ought to cost
Irregular verb: cost - cost- cost

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to cost
you ought to cost
she 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
she ought to be costing
we ought to be costing
you ought to be costing
they ought to be costing	I ought to have cost
you ought to have cost
she 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
she 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 	Perfect 	V-ing perfect 	
I oughtn't to cost
you oughtn't to cost
she 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
she oughtn't to be costing
we oughtn't to be costing
you oughtn't to be costing
they oughtn't to be costing	I oughtn't to have cost
you oughtn't to have cost
she 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
she 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 	Perfect 	V-ing perfect 	
ought to I cost?
ought to you cost?
ought to she 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 she be costing?
ought to we be costing?
ought to you be costing?
ought to they be costing? 	ought to I have cost?
ought to you have cost?
ought to she 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 she 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 	Perfect 	V-ing perfect 	
oughtn't I to cost?
oughtn't you to cost?
oughtn't she 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 she to be costing?
oughtn't we to be costing?
oughtn't you to be costing?
oughtn't they to be costing? 	oughtn't I to have cost?
oughtn't you to have cost?
oughtn't she 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 she 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?