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 oughtn't to cost you oughtn't to cost he oughtn't to cost we oughtn't to cost you oughtn't to cost they oughtn't to cost	I oughtn't to be costing you oughtn't to be costing he oughtn't to be costing we oughtn't to be costing you oughtn't to be costing they oughtn't to be costing
Perfect	V-ing perfect
I oughtn't to have cost you oughtn't to have cost he oughtn't to have cost we oughtn't to have cost you oughtn't to have cost they oughtn't to have cost	I oughtn't to have been costing you oughtn't to have been costing he oughtn't to have been costing we oughtn't to have been costing you oughtn't to have been costing they oughtn't 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
oughtn't I to cost? oughtn't you to cost? oughtn't he to cost? oughtn't we to cost? oughtn't you to cost? oughtn't they to cost?	oughtn't I to be costing? oughtn't you to be costing? oughtn't he to be costing? oughtn't we to be costing? oughtn't you to be costing? oughtn't they to be costing?
Perfect	V-ing perfect
oughtn't I to have cost? oughtn't you to have cost? oughtn't he to have cost? oughtn't we to have cost? oughtn't you to have cost? oughtn't they to have cost?	oughtn't I to have been costing? oughtn't you to have been costing? oughtn't he to have been costing? oughtn't we to have been costing? oughtn't you to have been costing? oughtn't they to have been costing?