English verb conjugation
MAY EXIST

Regular verb: exist - existed - existed

Affirmation

Simple form	V-ing form
I may exist you may exist he may exist we may exist you may exist they may exist	I may be existing you may be existing he 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 he 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 he 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 he 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 he 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 he 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 he 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 he exist? may we exist? may you exist? may they exist?	may I be existing? may you be existing? may he 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 he 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 he 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 he 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 he 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 he 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 he have been existing? mayn't we have been existing? mayn't you have been existing? mayn't they have been existing?