English verb conjugation
MUST PREINFORM

Regular verb: preinform - preinformed - preinformed

Affirmation

Simple form	V-ing form
I must preinform you must preinform he must preinform we must preinform you must preinform they must preinform	I must be preinforming you must be preinforming he must be preinforming we must be preinforming you must be preinforming they must be preinforming
Perfect	V-ing perfect
I must have preinformed you must have preinformed he must have preinformed we must have preinformed you must have preinformed they must have preinformed	I must have been preinforming you must have been preinforming he must have been preinforming we must have been preinforming you must have been preinforming they must have been preinforming

Negation

Simple form	V-ing form
I mustn't preinform you mustn't preinform he mustn't preinform we mustn't preinform you mustn't preinform they mustn't preinform	I mustn't be preinforming you mustn't be preinforming he mustn't be preinforming we mustn't be preinforming you mustn't be preinforming they mustn't be preinforming
Perfect	V-ing perfect
I mustn't have preinformed you mustn't have preinformed he mustn't have preinformed we mustn't have preinformed you mustn't have preinformed they mustn't have preinformed	I mustn't have been preinforming you mustn't have been preinforming he mustn't have been preinforming we mustn't have been preinforming you mustn't have been preinforming they mustn't have been preinforming

Interrogative form

Simple form	V-ing form
must I preinform? must you preinform? must he preinform? must we preinform? must you preinform? must they preinform?	must I be preinforming? must you be preinforming? must he be preinforming? must we be preinforming? must you be preinforming? must they be preinforming?
Perfect	V-ing perfect
must I have preinformed? must you have preinformed? must he have preinformed? must we have preinformed? must you have preinformed? must they have preinformed?	must I have been preinforming? must you have been preinforming? must he have been preinforming? must we have been preinforming? must you have been preinforming? must they have been preinforming?

Interro-negative form

Simple form	V-ing form
mustn't I preinform? mustn't you preinform? mustn't he preinform? mustn't we preinform? mustn't you preinform? mustn't they preinform?	mustn't I be preinforming? mustn't you be preinforming? mustn't he be preinforming? mustn't we be preinforming? mustn't you be preinforming? mustn't they be preinforming?
Perfect	V-ing perfect
mustn't I have preinformed? mustn't you have preinformed? mustn't he have preinformed? mustn't we have preinformed? mustn't you have preinformed? mustn't they have preinformed?	mustn't I have been preinforming? mustn't you have been preinforming? mustn't he have been preinforming? mustn't we have been preinforming? mustn't you have been preinforming? mustn't they have been preinforming?