English verb conjugation
MUST PETRIFY

Regular verb: petrify - petrified - petrified

Affirmation

Simple form	V-ing form
I must petrify you must petrify he must petrify we must petrify you must petrify they must petrify	I must be petrifying you must be petrifying he must be petrifying we must be petrifying you must be petrifying they must be petrifying
Perfect	V-ing perfect
I must have petrified you must have petrified he must have petrified we must have petrified you must have petrified they must have petrified	I must have been petrifying you must have been petrifying he must have been petrifying we must have been petrifying you must have been petrifying they must have been petrifying

Negation

Simple form	V-ing form
I must not petrify you must not petrify he must not petrify we must not petrify you must not petrify they must not petrify	I must not be petrifying you must not be petrifying he must not be petrifying we must not be petrifying you must not be petrifying they must not be petrifying
Perfect	V-ing perfect
I must not have petrified you must not have petrified he must not have petrified we must not have petrified you must not have petrified they must not have petrified	I must not have been petrifying you must not have been petrifying he must not have been petrifying we must not have been petrifying you must not have been petrifying they must not have been petrifying

Interrogative form

Simple form	V-ing form
must I petrify? must you petrify? must he petrify? must we petrify? must you petrify? must they petrify?	must I be petrifying? must you be petrifying? must he be petrifying? must we be petrifying? must you be petrifying? must they be petrifying?
Perfect	V-ing perfect
must I have petrified? must you have petrified? must he have petrified? must we have petrified? must you have petrified? must they have petrified?	must I have been petrifying? must you have been petrifying? must he have been petrifying? must we have been petrifying? must you have been petrifying? must they have been petrifying?

Interro-negative form

Simple form	V-ing form
must I not petrify? must you not petrify? must he not petrify? must we not petrify? must you not petrify? must they not petrify?	must I not be petrifying? must you not be petrifying? must he not be petrifying? must we not be petrifying? must you not be petrifying? must they not be petrifying?
Perfect	V-ing perfect
must I not have petrified? must you not have petrified? must he not have petrified? must we not have petrified? must you not have petrified? must they not have petrified?	must I not have been petrifying? must you not have been petrifying? must he not have been petrifying? must we not have been petrifying? must you not have been petrifying? must they not have been petrifying?