I must retake you must retake he must retake we must retake you must retake they must retake
V-ing form
I must be retaking you must be retaking he must be retaking we must be retaking you must be retaking they must be retaking
Perfect
I must have retaken you must have retaken he must have retaken we must have retaken you must have retaken they must have retaken
V-ing perfect
I must have been retaking you must have been retaking he must have been retaking we must have been retaking you must have been retaking they must have been retaking
Negation
Simple form
I mustn't retake you mustn't retake he mustn't retake we mustn't retake you mustn't retake they mustn't retake
V-ing form
I mustn't be retaking you mustn't be retaking he mustn't be retaking we mustn't be retaking you mustn't be retaking they mustn't be retaking
Perfect
I mustn't have retaken you mustn't have retaken he mustn't have retaken we mustn't have retaken you mustn't have retaken they mustn't have retaken
V-ing perfect
I mustn't have been retaking you mustn't have been retaking he mustn't have been retaking we mustn't have been retaking you mustn't have been retaking they mustn't have been retaking
Interrogative form
Simple form
must I retake? must you retake? must he retake? must we retake? must you retake? must they retake?
V-ing form
must I be retaking? must you be retaking? must he be retaking? must we be retaking? must you be retaking? must they be retaking?
Perfect
must I have retaken? must you have retaken? must he have retaken? must we have retaken? must you have retaken? must they have retaken?
V-ing perfect
must I have been retaking? must you have been retaking? must he have been retaking? must we have been retaking? must you have been retaking? must they have been retaking?
Interro-negative form
Simple form
mustn't I retake? mustn't you retake? mustn't he retake? mustn't we retake? mustn't you retake? mustn't they retake?
V-ing form
mustn't I be retaking? mustn't you be retaking? mustn't he be retaking? mustn't we be retaking? mustn't you be retaking? mustn't they be retaking?
Perfect
mustn't I have retaken? mustn't you have retaken? mustn't he have retaken? mustn't we have retaken? mustn't you have retaken? mustn't they have retaken?
V-ing perfect
mustn't I have been retaking? mustn't you have been retaking? mustn't he have been retaking? mustn't we have been retaking? mustn't you have been retaking? mustn't they have been retaking?