must lithify
Regular verb: lithify - lithified- lithified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must lithify
you must lithify
he must lithify
we must lithify
you must lithify
they must lithify 	I must be lithifying
you must be lithifying
he must be lithifying
we must be lithifying
you must be lithifying
they must be lithifying	I must have lithified
you must have lithified
he must have lithified
we must have lithified
you must have lithified
they must have lithified	I must have been lithifying
you must have been lithifying
he must have been lithifying
we must have been lithifying
you must have been lithifying
they must have been lithifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't lithify
you mustn't lithify
he mustn't lithify
we mustn't lithify
you mustn't lithify
they mustn't lithify 	I mustn't be lithifying
you mustn't be lithifying
he mustn't be lithifying
we mustn't be lithifying
you mustn't be lithifying
they mustn't be lithifying	I mustn't have lithified
you mustn't have lithified
he mustn't have lithified
we mustn't have lithified
you mustn't have lithified
they mustn't have lithified	I mustn't have been lithifying
you mustn't have been lithifying
he mustn't have been lithifying
we mustn't have been lithifying
you mustn't have been lithifying
they mustn't have been lithifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I lithify?
must you lithify?
must he lithify?
must we lithify?
must you lithify?
must they lithify? 	must I be lithifying?
must you be lithifying?
must he be lithifying?
must we be lithifying?
must you be lithifying?
must they be lithifying? 	must I have lithified?
must you have lithified?
must he have lithified?
must we have lithified?
must you have lithified?
must they have lithified? 	must I have been lithifying?
must you have been lithifying?
must he have been lithifying?
must we have been lithifying?
must you have been lithifying?
must they have been lithifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I lithify?
mustn't you lithify?
mustn't he lithify?
mustn't we lithify?
mustn't you lithify?
mustn't they lithify? 	mustn't I be lithifying?
mustn't you be lithifying?
mustn't he be lithifying?
mustn't we be lithifying?
mustn't you be lithifying?
mustn't they be lithifying? 	mustn't I have lithified?
mustn't you have lithified?
mustn't he have lithified?
mustn't we have lithified?
mustn't you have lithified?
mustn't they have lithified? 	mustn't I have been lithifying?
mustn't you have been lithifying?
mustn't he have been lithifying?
mustn't we have been lithifying?
mustn't you have been lithifying?
mustn't they have been lithifying?