must retestify
Regular verb: retestify - retestified- retestified

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must retestify
you must retestify
he must retestify
we must retestify
you must retestify
they must retestify 	I must be retestifying
you must be retestifying
he must be retestifying
we must be retestifying
you must be retestifying
they must be retestifying	I must have retestified
you must have retestified
he must have retestified
we must have retestified
you must have retestified
they must have retestified	I must have been retestifying
you must have been retestifying
he must have been retestifying
we must have been retestifying
you must have been retestifying
they must have been retestifying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't retestify
you mustn't retestify
he mustn't retestify
we mustn't retestify
you mustn't retestify
they mustn't retestify 	I mustn't be retestifying
you mustn't be retestifying
he mustn't be retestifying
we mustn't be retestifying
you mustn't be retestifying
they mustn't be retestifying	I mustn't have retestified
you mustn't have retestified
he mustn't have retestified
we mustn't have retestified
you mustn't have retestified
they mustn't have retestified	I mustn't have been retestifying
you mustn't have been retestifying
he mustn't have been retestifying
we mustn't have been retestifying
you mustn't have been retestifying
they mustn't have been retestifying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I retestify?
must you retestify?
must he retestify?
must we retestify?
must you retestify?
must they retestify? 	must I be retestifying?
must you be retestifying?
must he be retestifying?
must we be retestifying?
must you be retestifying?
must they be retestifying? 	must I have retestified?
must you have retestified?
must he have retestified?
must we have retestified?
must you have retestified?
must they have retestified? 	must I have been retestifying?
must you have been retestifying?
must he have been retestifying?
must we have been retestifying?
must you have been retestifying?
must they have been retestifying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I retestify?
mustn't you retestify?
mustn't he retestify?
mustn't we retestify?
mustn't you retestify?
mustn't they retestify? 	mustn't I be retestifying?
mustn't you be retestifying?
mustn't he be retestifying?
mustn't we be retestifying?
mustn't you be retestifying?
mustn't they be retestifying? 	mustn't I have retestified?
mustn't you have retestified?
mustn't he have retestified?
mustn't we have retestified?
mustn't you have retestified?
mustn't they have retestified? 	mustn't I have been retestifying?
mustn't you have been retestifying?
mustn't he have been retestifying?
mustn't we have been retestifying?
mustn't you have been retestifying?
mustn't they have been retestifying?