may sum
Verbo regular: sum - summed- summed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may sum
you may sum
he may sum
we may sum
you may sum
they may sum 	I may be summing
you may be summing
he may be summing
we may be summing
you may be summing
they may be summing	I may have summed
you may have summed
he may have summed
we may have summed
you may have summed
they may have summed	I may have been summing
you may have been summing
he may have been summing
we may have been summing
you may have been summing
they may have been summing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't sum
you mayn't sum
he mayn't sum
we mayn't sum
you mayn't sum
they mayn't sum 	I mayn't be summing
you mayn't be summing
he mayn't be summing
we mayn't be summing
you mayn't be summing
they mayn't be summing	I mayn't have summed
you mayn't have summed
he mayn't have summed
we mayn't have summed
you mayn't have summed
they mayn't have summed	I mayn't have been summing
you mayn't have been summing
he mayn't have been summing
we mayn't have been summing
you mayn't have been summing
they mayn't have been summing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I sum?
may you sum?
may he sum?
may we sum?
may you sum?
may they sum? 	may I be summing?
may you be summing?
may he be summing?
may we be summing?
may you be summing?
may they be summing? 	may I have summed?
may you have summed?
may he have summed?
may we have summed?
may you have summed?
may they have summed? 	may I have been summing?
may you have been summing?
may he have been summing?
may we have been summing?
may you have been summing?
may they have been summing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I sum?
mayn't you sum?
mayn't he sum?
mayn't we sum?
mayn't you sum?
mayn't they sum? 	mayn't I be summing?
mayn't you be summing?
mayn't he be summing?
mayn't we be summing?
mayn't you be summing?
mayn't they be summing? 	mayn't I have summed?
mayn't you have summed?
mayn't he have summed?
mayn't we have summed?
mayn't you have summed?
mayn't they have summed? 	mayn't I have been summing?
mayn't you have been summing?
mayn't he have been summing?
mayn't we have been summing?
mayn't you have been summing?
mayn't they have been summing?