English verb conjugation
MUST PREINVESTIGATE PREINVESTIGATE

Regular verb: preinvestigate preinvestigate - preinvestigate preinvestigated - preinvestigate preinvestigated

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I must preinvestigate preinvestigate you must preinvestigate preinvestigate he must preinvestigate preinvestigate we must preinvestigate preinvestigate you must preinvestigate preinvestigate they must preinvestigate preinvestigate	I must be preinvestigate preinvestigating you must be preinvestigate preinvestigating he must be preinvestigate preinvestigating we must be preinvestigate preinvestigating you must be preinvestigate preinvestigating they must be preinvestigate preinvestigating
Perfect	V-ing perfect
I must have preinvestigate preinvestigated you must have preinvestigate preinvestigated he must have preinvestigate preinvestigated we must have preinvestigate preinvestigated you must have preinvestigate preinvestigated they must have preinvestigate preinvestigated	I must have been preinvestigate preinvestigating you must have been preinvestigate preinvestigating he must have been preinvestigate preinvestigating we must have been preinvestigate preinvestigating you must have been preinvestigate preinvestigating they must have been preinvestigate preinvestigating

Negation

Simple form	V-ing form
I mustn't preinvestigate preinvestigate you mustn't preinvestigate preinvestigate he mustn't preinvestigate preinvestigate we mustn't preinvestigate preinvestigate you mustn't preinvestigate preinvestigate they mustn't preinvestigate preinvestigate	I mustn't be preinvestigate preinvestigating you mustn't be preinvestigate preinvestigating he mustn't be preinvestigate preinvestigating we mustn't be preinvestigate preinvestigating you mustn't be preinvestigate preinvestigating they mustn't be preinvestigate preinvestigating
Perfect	V-ing perfect
I mustn't have preinvestigate preinvestigated you mustn't have preinvestigate preinvestigated he mustn't have preinvestigate preinvestigated we mustn't have preinvestigate preinvestigated you mustn't have preinvestigate preinvestigated they mustn't have preinvestigate preinvestigated	I mustn't have been preinvestigate preinvestigating you mustn't have been preinvestigate preinvestigating he mustn't have been preinvestigate preinvestigating we mustn't have been preinvestigate preinvestigating you mustn't have been preinvestigate preinvestigating they mustn't have been preinvestigate preinvestigating

Interrogative form

Simple form	V-ing form
must I preinvestigate preinvestigate? must you preinvestigate preinvestigate? must he preinvestigate preinvestigate? must we preinvestigate preinvestigate? must you preinvestigate preinvestigate? must they preinvestigate preinvestigate?	must I be preinvestigate preinvestigating? must you be preinvestigate preinvestigating? must he be preinvestigate preinvestigating? must we be preinvestigate preinvestigating? must you be preinvestigate preinvestigating? must they be preinvestigate preinvestigating?
Perfect	V-ing perfect
must I have preinvestigate preinvestigated? must you have preinvestigate preinvestigated? must he have preinvestigate preinvestigated? must we have preinvestigate preinvestigated? must you have preinvestigate preinvestigated? must they have preinvestigate preinvestigated?	must I have been preinvestigate preinvestigating? must you have been preinvestigate preinvestigating? must he have been preinvestigate preinvestigating? must we have been preinvestigate preinvestigating? must you have been preinvestigate preinvestigating? must they have been preinvestigate preinvestigating?

Interro-negative form

Simple form	V-ing form
mustn't I preinvestigate preinvestigate? mustn't you preinvestigate preinvestigate? mustn't he preinvestigate preinvestigate? mustn't we preinvestigate preinvestigate? mustn't you preinvestigate preinvestigate? mustn't they preinvestigate preinvestigate?	mustn't I be preinvestigate preinvestigating? mustn't you be preinvestigate preinvestigating? mustn't he be preinvestigate preinvestigating? mustn't we be preinvestigate preinvestigating? mustn't you be preinvestigate preinvestigating? mustn't they be preinvestigate preinvestigating?
Perfect	V-ing perfect
mustn't I have preinvestigate preinvestigated? mustn't you have preinvestigate preinvestigated? mustn't he have preinvestigate preinvestigated? mustn't we have preinvestigate preinvestigated? mustn't you have preinvestigate preinvestigated? mustn't they have preinvestigate preinvestigated?	mustn't I have been preinvestigate preinvestigating? mustn't you have been preinvestigate preinvestigating? mustn't he have been preinvestigate preinvestigating? mustn't we have been preinvestigate preinvestigating? mustn't you have been preinvestigate preinvestigating? mustn't they have been preinvestigate preinvestigating?