could prepurchase
Verbo regular: prepurchase - prepurchased- prepurchased

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't prepurchase
you couldn't prepurchase
he 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
he couldn't be prepurchasing
we couldn't be prepurchasing
you couldn't be prepurchasing
they couldn't be prepurchasing	I couldn't have prepurchased
you couldn't have prepurchased
he 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
he couldn't have been prepurchasing
we couldn't have been prepurchasing
you couldn't have been prepurchasing
they couldn't have been prepurchasing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
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? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I prepurchase?
couldn't you prepurchase?
couldn't he 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 he be prepurchasing?
couldn't we be prepurchasing?
couldn't you be prepurchasing?
couldn't they be prepurchasing? 	couldn't I have prepurchased?
couldn't you have prepurchased?
couldn't he 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 he have been prepurchasing?
couldn't we have been prepurchasing?
couldn't you have been prepurchasing?
couldn't they have been prepurchasing?