English verb conjugation
OUGHT TO BUY

Irregular verb: buy - bought - bought

Affirmation

Simple form	V-ing form
I ought to buy you ought to buy he ought to buy we ought to buy you ought to buy they ought to buy	I ought to be buying you ought to be buying he ought to be buying we ought to be buying you ought to be buying they ought to be buying
Perfect	V-ing perfect
I ought to have bought you ought to have bought he ought to have bought we ought to have bought you ought to have bought they ought to have bought	I ought to have been buying you ought to have been buying he ought to have been buying we ought to have been buying you ought to have been buying they ought to have been buying

Negation

Simple form	V-ing form
I oughtn't to buy you oughtn't to buy he oughtn't to buy we oughtn't to buy you oughtn't to buy they oughtn't to buy	I oughtn't to be buying you oughtn't to be buying he oughtn't to be buying we oughtn't to be buying you oughtn't to be buying they oughtn't to be buying
Perfect	V-ing perfect
I oughtn't to have bought you oughtn't to have bought he oughtn't to have bought we oughtn't to have bought you oughtn't to have bought they oughtn't to have bought	I oughtn't to have been buying you oughtn't to have been buying he oughtn't to have been buying we oughtn't to have been buying you oughtn't to have been buying they oughtn't to have been buying

Interrogative form

Simple form	V-ing form
ought to I buy? ought to you buy? ought to he buy? ought to we buy? ought to you buy? ought to they buy?	ought to I be buying? ought to you be buying? ought to he be buying? ought to we be buying? ought to you be buying? ought to they be buying?
Perfect	V-ing perfect
ought to I have bought? ought to you have bought? ought to he have bought? ought to we have bought? ought to you have bought? ought to they have bought?	ought to I have been buying? ought to you have been buying? ought to he have been buying? ought to we have been buying? ought to you have been buying? ought to they have been buying?

Interro-negative form

Simple form	V-ing form
oughtn't I to buy? oughtn't you to buy? oughtn't he to buy? oughtn't we to buy? oughtn't you to buy? oughtn't they to buy?	oughtn't I to be buying? oughtn't you to be buying? oughtn't he to be buying? oughtn't we to be buying? oughtn't you to be buying? oughtn't they to be buying?
Perfect	V-ing perfect
oughtn't I to have bought? oughtn't you to have bought? oughtn't he to have bought? oughtn't we to have bought? oughtn't you to have bought? oughtn't they to have bought?	oughtn't I to have been buying? oughtn't you to have been buying? oughtn't he to have been buying? oughtn't we to have been buying? oughtn't you to have been buying? oughtn't they to have been buying?