English verb conjugation
COULD PREPURCHASE

Regular verb: prepurchase - prepurchased - prepurchased

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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