English verb conjugation
CAN COST

Irregular verb: cost - cost - cost

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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