may purchase
Verbo regular: purchase - purchased- purchased

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may purchase
you may purchase
he may purchase
we may purchase
you may purchase
they may purchase 	I may be purchasing
you may be purchasing
he may be purchasing
we may be purchasing
you may be purchasing
they may be purchasing	I may have purchased
you may have purchased
he may have purchased
we may have purchased
you may have purchased
they may have purchased	I may have been purchasing
you may have been purchasing
he may have been purchasing
we may have been purchasing
you may have been purchasing
they may have been purchasing	

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

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I purchase?
may you purchase?
may he purchase?
may we purchase?
may you purchase?
may they purchase? 	may I be purchasing?
may you be purchasing?
may he be purchasing?
may we be purchasing?
may you be purchasing?
may they be purchasing? 	may I have purchased?
may you have purchased?
may he have purchased?
may we have purchased?
may you have purchased?
may they have purchased? 	may I have been purchasing?
may you have been purchasing?
may he have been purchasing?
may we have been purchasing?
may you have been purchasing?
may they have been purchasing? 	

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