should ref
Verbo regular: ref - refed- refed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'd ref
you'd ref
he'd ref
we'd ref
you'd ref
they'd ref 	I'd be refing
you'd be refing
he'd be refing
we'd be refing
you'd be refing
they'd be refing	I should've refed
you should've refed
he should've refed
we should've refed
you should've refed
they should've refed	I should've been refing
you should've been refing
he should've been refing
we should've been refing
you should've been refing
they should've been refing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shouldn't ref
you shouldn't ref
he shouldn't ref
we shouldn't ref
you shouldn't ref
they shouldn't ref 	I shouldn't be refing
you shouldn't be refing
he shouldn't be refing
we shouldn't be refing
you shouldn't be refing
they shouldn't be refing	I shouldn't have refed
you shouldn't have refed
he shouldn't have refed
we shouldn't have refed
you shouldn't have refed
they shouldn't have refed	I shouldn't have been refing
you shouldn't have been refing
he shouldn't have been refing
we shouldn't have been refing
you shouldn't have been refing
they shouldn't have been refing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I ref?
should you ref?
should he ref?
should we ref?
should you ref?
should they ref? 	should I be refing?
should you be refing?
should he be refing?
should we be refing?
should you be refing?
should they be refing? 	should I have refed?
should you have refed?
should he have refed?
should we have refed?
should you have refed?
should they have refed? 	should I have been refing?
should you have been refing?
should he have been refing?
should we have been refing?
should you have been refing?
should they have been refing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shouldn't I ref?
shouldn't you ref?
shouldn't he ref?
shouldn't we ref?
shouldn't you ref?
shouldn't they ref? 	shouldn't I be refing?
shouldn't you be refing?
shouldn't he be refing?
shouldn't we be refing?
shouldn't you be refing?
shouldn't they be refing? 	shouldn't I have refed?
shouldn't you have refed?
shouldn't he have refed?
shouldn't we have refed?
shouldn't you have refed?
shouldn't they have refed? 	shouldn't I have been refing?
shouldn't you have been refing?
shouldn't he have been refing?
shouldn't we have been refing?
shouldn't you have been refing?
shouldn't they have been refing?