I must acquaint you must acquaint she must acquaint we must acquaint you must acquaint they must acquaint
V-ing form
I must be acquainting you must be acquainting she must be acquainting we must be acquainting you must be acquainting they must be acquainting
Perfect
I must have acquainted you must have acquainted she 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 she must have been acquainting we must have been acquainting you must have been acquainting they must have been acquainting
Negation
Simple form
I mustn't acquaint you mustn't acquaint she mustn't acquaint we mustn't acquaint you mustn't acquaint they mustn't acquaint
V-ing form
I mustn't be acquainting you mustn't be acquainting she mustn't be acquainting we mustn't be acquainting you mustn't be acquainting they mustn't be acquainting
Perfect
I mustn't have acquainted you mustn't have acquainted she mustn't have acquainted we mustn't have acquainted you mustn't have acquainted they mustn't have acquainted
V-ing perfect
I mustn't have been acquainting you mustn't have been acquainting she mustn't have been acquainting we mustn't have been acquainting you mustn't have been acquainting they mustn't have been acquainting
Interrogative form
Simple form
must I acquaint? must you acquaint? must she acquaint? must we acquaint? must you acquaint? must they acquaint?
V-ing form
must I be acquainting? must you be acquainting? must she be acquainting? must we be acquainting? must you be acquainting? must they be acquainting?
Perfect
must I have acquainted? must you have acquainted? must she 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 she have been acquainting? must we have been acquainting? must you have been acquainting? must they have been acquainting?
Interro-negative form
Simple form
mustn't I acquaint? mustn't you acquaint? mustn't she acquaint? mustn't we acquaint? mustn't you acquaint? mustn't they acquaint?
V-ing form
mustn't I be acquainting? mustn't you be acquainting? mustn't she be acquainting? mustn't we be acquainting? mustn't you be acquainting? mustn't they be acquainting?
Perfect
mustn't I have acquainted? mustn't you have acquainted? mustn't she have acquainted? mustn't we have acquainted? mustn't you have acquainted? mustn't they have acquainted?
V-ing perfect
mustn't I have been acquainting? mustn't you have been acquainting? mustn't she have been acquainting? mustn't we have been acquainting? mustn't you have been acquainting? mustn't they have been acquainting?