should dull
Verbo regular: dull - dulled- dulled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I'd dull
you'd dull
she'd dull
we'd dull
you'd dull
they'd dull 	I'd be dulling
you'd be dulling
she'd be dulling
we'd be dulling
you'd be dulling
they'd be dulling	I should've dulled
you should've dulled
she should've dulled
we should've dulled
you should've dulled
they should've dulled	I should've been dulling
you should've been dulling
she should've been dulling
we should've been dulling
you should've been dulling
they should've been dulling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I shouldn't dull
you shouldn't dull
she shouldn't dull
we shouldn't dull
you shouldn't dull
they shouldn't dull 	I shouldn't be dulling
you shouldn't be dulling
she shouldn't be dulling
we shouldn't be dulling
you shouldn't be dulling
they shouldn't be dulling	I shouldn't have dulled
you shouldn't have dulled
she shouldn't have dulled
we shouldn't have dulled
you shouldn't have dulled
they shouldn't have dulled	I shouldn't have been dulling
you shouldn't have been dulling
she shouldn't have been dulling
we shouldn't have been dulling
you shouldn't have been dulling
they shouldn't have been dulling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I dull?
should you dull?
should she dull?
should we dull?
should you dull?
should they dull? 	should I be dulling?
should you be dulling?
should she be dulling?
should we be dulling?
should you be dulling?
should they be dulling? 	should I have dulled?
should you have dulled?
should she have dulled?
should we have dulled?
should you have dulled?
should they have dulled? 	should I have been dulling?
should you have been dulling?
should she have been dulling?
should we have been dulling?
should you have been dulling?
should they have been dulling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
shouldn't I dull?
shouldn't you dull?
shouldn't she dull?
shouldn't we dull?
shouldn't you dull?
shouldn't they dull? 	shouldn't I be dulling?
shouldn't you be dulling?
shouldn't she be dulling?
shouldn't we be dulling?
shouldn't you be dulling?
shouldn't they be dulling? 	shouldn't I have dulled?
shouldn't you have dulled?
shouldn't she have dulled?
shouldn't we have dulled?
shouldn't you have dulled?
shouldn't they have dulled? 	shouldn't I have been dulling?
shouldn't you have been dulling?
shouldn't she have been dulling?
shouldn't we have been dulling?
shouldn't you have been dulling?
shouldn't they have been dulling?