English verb conjugation
MUST INFORM

Regular verb: inform - informed - informed

Affirmation

Simple form	V-ing form
I must inform you must inform she must inform we must inform you must inform they must inform	I must be informing you must be informing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she inform? must we inform? must you inform? must they inform?	must I be informing? must you be informing? must she 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 she 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 she 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 she 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 she 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 she 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 she have been informing? mustn't we have been informing? mustn't you have been informing? mustn't they have been informing?