must preacquaint
Regular verb: preacquaint - preacquainted- preacquainted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must preacquaint
you must preacquaint
she must preacquaint
we must preacquaint
you must preacquaint
they must preacquaint 	I must be preacquainting
you must be preacquainting
she must be preacquainting
we must be preacquainting
you must be preacquainting
they must be preacquainting	I must have preacquainted
you must have preacquainted
she must have preacquainted
we must have preacquainted
you must have preacquainted
they must have preacquainted	I must have been preacquainting
you must have been preacquainting
she must have been preacquainting
we must have been preacquainting
you must have been preacquainting
they must have been preacquainting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not preacquaint
you must not preacquaint
she must not preacquaint
we must not preacquaint
you must not preacquaint
they must not preacquaint 	I must not be preacquainting
you must not be preacquainting
she must not be preacquainting
we must not be preacquainting
you must not be preacquainting
they must not be preacquainting	I must not have preacquainted
you must not have preacquainted
she must not have preacquainted
we must not have preacquainted
you must not have preacquainted
they must not have preacquainted	I must not have been preacquainting
you must not have been preacquainting
she must not have been preacquainting
we must not have been preacquainting
you must not have been preacquainting
they must not have been preacquainting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I preacquaint?
must you preacquaint?
must she preacquaint?
must we preacquaint?
must you preacquaint?
must they preacquaint? 	must I be preacquainting?
must you be preacquainting?
must she be preacquainting?
must we be preacquainting?
must you be preacquainting?
must they be preacquainting? 	must I have preacquainted?
must you have preacquainted?
must she have preacquainted?
must we have preacquainted?
must you have preacquainted?
must they have preacquainted? 	must I have been preacquainting?
must you have been preacquainting?
must she have been preacquainting?
must we have been preacquainting?
must you have been preacquainting?
must they have been preacquainting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not preacquaint?
must you not preacquaint?
must she not preacquaint?
must we not preacquaint?
must you not preacquaint?
must they not preacquaint? 	must I not be preacquainting?
must you not be preacquainting?
must she not be preacquainting?
must we not be preacquainting?
must you not be preacquainting?
must they not be preacquainting? 	must I not have preacquainted?
must you not have preacquainted?
must she not have preacquainted?
must we not have preacquainted?
must you not have preacquainted?
must they not have preacquainted? 	must I not have been preacquainting?
must you not have been preacquainting?
must she not have been preacquainting?
must we not have been preacquainting?
must you not have been preacquainting?
must they not have been preacquainting?