ought to bill
Regular verb: bill - billed- billed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to bill
you oughtn't to bill
he oughtn't to bill
we oughtn't to bill
you oughtn't to bill
they oughtn't to bill 	I oughtn't to be billing
you oughtn't to be billing
he oughtn't to be billing
we oughtn't to be billing
you oughtn't to be billing
they oughtn't to be billing	I oughtn't to have billed
you oughtn't to have billed
he oughtn't to have billed
we oughtn't to have billed
you oughtn't to have billed
they oughtn't to have billed	I oughtn't to have been billing
you oughtn't to have been billing
he oughtn't to have been billing
we oughtn't to have been billing
you oughtn't to have been billing
they oughtn't to have been billing	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to bill?
oughtn't you to bill?
oughtn't he to bill?
oughtn't we to bill?
oughtn't you to bill?
oughtn't they to bill? 	oughtn't I to be billing?
oughtn't you to be billing?
oughtn't he to be billing?
oughtn't we to be billing?
oughtn't you to be billing?
oughtn't they to be billing? 	oughtn't I to have billed?
oughtn't you to have billed?
oughtn't he to have billed?
oughtn't we to have billed?
oughtn't you to have billed?
oughtn't they to have billed? 	oughtn't I to have been billing?
oughtn't you to have been billing?
oughtn't he to have been billing?
oughtn't we to have been billing?
oughtn't you to have been billing?
oughtn't they to have been billing?