English verb conjugation
OUGHT TO PREPURCHASE

Regular verb: prepurchase - prepurchased - prepurchased

Affirmation

Simple form	V-ing form
I ought to prepurchase you ought to prepurchase she ought to prepurchase we ought to prepurchase you ought to prepurchase they ought to prepurchase	I ought to be prepurchasing you ought to be prepurchasing she ought to be prepurchasing we ought to be prepurchasing you ought to be prepurchasing they ought to be prepurchasing
Perfect	V-ing perfect
I ought to have prepurchased you ought to have prepurchased she ought to have prepurchased we ought to have prepurchased you ought to have prepurchased they ought to have prepurchased	I ought to have been prepurchasing you ought to have been prepurchasing she ought to have been prepurchasing we ought to have been prepurchasing you ought to have been prepurchasing they ought to have been prepurchasing

Negation

Simple form	V-ing form
I oughtn't to prepurchase you oughtn't to prepurchase she oughtn't to prepurchase we oughtn't to prepurchase you oughtn't to prepurchase they oughtn't to prepurchase	I oughtn't to be prepurchasing you oughtn't to be prepurchasing she oughtn't to be prepurchasing we oughtn't to be prepurchasing you oughtn't to be prepurchasing they oughtn't to be prepurchasing
Perfect	V-ing perfect
I oughtn't to have prepurchased you oughtn't to have prepurchased she oughtn't to have prepurchased we oughtn't to have prepurchased you oughtn't to have prepurchased they oughtn't to have prepurchased	I oughtn't to have been prepurchasing you oughtn't to have been prepurchasing she oughtn't to have been prepurchasing we oughtn't to have been prepurchasing you oughtn't to have been prepurchasing they oughtn't to have been prepurchasing

Interrogative form

Simple form	V-ing form
ought to I prepurchase? ought to you prepurchase? ought to she prepurchase? ought to we prepurchase? ought to you prepurchase? ought to they prepurchase?	ought to I be prepurchasing? ought to you be prepurchasing? ought to she be prepurchasing? ought to we be prepurchasing? ought to you be prepurchasing? ought to they be prepurchasing?
Perfect	V-ing perfect
ought to I have prepurchased? ought to you have prepurchased? ought to she have prepurchased? ought to we have prepurchased? ought to you have prepurchased? ought to they have prepurchased?	ought to I have been prepurchasing? ought to you have been prepurchasing? ought to she have been prepurchasing? ought to we have been prepurchasing? ought to you have been prepurchasing? ought to they have been prepurchasing?

Interro-negative form

Simple form	V-ing form
oughtn't I to prepurchase? oughtn't you to prepurchase? oughtn't she to prepurchase? oughtn't we to prepurchase? oughtn't you to prepurchase? oughtn't they to prepurchase?	oughtn't I to be prepurchasing? oughtn't you to be prepurchasing? oughtn't she to be prepurchasing? oughtn't we to be prepurchasing? oughtn't you to be prepurchasing? oughtn't they to be prepurchasing?
Perfect	V-ing perfect
oughtn't I to have prepurchased? oughtn't you to have prepurchased? oughtn't she to have prepurchased? oughtn't we to have prepurchased? oughtn't you to have prepurchased? oughtn't they to have prepurchased?	oughtn't I to have been prepurchasing? oughtn't you to have been prepurchasing? oughtn't she to have been prepurchasing? oughtn't we to have been prepurchasing? oughtn't you to have been prepurchasing? oughtn't they to have been prepurchasing?