English verb conjugation
MUST OSSIFY

Regular verb: ossify - ossified - ossified

Affirmation

Simple form	V-ing form
I must ossify you must ossify he must ossify we must ossify you must ossify they must ossify	I must be ossifying you must be ossifying he must be ossifying we must be ossifying you must be ossifying they must be ossifying
Perfect	V-ing perfect
I must have ossified you must have ossified he must have ossified we must have ossified you must have ossified they must have ossified	I must have been ossifying you must have been ossifying he must have been ossifying we must have been ossifying you must have been ossifying they must have been ossifying

Negation

Simple form	V-ing form
I mustn't ossify you mustn't ossify he mustn't ossify we mustn't ossify you mustn't ossify they mustn't ossify	I mustn't be ossifying you mustn't be ossifying he mustn't be ossifying we mustn't be ossifying you mustn't be ossifying they mustn't be ossifying
Perfect	V-ing perfect
I mustn't have ossified you mustn't have ossified he mustn't have ossified we mustn't have ossified you mustn't have ossified they mustn't have ossified	I mustn't have been ossifying you mustn't have been ossifying he mustn't have been ossifying we mustn't have been ossifying you mustn't have been ossifying they mustn't have been ossifying

Interrogative form

Simple form	V-ing form
must I ossify? must you ossify? must he ossify? must we ossify? must you ossify? must they ossify?	must I be ossifying? must you be ossifying? must he be ossifying? must we be ossifying? must you be ossifying? must they be ossifying?
Perfect	V-ing perfect
must I have ossified? must you have ossified? must he have ossified? must we have ossified? must you have ossified? must they have ossified?	must I have been ossifying? must you have been ossifying? must he have been ossifying? must we have been ossifying? must you have been ossifying? must they have been ossifying?

Interro-negative form

Simple form	V-ing form
mustn't I ossify? mustn't you ossify? mustn't he ossify? mustn't we ossify? mustn't you ossify? mustn't they ossify?	mustn't I be ossifying? mustn't you be ossifying? mustn't he be ossifying? mustn't we be ossifying? mustn't you be ossifying? mustn't they be ossifying?
Perfect	V-ing perfect
mustn't I have ossified? mustn't you have ossified? mustn't he have ossified? mustn't we have ossified? mustn't you have ossified? mustn't they have ossified?	mustn't I have been ossifying? mustn't you have been ossifying? mustn't he have been ossifying? mustn't we have been ossifying? mustn't you have been ossifying? mustn't they have been ossifying?