could darken
Verbo regolare: darken - darkened- darkened

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could darken
you could darken
he could darken
we could darken
you could darken
they could darken 	I could be darkening
you could be darkening
he could be darkening
we could be darkening
you could be darkening
they could be darkening	I could have darkened
you could have darkened
he could have darkened
we could have darkened
you could have darkened
they could have darkened	I could have been darkening
you could have been darkening
he could have been darkening
we could have been darkening
you could have been darkening
they could have been darkening	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not darken
you could not darken
he could not darken
we could not darken
you could not darken
they could not darken 	I could not be darkening
you could not be darkening
he could not be darkening
we could not be darkening
you could not be darkening
they could not be darkening	I could not have darkened
you could not have darkened
he could not have darkened
we could not have darkened
you could not have darkened
they could not have darkened	I could not have been darkening
you could not have been darkening
he could not have been darkening
we could not have been darkening
you could not have been darkening
they could not have been darkening	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I darken?
could you darken?
could he darken?
could we darken?
could you darken?
could they darken? 	could I be darkening?
could you be darkening?
could he be darkening?
could we be darkening?
could you be darkening?
could they be darkening? 	could I have darkened?
could you have darkened?
could he have darkened?
could we have darkened?
could you have darkened?
could they have darkened? 	could I have been darkening?
could you have been darkening?
could he have been darkening?
could we have been darkening?
could you have been darkening?
could they have been darkening? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not darken?
could you not darken?
could he not darken?
could we not darken?
could you not darken?
could they not darken? 	could I not be darkening?
could you not be darkening?
could he not be darkening?
could we not be darkening?
could you not be darkening?
could they not be darkening? 	could I not have darkened?
could you not have darkened?
could he not have darkened?
could we not have darkened?
could you not have darkened?
could they not have darkened? 	could I not have been darkening?
could you not have been darkening?
could he not have been darkening?
could we not have been darkening?
could you not have been darkening?
could they not have been darkening?