must prevalue
Regular verb: prevalue - prevalued- prevalued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prevalue
you must prevalue
she must prevalue
we must prevalue
you must prevalue
they must prevalue 	I must be prevaluing
you must be prevaluing
she must be prevaluing
we must be prevaluing
you must be prevaluing
they must be prevaluing	I must have prevalued
you must have prevalued
she must have prevalued
we must have prevalued
you must have prevalued
they must have prevalued	I must have been prevaluing
you must have been prevaluing
she must have been prevaluing
we must have been prevaluing
you must have been prevaluing
they must have been prevaluing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prevalue
you mustn't prevalue
she mustn't prevalue
we mustn't prevalue
you mustn't prevalue
they mustn't prevalue 	I mustn't be prevaluing
you mustn't be prevaluing
she mustn't be prevaluing
we mustn't be prevaluing
you mustn't be prevaluing
they mustn't be prevaluing	I mustn't have prevalued
you mustn't have prevalued
she mustn't have prevalued
we mustn't have prevalued
you mustn't have prevalued
they mustn't have prevalued	I mustn't have been prevaluing
you mustn't have been prevaluing
she mustn't have been prevaluing
we mustn't have been prevaluing
you mustn't have been prevaluing
they mustn't have been prevaluing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prevalue?
must you prevalue?
must she prevalue?
must we prevalue?
must you prevalue?
must they prevalue? 	must I be prevaluing?
must you be prevaluing?
must she be prevaluing?
must we be prevaluing?
must you be prevaluing?
must they be prevaluing? 	must I have prevalued?
must you have prevalued?
must she have prevalued?
must we have prevalued?
must you have prevalued?
must they have prevalued? 	must I have been prevaluing?
must you have been prevaluing?
must she have been prevaluing?
must we have been prevaluing?
must you have been prevaluing?
must they have been prevaluing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prevalue?
mustn't you prevalue?
mustn't she prevalue?
mustn't we prevalue?
mustn't you prevalue?
mustn't they prevalue? 	mustn't I be prevaluing?
mustn't you be prevaluing?
mustn't she be prevaluing?
mustn't we be prevaluing?
mustn't you be prevaluing?
mustn't they be prevaluing? 	mustn't I have prevalued?
mustn't you have prevalued?
mustn't she have prevalued?
mustn't we have prevalued?
mustn't you have prevalued?
mustn't they have prevalued? 	mustn't I have been prevaluing?
mustn't you have been prevaluing?
mustn't she have been prevaluing?
mustn't we have been prevaluing?
mustn't you have been prevaluing?
mustn't they have been prevaluing?