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 mustn't petrify you mustn't petrify he mustn't petrify we mustn't petrify you mustn't petrify they mustn't petrify	I mustn't be petrifying you mustn't be petrifying he mustn't be petrifying we mustn't be petrifying you mustn't be petrifying they mustn't be petrifying
Perfect	V-ing perfect
I mustn't have petrified you mustn't have petrified he mustn't have petrified we mustn't have petrified you mustn't have petrified they mustn't have petrified	I mustn't have been petrifying you mustn't have been petrifying he mustn't have been petrifying we mustn't have been petrifying you mustn't have been petrifying they mustn't 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
mustn't I petrify? mustn't you petrify? mustn't he petrify? mustn't we petrify? mustn't you petrify? mustn't they petrify?	mustn't I be petrifying? mustn't you be petrifying? mustn't he be petrifying? mustn't we be petrifying? mustn't you be petrifying? mustn't they be petrifying?
Perfect	V-ing perfect
mustn't I have petrified? mustn't you have petrified? mustn't he have petrified? mustn't we have petrified? mustn't you have petrified? mustn't they have petrified?	mustn't I have been petrifying? mustn't you have been petrifying? mustn't he have been petrifying? mustn't we have been petrifying? mustn't you have been petrifying? mustn't they have been petrifying?