should brighten
Regular verb: brighten - brightened- brightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd brighten
you'd brighten
she'd brighten
we'd brighten
you'd brighten
they'd brighten 	I'd be brightening
you'd be brightening
she'd be brightening
we'd be brightening
you'd be brightening
they'd be brightening	I should've brightened
you should've brightened
she should've brightened
we should've brightened
you should've brightened
they should've brightened	I should've been brightening
you should've been brightening
she should've been brightening
we should've been brightening
you should've been brightening
they should've been brightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't brighten
you shouldn't brighten
she shouldn't brighten
we shouldn't brighten
you shouldn't brighten
they shouldn't brighten 	I shouldn't be brightening
you shouldn't be brightening
she shouldn't be brightening
we shouldn't be brightening
you shouldn't be brightening
they shouldn't be brightening	I shouldn't have brightened
you shouldn't have brightened
she shouldn't have brightened
we shouldn't have brightened
you shouldn't have brightened
they shouldn't have brightened	I shouldn't have been brightening
you shouldn't have been brightening
she shouldn't have been brightening
we shouldn't have been brightening
you shouldn't have been brightening
they shouldn't have been brightening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I brighten?
should you brighten?
should she brighten?
should we brighten?
should you brighten?
should they brighten? 	should I be brightening?
should you be brightening?
should she be brightening?
should we be brightening?
should you be brightening?
should they be brightening? 	should I have brightened?
should you have brightened?
should she have brightened?
should we have brightened?
should you have brightened?
should they have brightened? 	should I have been brightening?
should you have been brightening?
should she have been brightening?
should we have been brightening?
should you have been brightening?
should they have been brightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I brighten?
shouldn't you brighten?
shouldn't she brighten?
shouldn't we brighten?
shouldn't you brighten?
shouldn't they brighten? 	shouldn't I be brightening?
shouldn't you be brightening?
shouldn't she be brightening?
shouldn't we be brightening?
shouldn't you be brightening?
shouldn't they be brightening? 	shouldn't I have brightened?
shouldn't you have brightened?
shouldn't she have brightened?
shouldn't we have brightened?
shouldn't you have brightened?
shouldn't they have brightened? 	shouldn't I have been brightening?
shouldn't you have been brightening?
shouldn't she have been brightening?
shouldn't we have been brightening?
shouldn't you have been brightening?
shouldn't they have been brightening?