English verb conjugation
OUGHT TO BILL

Regular verb: bill - billed - billed

Affirmation

Simple form	V-ing form
I ought to bill you ought to bill she 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 she ought to be billing we ought to be billing you ought to be billing they ought to be billing
Perfect	V-ing perfect
I ought to have billed you ought to have billed she 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 she 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
I oughtn't to bill you oughtn't to bill she 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 she oughtn't to be billing we oughtn't to be billing you oughtn't to be billing they oughtn't to be billing
Perfect	V-ing perfect
I oughtn't to have billed you oughtn't to have billed she 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 she 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
ought to I bill? ought to you bill? ought to she 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 she be billing? ought to we be billing? ought to you be billing? ought to they be billing?
Perfect	V-ing perfect
ought to I have billed? ought to you have billed? ought to she 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 she 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
oughtn't I to bill? oughtn't you to bill? oughtn't she 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 she to be billing? oughtn't we to be billing? oughtn't you to be billing? oughtn't they to be billing?
Perfect	V-ing perfect
oughtn't I to have billed? oughtn't you to have billed? oughtn't she 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 she 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?