I may refine you may refine she may refine we may refine you may refine they may refine
Forma con V-ing
I may be refining you may be refining she may be refining we may be refining you may be refining they may be refining
Perfecto
I may have refined you may have refined she may have refined we may have refined you may have refined they may have refined
Perfecto con V-ing
I may have been refining you may have been refining she may have been refining we may have been refining you may have been refining they may have been refining
Negación
Forma simple
I may not refine you may not refine she may not refine we may not refine you may not refine they may not refine
Forma con V-ing
I may not be refining you may not be refining she may not be refining we may not be refining you may not be refining they may not be refining
Perfecto
I may not have refined you may not have refined she may not have refined we may not have refined you may not have refined they may not have refined
Perfecto con V-ing
I may not have been refining you may not have been refining she may not have been refining we may not have been refining you may not have been refining they may not have been refining
Forma interrogativa
Forma simple
may I refine? may you refine? may she refine? may we refine? may you refine? may they refine?
Forma con V-ing
may I be refining? may you be refining? may she be refining? may we be refining? may you be refining? may they be refining?
Perfecto
may I have refined? may you have refined? may she have refined? may we have refined? may you have refined? may they have refined?
Perfecto con V-ing
may I have been refining? may you have been refining? may she have been refining? may we have been refining? may you have been refining? may they have been refining?
Forma interro-negativa
Forma simple
may I not refine? may you not refine? may she not refine? may we not refine? may you not refine? may they not refine?
Forma con V-ing
may I not be refining? may you not be refining? may she not be refining? may we not be refining? may you not be refining? may they not be refining?
Perfecto
may I not have refined? may you not have refined? may she not have refined? may we not have refined? may you not have refined? may they not have refined?
Perfecto con V-ing
may I not have been refining? may you not have been refining? may she not have been refining? may we not have been refining? may you not have been refining? may they not have been refining?