could lighten
Verbo regolare: lighten - lightened- lightened

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could lighten
you could lighten
he could lighten
we could lighten
you could lighten
they could lighten 	I could be lightening
you could be lightening
he could be lightening
we could be lightening
you could be lightening
they could be lightening	I could have lightened
you could have lightened
he could have lightened
we could have lightened
you could have lightened
they could have lightened	I could have been lightening
you could have been lightening
he could have been lightening
we could have been lightening
you could have been lightening
they could have been lightening	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't lighten
you couldn't lighten
he couldn't lighten
we couldn't lighten
you couldn't lighten
they couldn't lighten 	I couldn't be lightening
you couldn't be lightening
he couldn't be lightening
we couldn't be lightening
you couldn't be lightening
they couldn't be lightening	I couldn't have lightened
you couldn't have lightened
he couldn't have lightened
we couldn't have lightened
you couldn't have lightened
they couldn't have lightened	I couldn't have been lightening
you couldn't have been lightening
he couldn't have been lightening
we couldn't have been lightening
you couldn't have been lightening
they couldn't have been lightening	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I lighten?
could you lighten?
could he lighten?
could we lighten?
could you lighten?
could they lighten? 	could I be lightening?
could you be lightening?
could he be lightening?
could we be lightening?
could you be lightening?
could they be lightening? 	could I have lightened?
could you have lightened?
could he have lightened?
could we have lightened?
could you have lightened?
could they have lightened? 	could I have been lightening?
could you have been lightening?
could he have been lightening?
could we have been lightening?
could you have been lightening?
could they have been lightening? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I lighten?
couldn't you lighten?
couldn't he lighten?
couldn't we lighten?
couldn't you lighten?
couldn't they lighten? 	couldn't I be lightening?
couldn't you be lightening?
couldn't he be lightening?
couldn't we be lightening?
couldn't you be lightening?
couldn't they be lightening? 	couldn't I have lightened?
couldn't you have lightened?
couldn't he have lightened?
couldn't we have lightened?
couldn't you have lightened?
couldn't they have lightened? 	couldn't I have been lightening?
couldn't you have been lightening?
couldn't he have been lightening?
couldn't we have been lightening?
couldn't you have been lightening?
couldn't they have been lightening?