English verb conjugation
MUST PREPURCHASE

Regular verb: prepurchase - prepurchased - prepurchased

Affirmation

Simple form	V-ing form
I must prepurchase you must prepurchase he must prepurchase we must prepurchase you must prepurchase they must prepurchase	I must be prepurchasing you must be prepurchasing he must be prepurchasing we must be prepurchasing you must be prepurchasing they must be prepurchasing
Perfect	V-ing perfect
I must have prepurchased you must have prepurchased he must have prepurchased we must have prepurchased you must have prepurchased they must have prepurchased	I must have been prepurchasing you must have been prepurchasing he must have been prepurchasing we must have been prepurchasing you must have been prepurchasing they must have been prepurchasing

Negation

Simple form	V-ing form
I mustn't prepurchase you mustn't prepurchase he mustn't prepurchase we mustn't prepurchase you mustn't prepurchase they mustn't prepurchase	I mustn't be prepurchasing you mustn't be prepurchasing he mustn't be prepurchasing we mustn't be prepurchasing you mustn't be prepurchasing they mustn't be prepurchasing
Perfect	V-ing perfect
I mustn't have prepurchased you mustn't have prepurchased he mustn't have prepurchased we mustn't have prepurchased you mustn't have prepurchased they mustn't have prepurchased	I mustn't have been prepurchasing you mustn't have been prepurchasing he mustn't have been prepurchasing we mustn't have been prepurchasing you mustn't have been prepurchasing they mustn't have been prepurchasing

Interrogative form

Simple form	V-ing form
must I prepurchase? must you prepurchase? must he prepurchase? must we prepurchase? must you prepurchase? must they prepurchase?	must I be prepurchasing? must you be prepurchasing? must he be prepurchasing? must we be prepurchasing? must you be prepurchasing? must they be prepurchasing?
Perfect	V-ing perfect
must I have prepurchased? must you have prepurchased? must he have prepurchased? must we have prepurchased? must you have prepurchased? must they have prepurchased?	must I have been prepurchasing? must you have been prepurchasing? must he have been prepurchasing? must we have been prepurchasing? must you have been prepurchasing? must they have been prepurchasing?

Interro-negative form

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