can purchase
Verbo regular: purchase - purchased- purchased

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can't purchase
you can't purchase
he can't purchase
we can't purchase
you can't purchase
they can't purchase 	I can't be purchasing
you can't be purchasing
he can't be purchasing
we can't be purchasing
you can't be purchasing
they can't be purchasing	I can't have purchased
you can't have purchased
he can't have purchased
we can't have purchased
you can't have purchased
they can't have purchased	I can't have been purchasing
you can't have been purchasing
he can't have been purchasing
we can't have been purchasing
you can't have been purchasing
they can't have been purchasing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can't I purchase?
can't you purchase?
can't he purchase?
can't we purchase?
can't you purchase?
can't they purchase? 	can't I be purchasing?
can't you be purchasing?
can't he be purchasing?
can't we be purchasing?
can't you be purchasing?
can't they be purchasing? 	can't I have purchased?
can't you have purchased?
can't he have purchased?
can't we have purchased?
can't you have purchased?
can't they have purchased? 	can't I have been purchasing?
can't you have been purchasing?
can't he have been purchasing?
can't we have been purchasing?
can't you have been purchasing?
can't they have been purchasing?