English verb conjugation
MUST VANISH

Regular verb: vanish - vanished - vanished

Affirmation

Simple form	V-ing form
I must vanish you must vanish he must vanish we must vanish you must vanish they must vanish	I must be vanishing you must be vanishing he must be vanishing we must be vanishing you must be vanishing they must be vanishing
Perfect	V-ing perfect
I must have vanished you must have vanished he must have vanished we must have vanished you must have vanished they must have vanished	I must have been vanishing you must have been vanishing he must have been vanishing we must have been vanishing you must have been vanishing they must have been vanishing

Negation

Simple form	V-ing form
I mustn't vanish you mustn't vanish he mustn't vanish we mustn't vanish you mustn't vanish they mustn't vanish	I mustn't be vanishing you mustn't be vanishing he mustn't be vanishing we mustn't be vanishing you mustn't be vanishing they mustn't be vanishing
Perfect	V-ing perfect
I mustn't have vanished you mustn't have vanished he mustn't have vanished we mustn't have vanished you mustn't have vanished they mustn't have vanished	I mustn't have been vanishing you mustn't have been vanishing he mustn't have been vanishing we mustn't have been vanishing you mustn't have been vanishing they mustn't have been vanishing

Interrogative form

Simple form	V-ing form
must I vanish? must you vanish? must he vanish? must we vanish? must you vanish? must they vanish?	must I be vanishing? must you be vanishing? must he be vanishing? must we be vanishing? must you be vanishing? must they be vanishing?
Perfect	V-ing perfect
must I have vanished? must you have vanished? must he have vanished? must we have vanished? must you have vanished? must they have vanished?	must I have been vanishing? must you have been vanishing? must he have been vanishing? must we have been vanishing? must you have been vanishing? must they have been vanishing?

Interro-negative form

Simple form	V-ing form
mustn't I vanish? mustn't you vanish? mustn't he vanish? mustn't we vanish? mustn't you vanish? mustn't they vanish?	mustn't I be vanishing? mustn't you be vanishing? mustn't he be vanishing? mustn't we be vanishing? mustn't you be vanishing? mustn't they be vanishing?
Perfect	V-ing perfect
mustn't I have vanished? mustn't you have vanished? mustn't he have vanished? mustn't we have vanished? mustn't you have vanished? mustn't they have vanished?	mustn't I have been vanishing? mustn't you have been vanishing? mustn't he have been vanishing? mustn't we have been vanishing? mustn't you have been vanishing? mustn't they have been vanishing?