English verb conjugation
SHALL COST

Irregular verb: cost - cost - cost

Affirmation

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

Negation

Simple form	V-ing form
I shan't cost you shan't cost he shan't cost we shan't cost you shan't cost they shan't cost	I shan't be costing you shan't be costing he shan't be costing we shan't be costing you shan't be costing they shan't be costing
Perfect	V-ing perfect
I shan't have cost you shan't have cost he shan't have cost we shan't have cost you shan't have cost they shan't have cost	I shan't have been costing you shan't have been costing he shan't have been costing we shan't have been costing you shan't have been costing they shan't have been costing

Interrogative form

Simple form	V-ing form
shall I cost? shall you cost? shall he cost? shall we cost? shall you cost? shall they cost?	shall I be costing? shall you be costing? shall he 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 he 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 he 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
shan't I cost? shan't you cost? shan't he cost? shan't we cost? shan't you cost? shan't they cost?	shan't I be costing? shan't you be costing? shan't he be costing? shan't we be costing? shan't you be costing? shan't they be costing?
Perfect	V-ing perfect
shan't I have cost? shan't you have cost? shan't he have cost? shan't we have cost? shan't you have cost? shan't they have cost?	shan't I have been costing? shan't you have been costing? shan't he have been costing? shan't we have been costing? shan't you have been costing? shan't they have been costing?