may darken
Verbo regular: darken - darkened- darkened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may darken
you may darken
he may darken
we may darken
you may darken
they may darken 	I may be darkening
you may be darkening
he may be darkening
we may be darkening
you may be darkening
they may be darkening	I may have darkened
you may have darkened
he may have darkened
we may have darkened
you may have darkened
they may have darkened	I may have been darkening
you may have been darkening
he may have been darkening
we may have been darkening
you may have been darkening
they may have been darkening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may not darken
you may not darken
he may not darken
we may not darken
you may not darken
they may not darken 	I may not be darkening
you may not be darkening
he may not be darkening
we may not be darkening
you may not be darkening
they may not be darkening	I may not have darkened
you may not have darkened
he may not have darkened
we may not have darkened
you may not have darkened
they may not have darkened	I may not have been darkening
you may not have been darkening
he may not have been darkening
we may not have been darkening
you may not have been darkening
they may not have been darkening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I darken?
may you darken?
may he darken?
may we darken?
may you darken?
may they darken? 	may I be darkening?
may you be darkening?
may he be darkening?
may we be darkening?
may you be darkening?
may they be darkening? 	may I have darkened?
may you have darkened?
may he have darkened?
may we have darkened?
may you have darkened?
may they have darkened? 	may I have been darkening?
may you have been darkening?
may he have been darkening?
may we have been darkening?
may you have been darkening?
may they have been darkening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I not darken?
may you not darken?
may he not darken?
may we not darken?
may you not darken?
may they not darken? 	may I not be darkening?
may you not be darkening?
may he not be darkening?
may we not be darkening?
may you not be darkening?
may they not be darkening? 	may I not have darkened?
may you not have darkened?
may he not have darkened?
may we not have darkened?
may you not have darkened?
may they not have darkened? 	may I not have been darkening?
may you not have been darkening?
may he not have been darkening?
may we not have been darkening?
may you not have been darkening?
may they not have been darkening?