English verb conjugation
CAN PREPURCHASE

Regular verb: prepurchase - prepurchased - prepurchased

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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