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