I may refute you may refute she may refute we may refute you may refute they may refute
V-ing form
I may be refuting you may be refuting she may be refuting we may be refuting you may be refuting they may be refuting
Perfect
I may have refuted you may have refuted she may have refuted we may have refuted you may have refuted they may have refuted
V-ing perfect
I may have been refuting you may have been refuting she may have been refuting we may have been refuting you may have been refuting they may have been refuting
Negation
Simple form
I mayn't refute you mayn't refute she mayn't refute we mayn't refute you mayn't refute they mayn't refute
V-ing form
I mayn't be refuting you mayn't be refuting she mayn't be refuting we mayn't be refuting you mayn't be refuting they mayn't be refuting
Perfect
I mayn't have refuted you mayn't have refuted she mayn't have refuted we mayn't have refuted you mayn't have refuted they mayn't have refuted
V-ing perfect
I mayn't have been refuting you mayn't have been refuting she mayn't have been refuting we mayn't have been refuting you mayn't have been refuting they mayn't have been refuting
Interrogative form
Simple form
may I refute? may you refute? may she refute? may we refute? may you refute? may they refute?
V-ing form
may I be refuting? may you be refuting? may she be refuting? may we be refuting? may you be refuting? may they be refuting?
Perfect
may I have refuted? may you have refuted? may she have refuted? may we have refuted? may you have refuted? may they have refuted?
V-ing perfect
may I have been refuting? may you have been refuting? may she have been refuting? may we have been refuting? may you have been refuting? may they have been refuting?
Interro-negative form
Simple form
mayn't I refute? mayn't you refute? mayn't she refute? mayn't we refute? mayn't you refute? mayn't they refute?
V-ing form
mayn't I be refuting? mayn't you be refuting? mayn't she be refuting? mayn't we be refuting? mayn't you be refuting? mayn't they be refuting?
Perfect
mayn't I have refuted? mayn't you have refuted? mayn't she have refuted? mayn't we have refuted? mayn't you have refuted? mayn't they have refuted?
V-ing perfect
mayn't I have been refuting? mayn't you have been refuting? mayn't she have been refuting? mayn't we have been refuting? mayn't you have been refuting? mayn't they have been refuting?