could prepurchase
Regular verb: prepurchase - prepurchased- prepurchased

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could prepurchase
you could prepurchase
he could prepurchase
we could prepurchase
you could prepurchase
they could prepurchase 	I could be prepurchasing
you could be prepurchasing
he could be prepurchasing
we could be prepurchasing
you could be prepurchasing
they could be prepurchasing	I could have prepurchased
you could have prepurchased
he 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
he 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 	Perfect 	V-ing perfect 	
I could not prepurchase
you could not prepurchase
he could not prepurchase
we could not prepurchase
you could not prepurchase
they could not prepurchase 	I could not be prepurchasing
you could not be prepurchasing
he could not be prepurchasing
we could not be prepurchasing
you could not be prepurchasing
they could not be prepurchasing	I could not have prepurchased
you could not have prepurchased
he could not have prepurchased
we could not have prepurchased
you could not have prepurchased
they could not have prepurchased	I could not have been prepurchasing
you could not have been prepurchasing
he could not have been prepurchasing
we could not have been prepurchasing
you could not have been prepurchasing
they could not have been prepurchasing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I prepurchase?
could you prepurchase?
could he prepurchase?
could we prepurchase?
could you prepurchase?
could they prepurchase? 	could I be prepurchasing?
could you be prepurchasing?
could he be prepurchasing?
could we be prepurchasing?
could you be prepurchasing?
could they be prepurchasing? 	could I have prepurchased?
could you have prepurchased?
could he 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 he 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 	Perfect 	V-ing perfect 	
could I not prepurchase?
could you not prepurchase?
could he not prepurchase?
could we not prepurchase?
could you not prepurchase?
could they not prepurchase? 	could I not be prepurchasing?
could you not be prepurchasing?
could he not be prepurchasing?
could we not be prepurchasing?
could you not be prepurchasing?
could they not be prepurchasing? 	could I not have prepurchased?
could you not have prepurchased?
could he not have prepurchased?
could we not have prepurchased?
could you not have prepurchased?
could they not have prepurchased? 	could I not have been prepurchasing?
could you not have been prepurchasing?
could he not have been prepurchasing?
could we not have been prepurchasing?
could you not have been prepurchasing?
could they not have been prepurchasing?