English verb conjugation
MUST SUBSIST

Regular verb: subsist - subsisted - subsisted

Affirmation

Simple form	V-ing form
I must subsist you must subsist he must subsist we must subsist you must subsist they must subsist	I must be subsisting you must be subsisting he must be subsisting we must be subsisting you must be subsisting they must be subsisting
Perfect	V-ing perfect
I must have subsisted you must have subsisted he must have subsisted we must have subsisted you must have subsisted they must have subsisted	I must have been subsisting you must have been subsisting he must have been subsisting we must have been subsisting you must have been subsisting they must have been subsisting

Negation

Simple form	V-ing form
I mustn't subsist you mustn't subsist he mustn't subsist we mustn't subsist you mustn't subsist they mustn't subsist	I mustn't be subsisting you mustn't be subsisting he mustn't be subsisting we mustn't be subsisting you mustn't be subsisting they mustn't be subsisting
Perfect	V-ing perfect
I mustn't have subsisted you mustn't have subsisted he mustn't have subsisted we mustn't have subsisted you mustn't have subsisted they mustn't have subsisted	I mustn't have been subsisting you mustn't have been subsisting he mustn't have been subsisting we mustn't have been subsisting you mustn't have been subsisting they mustn't have been subsisting

Interrogative form

Simple form	V-ing form
must I subsist? must you subsist? must he subsist? must we subsist? must you subsist? must they subsist?	must I be subsisting? must you be subsisting? must he be subsisting? must we be subsisting? must you be subsisting? must they be subsisting?
Perfect	V-ing perfect
must I have subsisted? must you have subsisted? must he have subsisted? must we have subsisted? must you have subsisted? must they have subsisted?	must I have been subsisting? must you have been subsisting? must he have been subsisting? must we have been subsisting? must you have been subsisting? must they have been subsisting?

Interro-negative form

Simple form	V-ing form
mustn't I subsist? mustn't you subsist? mustn't he subsist? mustn't we subsist? mustn't you subsist? mustn't they subsist?	mustn't I be subsisting? mustn't you be subsisting? mustn't he be subsisting? mustn't we be subsisting? mustn't you be subsisting? mustn't they be subsisting?
Perfect	V-ing perfect
mustn't I have subsisted? mustn't you have subsisted? mustn't he have subsisted? mustn't we have subsisted? mustn't you have subsisted? mustn't they have subsisted?	mustn't I have been subsisting? mustn't you have been subsisting? mustn't he have been subsisting? mustn't we have been subsisting? mustn't you have been subsisting? mustn't they have been subsisting?