ought to purchase
Verbo regular: purchase - purchased- purchased

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I ought not to purchase
you ought not to purchase
he ought not to purchase
we ought not to purchase
you ought not to purchase
they ought not to purchase 	I ought not to purchasing
you ought not to purchasing
he ought not to purchasing
we ought not to purchasing
you ought not to purchasing
they ought not to purchasing	I ought not to have purchased
you ought not to have purchased
he ought not to have purchased
we ought not to have purchased
you ought not to have purchased
they ought not to have purchased	I ought not to have been purchasing
you ought not to have been purchasing
he ought not to have been purchasing
we ought not to have been purchasing
you ought not to have been purchasing
they ought not to have been purchasing	

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

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