shall darken
Regular verb: darken - darkened- darkened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall darken
you shall darken
he shall darken
we shall darken
you shall darken
they shall darken 	I shall be darkening
you shall be darkening
he shall be darkening
we shall be darkening
you shall be darkening
they shall be darkening	I shall have darkened
you shall have darkened
he shall have darkened
we shall have darkened
you shall have darkened
they shall have darkened	I shall have been darkening
you shall have been darkening
he shall have been darkening
we shall have been darkening
you shall have been darkening
they shall have been darkening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not darken
you shall not darken
he shall not darken
we shall not darken
you shall not darken
they shall not darken 	I shall not be darkening
you shall not be darkening
he shall not be darkening
we shall not be darkening
you shall not be darkening
they shall not be darkening	I shall not have darkened
you shall not have darkened
he shall not have darkened
we shall not have darkened
you shall not have darkened
they shall not have darkened	I shall not have been darkening
you shall not have been darkening
he shall not have been darkening
we shall not have been darkening
you shall not have been darkening
they shall not have been darkening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I darken?
shall you darken?
shall he darken?
shall we darken?
shall you darken?
shall they darken? 	shall I be darkening?
shall you be darkening?
shall he be darkening?
shall we be darkening?
shall you be darkening?
shall they be darkening? 	shall I have darkened?
shall you have darkened?
shall he have darkened?
shall we have darkened?
shall you have darkened?
shall they have darkened? 	shall I have been darkening?
shall you have been darkening?
shall he have been darkening?
shall we have been darkening?
shall you have been darkening?
shall they have been darkening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not darken?
shall you not darken?
shall he not darken?
shall we not darken?
shall you not darken?
shall they not darken? 	shall I not be darkening?
shall you not be darkening?
shall he not be darkening?
shall we not be darkening?
shall you not be darkening?
shall they not be darkening? 	shall I not have darkened?
shall you not have darkened?
shall he not have darkened?
shall we not have darkened?
shall you not have darkened?
shall they not have darkened? 	shall I not have been darkening?
shall you not have been darkening?
shall he not have been darkening?
shall we not have been darkening?
shall you not have been darkening?
shall they not have been darkening?