Conjugación del verbo inglés
MAY SUM

Verbo regular: sum - summed - summed

Afirmación

Forma simple	Forma con 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
Perfecto	Perfecto con V-ing
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

Negación

Forma simple	Forma con V-ing
I may not sum you may not sum he may not sum we may not sum you may not sum they may not sum	I may not be summing you may not be summing he may not be summing we may not be summing you may not be summing they may not be summing
Perfecto	Perfecto con V-ing
I may not have summed you may not have summed he may not have summed we may not have summed you may not have summed they may not have summed	I may not have been summing you may not have been summing he may not have been summing we may not have been summing you may not have been summing they may not have been summing

Forma interrogativa

Forma simple	Forma con 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?
Perfecto	Perfecto con V-ing
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-negativa

Forma simple	Forma con V-ing
may I not sum? may you not sum? may he not sum? may we not sum? may you not sum? may they not sum?	may I not be summing? may you not be summing? may he not be summing? may we not be summing? may you not be summing? may they not be summing?
Perfecto	Perfecto con V-ing
may I not have summed? may you not have summed? may he not have summed? may we not have summed? may you not have summed? may they not have summed?	may I not have been summing? may you not have been summing? may he not have been summing? may we not have been summing? may you not have been summing? may they not have been summing?