English verb conjugation
MAY EXIST

Regular verb: exist - existed - existed

Affirmation

Simple form	V-ing form
I may exist you may exist she may exist we may exist you may exist they may exist	I may be existing you may be existing she may be existing we may be existing you may be existing they may be existing
Perfect	V-ing perfect
I may have existed you may have existed she may have existed we may have existed you may have existed they may have existed	I may have been existing you may have been existing she may have been existing we may have been existing you may have been existing they may have been existing

Negation

Simple form	V-ing form
I mayn't exist you mayn't exist she mayn't exist we mayn't exist you mayn't exist they mayn't exist	I mayn't be existing you mayn't be existing she mayn't be existing we mayn't be existing you mayn't be existing they mayn't be existing
Perfect	V-ing perfect
I mayn't have existed you mayn't have existed she mayn't have existed we mayn't have existed you mayn't have existed they mayn't have existed	I mayn't have been existing you mayn't have been existing she mayn't have been existing we mayn't have been existing you mayn't have been existing they mayn't have been existing

Interrogative form

Simple form	V-ing form
may I exist? may you exist? may she exist? may we exist? may you exist? may they exist?	may I be existing? may you be existing? may she be existing? may we be existing? may you be existing? may they be existing?
Perfect	V-ing perfect
may I have existed? may you have existed? may she have existed? may we have existed? may you have existed? may they have existed?	may I have been existing? may you have been existing? may she have been existing? may we have been existing? may you have been existing? may they have been existing?

Interro-negative form

Simple form	V-ing form
mayn't I exist? mayn't you exist? mayn't she exist? mayn't we exist? mayn't you exist? mayn't they exist?	mayn't I be existing? mayn't you be existing? mayn't she be existing? mayn't we be existing? mayn't you be existing? mayn't they be existing?
Perfect	V-ing perfect
mayn't I have existed? mayn't you have existed? mayn't she have existed? mayn't we have existed? mayn't you have existed? mayn't they have existed?	mayn't I have been existing? mayn't you have been existing? mayn't she have been existing? mayn't we have been existing? mayn't you have been existing? mayn't they have been existing?