English verb conjugation
MAY REFINE

Regular verb: refine - refined - refined

Affirmation

Simple form	V-ing form
I may refine you may refine he may refine we may refine you may refine they may refine	I may be refining you may be refining he may be refining we may be refining you may be refining they may be refining
Perfect	V-ing perfect
I may have refined you may have refined he may have refined we may have refined you may have refined they may have refined	I may have been refining you may have been refining he may have been refining we may have been refining you may have been refining they may have been refining

Negation

Simple form	V-ing form
I may not refine you may not refine he may not refine we may not refine you may not refine they may not refine	I may not be refining you may not be refining he may not be refining we may not be refining you may not be refining they may not be refining
Perfect	V-ing perfect
I may not have refined you may not have refined he may not have refined we may not have refined you may not have refined they may not have refined	I may not have been refining you may not have been refining he may not have been refining we may not have been refining you may not have been refining they may not have been refining

Interrogative form

Simple form	V-ing form
may I refine? may you refine? may he refine? may we refine? may you refine? may they refine?	may I be refining? may you be refining? may he be refining? may we be refining? may you be refining? may they be refining?
Perfect	V-ing perfect
may I have refined? may you have refined? may he have refined? may we have refined? may you have refined? may they have refined?	may I have been refining? may you have been refining? may he have been refining? may we have been refining? may you have been refining? may they have been refining?

Interro-negative form

Simple form	V-ing form
may I not refine? may you not refine? may he not refine? may we not refine? may you not refine? may they not refine?	may I not be refining? may you not be refining? may he not be refining? may we not be refining? may you not be refining? may they not be refining?
Perfect	V-ing perfect
may I not have refined? may you not have refined? may he not have refined? may we not have refined? may you not have refined? may they not have refined?	may I not have been refining? may you not have been refining? may he not have been refining? may we not have been refining? may you not have been refining? may they not have been refining?