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 must not preinform you must not preinform he must not preinform we must not preinform you must not preinform they must not preinform	I must not be preinforming you must not be preinforming he must not be preinforming we must not be preinforming you must not be preinforming they must not be preinforming
Perfect	V-ing perfect
I must not have preinformed you must not have preinformed he must not have preinformed we must not have preinformed you must not have preinformed they must not have preinformed	I must not have been preinforming you must not have been preinforming he must not have been preinforming we must not have been preinforming you must not have been preinforming they must not 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
must I not preinform? must you not preinform? must he not preinform? must we not preinform? must you not preinform? must they not preinform?	must I not be preinforming? must you not be preinforming? must he not be preinforming? must we not be preinforming? must you not be preinforming? must they not be preinforming?
Perfect	V-ing perfect
must I not have preinformed? must you not have preinformed? must he not have preinformed? must we not have preinformed? must you not have preinformed? must they not have preinformed?	must I not have been preinforming? must you not have been preinforming? must he not have been preinforming? must we not have been preinforming? must you not have been preinforming? must they not have been preinforming?