English verb conjugation
MUST OCCUPY

Regular verb: occupy - occupied - occupied

Affirmation

Simple form	V-ing form
I must occupy you must occupy he must occupy we must occupy you must occupy they must occupy	I must be occupying you must be occupying he must be occupying we must be occupying you must be occupying they must be occupying
Perfect	V-ing perfect
I must have occupied you must have occupied he must have occupied we must have occupied you must have occupied they must have occupied	I must have been occupying you must have been occupying he must have been occupying we must have been occupying you must have been occupying they must have been occupying

Negation

Simple form	V-ing form
I must not occupy you must not occupy he must not occupy we must not occupy you must not occupy they must not occupy	I must not be occupying you must not be occupying he must not be occupying we must not be occupying you must not be occupying they must not be occupying
Perfect	V-ing perfect
I must not have occupied you must not have occupied he must not have occupied we must not have occupied you must not have occupied they must not have occupied	I must not have been occupying you must not have been occupying he must not have been occupying we must not have been occupying you must not have been occupying they must not have been occupying

Interrogative form

Simple form	V-ing form
must I occupy? must you occupy? must he occupy? must we occupy? must you occupy? must they occupy?	must I be occupying? must you be occupying? must he be occupying? must we be occupying? must you be occupying? must they be occupying?
Perfect	V-ing perfect
must I have occupied? must you have occupied? must he have occupied? must we have occupied? must you have occupied? must they have occupied?	must I have been occupying? must you have been occupying? must he have been occupying? must we have been occupying? must you have been occupying? must they have been occupying?

Interro-negative form

Simple form	V-ing form
must I not occupy? must you not occupy? must he not occupy? must we not occupy? must you not occupy? must they not occupy?	must I not be occupying? must you not be occupying? must he not be occupying? must we not be occupying? must you not be occupying? must they not be occupying?
Perfect	V-ing perfect
must I not have occupied? must you not have occupied? must he not have occupied? must we not have occupied? must you not have occupied? must they not have occupied?	must I not have been occupying? must you not have been occupying? must he not have been occupying? must we not have been occupying? must you not have been occupying? must they not have been occupying?