English verb conjugation
SHALL COST

Irregular verb: cost - cost - cost

Affirmation

Simple form	V-ing form
I shall cost you shall cost she shall cost we shall cost you shall cost they shall cost	I shall be costing you shall be costing she shall be costing we shall be costing you shall be costing they shall be costing
Perfect	V-ing perfect
I shall have cost you shall have cost she shall have cost we shall have cost you shall have cost they shall have cost	I shall have been costing you shall have been costing she shall have been costing we shall have been costing you shall have been costing they shall have been costing

Negation

Simple form	V-ing form
I shall not cost you shall not cost she shall not cost we shall not cost you shall not cost they shall not cost	I shall not be costing you shall not be costing she shall not be costing we shall not be costing you shall not be costing they shall not be costing
Perfect	V-ing perfect
I shall not have cost you shall not have cost she shall not have cost we shall not have cost you shall not have cost they shall not have cost	I shall not have been costing you shall not have been costing she shall not have been costing we shall not have been costing you shall not have been costing they shall not have been costing

Interrogative form

Simple form	V-ing form
shall I cost? shall you cost? shall she cost? shall we cost? shall you cost? shall they cost?	shall I be costing? shall you be costing? shall she be costing? shall we be costing? shall you be costing? shall they be costing?
Perfect	V-ing perfect
shall I have cost? shall you have cost? shall she have cost? shall we have cost? shall you have cost? shall they have cost?	shall I have been costing? shall you have been costing? shall she have been costing? shall we have been costing? shall you have been costing? shall they have been costing?

Interro-negative form

Simple form	V-ing form
shall I not cost? shall you not cost? shall she not cost? shall we not cost? shall you not cost? shall they not cost?	shall I not be costing? shall you not be costing? shall she not be costing? shall we not be costing? shall you not be costing? shall they not be costing?
Perfect	V-ing perfect
shall I not have cost? shall you not have cost? shall she not have cost? shall we not have cost? shall you not have cost? shall they not have cost?	shall I not have been costing? shall you not have been costing? shall she not have been costing? shall we not have been costing? shall you not have been costing? shall they not have been costing?