may subsist
Regular verb: subsist - subsisted- subsisted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may subsist
you may subsist
she may subsist
we may subsist
you may subsist
they may subsist 	I may be subsisting
you may be subsisting
she may be subsisting
we may be subsisting
you may be subsisting
they may be subsisting	I may have subsisted
you may have subsisted
she may have subsisted
we may have subsisted
you may have subsisted
they may have subsisted	I may have been subsisting
you may have been subsisting
she may have been subsisting
we may have been subsisting
you may have been subsisting
they may have been subsisting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't subsist
you mayn't subsist
she mayn't subsist
we mayn't subsist
you mayn't subsist
they mayn't subsist 	I mayn't be subsisting
you mayn't be subsisting
she mayn't be subsisting
we mayn't be subsisting
you mayn't be subsisting
they mayn't be subsisting	I mayn't have subsisted
you mayn't have subsisted
she mayn't have subsisted
we mayn't have subsisted
you mayn't have subsisted
they mayn't have subsisted	I mayn't have been subsisting
you mayn't have been subsisting
she mayn't have been subsisting
we mayn't have been subsisting
you mayn't have been subsisting
they mayn't have been subsisting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I subsist?
may you subsist?
may she subsist?
may we subsist?
may you subsist?
may they subsist? 	may I be subsisting?
may you be subsisting?
may she be subsisting?
may we be subsisting?
may you be subsisting?
may they be subsisting? 	may I have subsisted?
may you have subsisted?
may she have subsisted?
may we have subsisted?
may you have subsisted?
may they have subsisted? 	may I have been subsisting?
may you have been subsisting?
may she have been subsisting?
may we have been subsisting?
may you have been subsisting?
may they have been subsisting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I subsist?
mayn't you subsist?
mayn't she subsist?
mayn't we subsist?
mayn't you subsist?
mayn't they subsist? 	mayn't I be subsisting?
mayn't you be subsisting?
mayn't she be subsisting?
mayn't we be subsisting?
mayn't you be subsisting?
mayn't they be subsisting? 	mayn't I have subsisted?
mayn't you have subsisted?
mayn't she have subsisted?
mayn't we have subsisted?
mayn't you have subsisted?
mayn't they have subsisted? 	mayn't I have been subsisting?
mayn't you have been subsisting?
mayn't she have been subsisting?
mayn't we have been subsisting?
mayn't you have been subsisting?
mayn't they have been subsisting?