I must acquaint you must acquaint he must acquaint we must acquaint you must acquaint they must acquaint
V-ing form
I must be acquainting you must be acquainting he must be acquainting we must be acquainting you must be acquainting they must be acquainting
Perfect
I must have acquainted you must have acquainted he must have acquainted we must have acquainted you must have acquainted they must have acquainted
V-ing perfect
I must have been acquainting you must have been acquainting he must have been acquainting we must have been acquainting you must have been acquainting they must have been acquainting
Negation
Simple form
I must not acquaint you must not acquaint he must not acquaint we must not acquaint you must not acquaint they must not acquaint
V-ing form
I must not be acquainting you must not be acquainting he must not be acquainting we must not be acquainting you must not be acquainting they must not be acquainting
Perfect
I must not have acquainted you must not have acquainted he must not have acquainted we must not have acquainted you must not have acquainted they must not have acquainted
V-ing perfect
I must not have been acquainting you must not have been acquainting he must not have been acquainting we must not have been acquainting you must not have been acquainting they must not have been acquainting
Interrogative form
Simple form
must I acquaint? must you acquaint? must he acquaint? must we acquaint? must you acquaint? must they acquaint?
V-ing form
must I be acquainting? must you be acquainting? must he be acquainting? must we be acquainting? must you be acquainting? must they be acquainting?
Perfect
must I have acquainted? must you have acquainted? must he have acquainted? must we have acquainted? must you have acquainted? must they have acquainted?
V-ing perfect
must I have been acquainting? must you have been acquainting? must he have been acquainting? must we have been acquainting? must you have been acquainting? must they have been acquainting?
Interro-negative form
Simple form
must I not acquaint? must you not acquaint? must he not acquaint? must we not acquaint? must you not acquaint? must they not acquaint?
V-ing form
must I not be acquainting? must you not be acquainting? must he not be acquainting? must we not be acquainting? must you not be acquainting? must they not be acquainting?
Perfect
must I not have acquainted? must you not have acquainted? must he not have acquainted? must we not have acquainted? must you not have acquainted? must they not have acquainted?
V-ing perfect
must I not have been acquainting? must you not have been acquainting? must he not have been acquainting? must we not have been acquainting? must you not have been acquainting? must they not have been acquainting?