English verb conjugation
MAY REF

Regular verb: ref - refed - refed

Affirmation

Simple form	V-ing form
I may ref you may ref she may ref we may ref you may ref they may ref	I may be refing you may be refing she may be refing we may be refing you may be refing they may be refing
Perfect	V-ing perfect
I may have refed you may have refed she may have refed we may have refed you may have refed they may have refed	I may have been refing you may have been refing she may have been refing we may have been refing you may have been refing they may have been refing

Negation

Simple form	V-ing form
I mayn't ref you mayn't ref she mayn't ref we mayn't ref you mayn't ref they mayn't ref	I mayn't be refing you mayn't be refing she mayn't be refing we mayn't be refing you mayn't be refing they mayn't be refing
Perfect	V-ing perfect
I mayn't have refed you mayn't have refed she mayn't have refed we mayn't have refed you mayn't have refed they mayn't have refed	I mayn't have been refing you mayn't have been refing she mayn't have been refing we mayn't have been refing you mayn't have been refing they mayn't have been refing

Interrogative form

Simple form	V-ing form
may I ref? may you ref? may she ref? may we ref? may you ref? may they ref?	may I be refing? may you be refing? may she be refing? may we be refing? may you be refing? may they be refing?
Perfect	V-ing perfect
may I have refed? may you have refed? may she have refed? may we have refed? may you have refed? may they have refed?	may I have been refing? may you have been refing? may she have been refing? may we have been refing? may you have been refing? may they have been refing?

Interro-negative form

Simple form	V-ing form
mayn't I ref? mayn't you ref? mayn't she ref? mayn't we ref? mayn't you ref? mayn't they ref?	mayn't I be refing? mayn't you be refing? mayn't she be refing? mayn't we be refing? mayn't you be refing? mayn't they be refing?
Perfect	V-ing perfect
mayn't I have refed? mayn't you have refed? mayn't she have refed? mayn't we have refed? mayn't you have refed? mayn't they have refed?	mayn't I have been refing? mayn't you have been refing? mayn't she have been refing? mayn't we have been refing? mayn't you have been refing? mayn't they have been refing?