should preen
Regular verb: preen - preened- preened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd preen
you'd preen
she'd preen
we'd preen
you'd preen
they'd preen 	I'd be preening
you'd be preening
she'd be preening
we'd be preening
you'd be preening
they'd be preening	I should've preened
you should've preened
she should've preened
we should've preened
you should've preened
they should've preened	I should've been preening
you should've been preening
she should've been preening
we should've been preening
you should've been preening
they should've been preening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't preen
you shouldn't preen
she shouldn't preen
we shouldn't preen
you shouldn't preen
they shouldn't preen 	I shouldn't be preening
you shouldn't be preening
she shouldn't be preening
we shouldn't be preening
you shouldn't be preening
they shouldn't be preening	I shouldn't have preened
you shouldn't have preened
she shouldn't have preened
we shouldn't have preened
you shouldn't have preened
they shouldn't have preened	I shouldn't have been preening
you shouldn't have been preening
she shouldn't have been preening
we shouldn't have been preening
you shouldn't have been preening
they shouldn't have been preening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I preen?
should you preen?
should she preen?
should we preen?
should you preen?
should they preen? 	should I be preening?
should you be preening?
should she be preening?
should we be preening?
should you be preening?
should they be preening? 	should I have preened?
should you have preened?
should she have preened?
should we have preened?
should you have preened?
should they have preened? 	should I have been preening?
should you have been preening?
should she have been preening?
should we have been preening?
should you have been preening?
should they have been preening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I preen?
shouldn't you preen?
shouldn't she preen?
shouldn't we preen?
shouldn't you preen?
shouldn't they preen? 	shouldn't I be preening?
shouldn't you be preening?
shouldn't she be preening?
shouldn't we be preening?
shouldn't you be preening?
shouldn't they be preening? 	shouldn't I have preened?
shouldn't you have preened?
shouldn't she have preened?
shouldn't we have preened?
shouldn't you have preened?
shouldn't they have preened? 	shouldn't I have been preening?
shouldn't you have been preening?
shouldn't she have been preening?
shouldn't we have been preening?
shouldn't you have been preening?
shouldn't they have been preening?