English verb conjugation
OUGHT TO COST

Irregular verb: cost - cost - cost

Affirmation

Simple form	V-ing form
I ought to cost you ought to cost he ought to cost we ought to cost you ought to cost they ought to cost	I ought to be costing you ought to be costing he ought to be costing we ought to be costing you ought to be costing they ought to be costing
Perfect	V-ing perfect
I ought to have cost you ought to have cost he ought to have cost we ought to have cost you ought to have cost they ought to have cost	I ought to have been costing you ought to have been costing he ought to have been costing we ought to have been costing you ought to have been costing they ought to have been costing

Negation

Simple form	V-ing form
I ought not to cost you ought not to cost he ought not to cost we ought not to cost you ought not to cost they ought not to cost	I ought not to costing you ought not to costing he ought not to costing we ought not to costing you ought not to costing they ought not to costing
Perfect	V-ing perfect
I ought not to have cost you ought not to have cost he ought not to have cost we ought not to have cost you ought not to have cost they ought not to have cost	I ought not to have been costing you ought not to have been costing he ought not to have been costing we ought not to have been costing you ought not to have been costing they ought not to have been costing

Interrogative form

Simple form	V-ing form
ought to I cost? ought to you cost? ought to he cost? ought to we cost? ought to you cost? ought to they cost?	ought to I be costing? ought to you be costing? ought to he be costing? ought to we be costing? ought to you be costing? ought to they be costing?
Perfect	V-ing perfect
ought to I have cost? ought to you have cost? ought to he have cost? ought to we have cost? ought to you have cost? ought to they have cost?	ought to I have been costing? ought to you have been costing? ought to he have been costing? ought to we have been costing? ought to you have been costing? ought to they have been costing?

Interro-negative form

Simple form	V-ing form
ought I not to cost? ought you not to cost? ought he not to cost? ought we not to cost? ought you not to cost? ought they not to cost?	ought I not to be costing? ought you not to be costing? ought he not to be costing? ought we not to be costing? ought you not to be costing? ought they not to be costing?
Perfect	V-ing perfect
ought I not to have cost? ought you not to have cost? ought he not to have cost? ought we not to have cost? ought you not to have cost? ought they not to have cost?	ought I not to have been costing? ought you not to have been costing? ought he not to have been costing? ought we not to have been costing? ought you not to have been costing? ought they not to have been costing?