should lighten
Verbo regular: lighten - lightened- lightened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should lighten
you should lighten
he should lighten
we should lighten
you should lighten
they should lighten 	I should be lightening
you should be lightening
he should be lightening
we should be lightening
you should be lightening
they should be lightening	I should have lightened
you should have lightened
he should have lightened
we should have lightened
you should have lightened
they should have lightened	I should have been lightening
you should have been lightening
he should have been lightening
we should have been lightening
you should have been lightening
they should have been lightening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I should not lighten
you should not lighten
he should not lighten
we should not lighten
you should not lighten
they should not lighten 	I should not be lightening
you should not be lightening
he should not be lightening
we should not be lightening
you should not be lightening
they should not be lightening	I should not have lightened
you should not have lightened
he should not have lightened
we should not have lightened
you should not have lightened
they should not have lightened	I should not have been lightening
you should not have been lightening
he should not have been lightening
we should not have been lightening
you should not have been lightening
they should not have been lightening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I lighten?
should you lighten?
should he lighten?
should we lighten?
should you lighten?
should they lighten? 	should I be lightening?
should you be lightening?
should he be lightening?
should we be lightening?
should you be lightening?
should they be lightening? 	should I have lightened?
should you have lightened?
should he have lightened?
should we have lightened?
should you have lightened?
should they have lightened? 	should I have been lightening?
should you have been lightening?
should he have been lightening?
should we have been lightening?
should you have been lightening?
should they have been lightening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I not lighten?
should you not lighten?
should he not lighten?
should we not lighten?
should you not lighten?
should they not lighten? 	should I not be lightening?
should you not be lightening?
should he not be lightening?
should we not be lightening?
should you not be lightening?
should they not be lightening? 	should I not have lightened?
should you not have lightened?
should he not have lightened?
should we not have lightened?
should you not have lightened?
should they not have lightened? 	should I not have been lightening?
should you not have been lightening?
should he not have been lightening?
should we not have been lightening?
should you not have been lightening?
should they not have been lightening?