should enlighten
Regular verb: enlighten - enlightened- enlightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd enlighten
you'd enlighten
she'd enlighten
we'd enlighten
you'd enlighten
they'd enlighten 	I'd be enlightening
you'd be enlightening
she'd be enlightening
we'd be enlightening
you'd be enlightening
they'd be enlightening	I should've enlightened
you should've enlightened
she should've enlightened
we should've enlightened
you should've enlightened
they should've enlightened	I should've been enlightening
you should've been enlightening
she should've been enlightening
we should've been enlightening
you should've been enlightening
they should've been enlightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't enlighten
you shouldn't enlighten
she shouldn't enlighten
we shouldn't enlighten
you shouldn't enlighten
they shouldn't enlighten 	I shouldn't be enlightening
you shouldn't be enlightening
she shouldn't be enlightening
we shouldn't be enlightening
you shouldn't be enlightening
they shouldn't be enlightening	I shouldn't have enlightened
you shouldn't have enlightened
she shouldn't have enlightened
we shouldn't have enlightened
you shouldn't have enlightened
they shouldn't have enlightened	I shouldn't have been enlightening
you shouldn't have been enlightening
she shouldn't have been enlightening
we shouldn't have been enlightening
you shouldn't have been enlightening
they shouldn't have been enlightening	

Interrogative form 	
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should I enlighten?
should you enlighten?
should she enlighten?
should we enlighten?
should you enlighten?
should they enlighten? 	should I be enlightening?
should you be enlightening?
should she be enlightening?
should we be enlightening?
should you be enlightening?
should they be enlightening? 	should I have enlightened?
should you have enlightened?
should she have enlightened?
should we have enlightened?
should you have enlightened?
should they have enlightened? 	should I have been enlightening?
should you have been enlightening?
should she have been enlightening?
should we have been enlightening?
should you have been enlightening?
should they have been enlightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I enlighten?
shouldn't you enlighten?
shouldn't she enlighten?
shouldn't we enlighten?
shouldn't you enlighten?
shouldn't they enlighten? 	shouldn't I be enlightening?
shouldn't you be enlightening?
shouldn't she be enlightening?
shouldn't we be enlightening?
shouldn't you be enlightening?
shouldn't they be enlightening? 	shouldn't I have enlightened?
shouldn't you have enlightened?
shouldn't she have enlightened?
shouldn't we have enlightened?
shouldn't you have enlightened?
shouldn't they have enlightened? 	shouldn't I have been enlightening?
shouldn't you have been enlightening?
shouldn't she have been enlightening?
shouldn't we have been enlightening?
shouldn't you have been enlightening?
shouldn't they have been enlightening?