shall double-bill
Regular verb: double-bill - double-billed- double-billed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall double-bill
you shall double-bill
he shall double-bill
we shall double-bill
you shall double-bill
they shall double-bill 	I shall be double-billing
you shall be double-billing
he shall be double-billing
we shall be double-billing
you shall be double-billing
they shall be double-billing	I shall have double-billed
you shall have double-billed
he shall have double-billed
we shall have double-billed
you shall have double-billed
they shall have double-billed	I shall have been double-billing
you shall have been double-billing
he shall have been double-billing
we shall have been double-billing
you shall have been double-billing
they shall have been double-billing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not double-bill
you shall not double-bill
he shall not double-bill
we shall not double-bill
you shall not double-bill
they shall not double-bill 	I shall not be double-billing
you shall not be double-billing
he shall not be double-billing
we shall not be double-billing
you shall not be double-billing
they shall not be double-billing	I shall not have double-billed
you shall not have double-billed
he shall not have double-billed
we shall not have double-billed
you shall not have double-billed
they shall not have double-billed	I shall not have been double-billing
you shall not have been double-billing
he shall not have been double-billing
we shall not have been double-billing
you shall not have been double-billing
they shall not have been double-billing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I double-bill?
shall you double-bill?
shall he double-bill?
shall we double-bill?
shall you double-bill?
shall they double-bill? 	shall I be double-billing?
shall you be double-billing?
shall he be double-billing?
shall we be double-billing?
shall you be double-billing?
shall they be double-billing? 	shall I have double-billed?
shall you have double-billed?
shall he have double-billed?
shall we have double-billed?
shall you have double-billed?
shall they have double-billed? 	shall I have been double-billing?
shall you have been double-billing?
shall he have been double-billing?
shall we have been double-billing?
shall you have been double-billing?
shall they have been double-billing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not double-bill?
shall you not double-bill?
shall he not double-bill?
shall we not double-bill?
shall you not double-bill?
shall they not double-bill? 	shall I not be double-billing?
shall you not be double-billing?
shall he not be double-billing?
shall we not be double-billing?
shall you not be double-billing?
shall they not be double-billing? 	shall I not have double-billed?
shall you not have double-billed?
shall he not have double-billed?
shall we not have double-billed?
shall you not have double-billed?
shall they not have double-billed? 	shall I not have been double-billing?
shall you not have been double-billing?
shall he not have been double-billing?
shall we not have been double-billing?
shall you not have been double-billing?
shall they not have been double-billing?