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 mayn't refine you mayn't refine he mayn't refine we mayn't refine you mayn't refine they mayn't refine	I mayn't be refining you mayn't be refining he mayn't be refining we mayn't be refining you mayn't be refining they mayn't be refining
Perfect	V-ing perfect
I mayn't have refined you mayn't have refined he mayn't have refined we mayn't have refined you mayn't have refined they mayn't have refined	I mayn't have been refining you mayn't have been refining he mayn't have been refining we mayn't have been refining you mayn't have been refining they mayn't 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
mayn't I refine? mayn't you refine? mayn't he refine? mayn't we refine? mayn't you refine? mayn't they refine?	mayn't I be refining? mayn't you be refining? mayn't he be refining? mayn't we be refining? mayn't you be refining? mayn't they be refining?
Perfect	V-ing perfect
mayn't I have refined? mayn't you have refined? mayn't he have refined? mayn't we have refined? mayn't you have refined? mayn't they have refined?	mayn't I have been refining? mayn't you have been refining? mayn't he have been refining? mayn't we have been refining? mayn't you have been refining? mayn't they have been refining?