkered
we should've checkered
you should've checkered
they should've checkered	I should've been checkering
you should've been checkering
she should've been checkering
we should've been checkering
you should've been checkering
they should've been checkering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't checker
you shouldn't checker
she shouldn't checker
we shouldn't checker
you shouldn't checker
they shouldn't checker 	I shouldn't be checkering
you shouldn't be checkering
she shouldn't be checkering
we shouldn't be checkering
you shouldn't be checkering
they shouldn't be checkering	I shouldn't have checkered
you shouldn't have checkered
she shouldn't have checkered
we shouldn't have checkered
you shouldn't have checkered
they shouldn't have checkered	I shouldn't have been checkering
you shouldn't have been checkering
she shouldn't have been checkering
we shouldn't have been checkering
you shouldn't have been checkering
they shouldn't have been checkering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I checker?
should you checker?
should she checker?
should we checker?
should you checker?
should they checker? 	should I be checkering?
should you be checkering?
should she be checkering?
should we be checkering?
should you be checkering?
should they be checkering? 	should I have checkered?
should you have checkered?
should she have checkered?
should we have checkered?
should you have checkered?
should they have checkered? 	should I have been checkering?
should you have been checkering?
should she have been checkering?
should we have been checkering?
should you have been checkering?
should they have been checkering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I checker?
shouldn't you checker?
shouldn't she checker?
shouldn't we checker?
shouldn't you checker?
shouldn't they checker? 	shouldn't I be checkering?
shouldn't you be checkering?
shouldn't she be checkering?
shouldn't we be checkering?
shouldn't you be checkering?
shouldn't they be checkering? 	shouldn't I have checkered?
shouldn't you have checkered?
shouldn't she have checkered?
shouldn't we have checkered?
shouldn't you have checkered?
shouldn't they have checkered? 	shouldn't I have been checkering?
shouldn't you have been checkering?
shouldn't she have been checkering?
shouldn't we have been checkering?
shouldn't you have been checkering?
shouldn't they have been checkering?