can purchase
Verbo regular: purchase - purchased- purchased

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can purchase
you can purchase
he can purchase
we can purchase
you can purchase
they can purchase 	I can be purchasing
you can be purchasing
he can be purchasing
we can be purchasing
you can be purchasing
they can be purchasing	I can have purchased
you can have purchased
he can have purchased
we can have purchased
you can have purchased
they can have purchased	I can have been purchasing
you can have been purchasing
he can have been purchasing
we can have been purchasing
you can have been purchasing
they can have been purchasing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot purchase
you cannot purchase
he cannot purchase
we cannot purchase
you cannot purchase
they cannot purchase 	I cannot be purchasing
you cannot be purchasing
he cannot be purchasing
we cannot be purchasing
you cannot be purchasing
they cannot be purchasing	I cannot have purchased
you cannot have purchased
he cannot have purchased
we cannot have purchased
you cannot have purchased
they cannot have purchased	I cannot have been purchasing
you cannot have been purchasing
he cannot have been purchasing
we cannot have been purchasing
you cannot have been purchasing
they cannot have been purchasing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I purchase?
can you purchase?
can he purchase?
can we purchase?
can you purchase?
can they purchase? 	can I be purchasing?
can you be purchasing?
can he be purchasing?
can we be purchasing?
can you be purchasing?
can they be purchasing? 	can I have purchased?
can you have purchased?
can he have purchased?
can we have purchased?
can you have purchased?
can they have purchased? 	can I have been purchasing?
can you have been purchasing?
can he have been purchasing?
can we have been purchasing?
can you have been purchasing?
can they have been purchasing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not purchase?
can you not purchase?
can he not purchase?
can we not purchase?
can you not purchase?
can they not purchase? 	can I not be purchasing?
can you not be purchasing?
can he not be purchasing?
can we not be purchasing?
can you not be purchasing?
can they not be purchasing? 	can I not have purchased?
can you not have purchased?
can he not have purchased?
can we not have purchased?
can you not have purchased?
can they not have purchased? 	can I not have been purchasing?
can you not have been purchasing?
can he not have been purchasing?
can we not have been purchasing?
can you not have been purchasing?
can they not have been purchasing?