may double-bill
Regular verb: double-bill - double-billed- double-billed

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

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

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

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