should dull
Verbo regular: dull - dulled- dulled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should dull
you should dull
he should dull
we should dull
you should dull
they should dull 	I should be dulling
you should be dulling
he should be dulling
we should be dulling
you should be dulling
they should be dulling	I should have dulled
you should have dulled
he should have dulled
we should have dulled
you should have dulled
they should have dulled	I should have been dulling
you should have been dulling
he should have been dulling
we should have been dulling
you should have been dulling
they should have been dulling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not dull
you should not dull
he should not dull
we should not dull
you should not dull
they should not dull 	I should not be dulling
you should not be dulling
he should not be dulling
we should not be dulling
you should not be dulling
they should not be dulling	I should not have dulled
you should not have dulled
he should not have dulled
we should not have dulled
you should not have dulled
they should not have dulled	I should not have been dulling
you should not have been dulling
he should not have been dulling
we should not have been dulling
you should not have been dulling
they should not have been dulling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I dull?
should you dull?
should he dull?
should we dull?
should you dull?
should they dull? 	should I be dulling?
should you be dulling?
should he be dulling?
should we be dulling?
should you be dulling?
should they be dulling? 	should I have dulled?
should you have dulled?
should he 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 he have been dulling?
should we have been dulling?
should you have been dulling?
should they have been dulling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not dull?
should you not dull?
should he not dull?
should we not dull?
should you not dull?
should they not dull? 	should I not be dulling?
should you not be dulling?
should he not be dulling?
should we not be dulling?
should you not be dulling?
should they not be dulling? 	should I not have dulled?
should you not have dulled?
should he not have dulled?
should we not have dulled?
should you not have dulled?
should they not have dulled? 	should I not have been dulling?
should you not have been dulling?
should he not have been dulling?
should we not have been dulling?
should you not have been dulling?
should they not have been dulling?