I ought to bill you ought to bill he ought to bill we ought to bill you ought to bill they ought to bill
V-ing form
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
Perfect
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
V-ing perfect
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
I ought not to bill you ought not to bill he ought not to bill we ought not to bill you ought not to bill they ought not to bill
V-ing form
I ought not to billing you ought not to billing he ought not to billing we ought not to billing you ought not to billing they ought not to billing
Perfect
I ought not to have billed you ought not to have billed he ought not to have billed we ought not to have billed you ought not to have billed they ought not to have billed
V-ing perfect
I ought not to have been billing you ought not to have been billing he ought not to have been billing we ought not to have been billing you ought not to have been billing they ought not to have been billing
Interrogative form
Simple form
ought to I bill? ought to you bill? ought to he bill? ought to we bill? ought to you bill? ought to they bill?
V-ing form
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?
Perfect
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?
V-ing perfect
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
ought I not to bill? ought you not to bill? ought he not to bill? ought we not to bill? ought you not to bill? ought they not to bill?
V-ing form
ought I not to be billing? ought you not to be billing? ought he not to be billing? ought we not to be billing? ought you not to be billing? ought they not to be billing?
Perfect
ought I not to have billed? ought you not to have billed? ought he not to have billed? ought we not to have billed? ought you not to have billed? ought they not to have billed?
V-ing perfect
ought I not to have been billing? ought you not to have been billing? ought he not to have been billing? ought we not to have been billing? ought you not to have been billing? ought they not to have been billing?