English verb conjugation
MUST INFORM

Regular verb: inform - informed - informed

Affirmation

Simple form	V-ing form
I must inform you must inform he must inform we must inform you must inform they must inform	I must be informing you must be informing he must be informing we must be informing you must be informing they must be informing
Perfect	V-ing perfect
I must have informed you must have informed he must have informed we must have informed you must have informed they must have informed	I must have been informing you must have been informing he must have been informing we must have been informing you must have been informing they must have been informing

Negation

Simple form	V-ing form
I mustn't inform you mustn't inform he mustn't inform we mustn't inform you mustn't inform they mustn't inform	I mustn't be informing you mustn't be informing he mustn't be informing we mustn't be informing you mustn't be informing they mustn't be informing
Perfect	V-ing perfect
I mustn't have informed you mustn't have informed he mustn't have informed we mustn't have informed you mustn't have informed they mustn't have informed	I mustn't have been informing you mustn't have been informing he mustn't have been informing we mustn't have been informing you mustn't have been informing they mustn't have been informing

Interrogative form

Simple form	V-ing form
must I inform? must you inform? must he inform? must we inform? must you inform? must they inform?	must I be informing? must you be informing? must he be informing? must we be informing? must you be informing? must they be informing?
Perfect	V-ing perfect
must I have informed? must you have informed? must he have informed? must we have informed? must you have informed? must they have informed?	must I have been informing? must you have been informing? must he have been informing? must we have been informing? must you have been informing? must they have been informing?

Interro-negative form

Simple form	V-ing form
mustn't I inform? mustn't you inform? mustn't he inform? mustn't we inform? mustn't you inform? mustn't they inform?	mustn't I be informing? mustn't you be informing? mustn't he be informing? mustn't we be informing? mustn't you be informing? mustn't they be informing?
Perfect	V-ing perfect
mustn't I have informed? mustn't you have informed? mustn't he have informed? mustn't we have informed? mustn't you have informed? mustn't they have informed?	mustn't I have been informing? mustn't you have been informing? mustn't he have been informing? mustn't we have been informing? mustn't you have been informing? mustn't they have been informing?