may prepurchase
Regular verb: prepurchase - prepurchased- prepurchased

Affirmation 	
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I may prepurchase
you may prepurchase
she may prepurchase
we may prepurchase
you may prepurchase
they may prepurchase 	I may be prepurchasing
you may be prepurchasing
she may be prepurchasing
we may be prepurchasing
you may be prepurchasing
they may be prepurchasing	I may have prepurchased
you may have prepurchased
she may have prepurchased
we may have prepurchased
you may have prepurchased
they may have prepurchased	I may have been prepurchasing
you may have been prepurchasing
she may have been prepurchasing
we may have been prepurchasing
you may have been prepurchasing
they may have been prepurchasing	

Negation 	
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I may not prepurchase
you may not prepurchase
she may not prepurchase
we may not prepurchase
you may not prepurchase
they may not prepurchase 	I may not be prepurchasing
you may not be prepurchasing
she may not be prepurchasing
we may not be prepurchasing
you may not be prepurchasing
they may not be prepurchasing	I may not have prepurchased
you may not have prepurchased
she may not have prepurchased
we may not have prepurchased
you may not have prepurchased
they may not have prepurchased	I may not have been prepurchasing
you may not have been prepurchasing
she may not have been prepurchasing
we may not have been prepurchasing
you may not have been prepurchasing
they may not have been prepurchasing	

Interrogative form 	
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may I prepurchase?
may you prepurchase?
may she prepurchase?
may we prepurchase?
may you prepurchase?
may they prepurchase? 	may I be prepurchasing?
may you be prepurchasing?
may she be prepurchasing?
may we be prepurchasing?
may you be prepurchasing?
may they be prepurchasing? 	may I have prepurchased?
may you have prepurchased?
may she have prepurchased?
may we have prepurchased?
may you have prepurchased?
may they have prepurchased? 	may I have been prepurchasing?
may you have been prepurchasing?
may she have been prepurchasing?
may we have been prepurchasing?
may you have been prepurchasing?
may they have been prepurchasing? 	

Interro-negative form 	
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may I not prepurchase?
may you not prepurchase?
may she not prepurchase?
may we not prepurchase?
may you not prepurchase?
may they not prepurchase? 	may I not be prepurchasing?
may you not be prepurchasing?
may she not be prepurchasing?
may we not be prepurchasing?
may you not be prepurchasing?
may they not be prepurchasing? 	may I not have prepurchased?
may you not have prepurchased?
may she not have prepurchased?
may we not have prepurchased?
may you not have prepurchased?
may they not have prepurchased? 	may I not have been prepurchasing?
may you not have been prepurchasing?
may she not have been prepurchasing?
may we not have been prepurchasing?
may you not have been prepurchasing?
may they not have been prepurchasing?