I must apologize you must apologize he must apologize we must apologize you must apologize they must apologize
V-ing form
I must be apologizing you must be apologizing he must be apologizing we must be apologizing you must be apologizing they must be apologizing
Perfect
I must have apologized you must have apologized he must have apologized we must have apologized you must have apologized they must have apologized
V-ing perfect
I must have been apologizing you must have been apologizing he must have been apologizing we must have been apologizing you must have been apologizing they must have been apologizing
Negation
Simple form
I must not apologize you must not apologize he must not apologize we must not apologize you must not apologize they must not apologize
V-ing form
I must not be apologizing you must not be apologizing he must not be apologizing we must not be apologizing you must not be apologizing they must not be apologizing
Perfect
I must not have apologized you must not have apologized he must not have apologized we must not have apologized you must not have apologized they must not have apologized
V-ing perfect
I must not have been apologizing you must not have been apologizing he must not have been apologizing we must not have been apologizing you must not have been apologizing they must not have been apologizing
Interrogative form
Simple form
must I apologize? must you apologize? must he apologize? must we apologize? must you apologize? must they apologize?
V-ing form
must I be apologizing? must you be apologizing? must he be apologizing? must we be apologizing? must you be apologizing? must they be apologizing?
Perfect
must I have apologized? must you have apologized? must he have apologized? must we have apologized? must you have apologized? must they have apologized?
V-ing perfect
must I have been apologizing? must you have been apologizing? must he have been apologizing? must we have been apologizing? must you have been apologizing? must they have been apologizing?
Interro-negative form
Simple form
must I not apologize? must you not apologize? must he not apologize? must we not apologize? must you not apologize? must they not apologize?
V-ing form
must I not be apologizing? must you not be apologizing? must he not be apologizing? must we not be apologizing? must you not be apologizing? must they not be apologizing?
Perfect
must I not have apologized? must you not have apologized? must he not have apologized? must we not have apologized? must you not have apologized? must they not have apologized?
V-ing perfect
must I not have been apologizing? must you not have been apologizing? must he not have been apologizing? must we not have been apologizing? must you not have been apologizing? must they not have been apologizing?