I must double-talk you must double-talk he must double-talk we must double-talk you must double-talk they must double-talk
V-ing form
I must be double-talking you must be double-talking he must be double-talking we must be double-talking you must be double-talking they must be double-talking
Perfect
I must have double-talked you must have double-talked he must have double-talked we must have double-talked you must have double-talked they must have double-talked
V-ing perfect
I must have been double-talking you must have been double-talking he must have been double-talking we must have been double-talking you must have been double-talking they must have been double-talking
Negation
Simple form
I must not double-talk you must not double-talk he must not double-talk we must not double-talk you must not double-talk they must not double-talk
V-ing form
I must not be double-talking you must not be double-talking he must not be double-talking we must not be double-talking you must not be double-talking they must not be double-talking
Perfect
I must not have double-talked you must not have double-talked he must not have double-talked we must not have double-talked you must not have double-talked they must not have double-talked
V-ing perfect
I must not have been double-talking you must not have been double-talking he must not have been double-talking we must not have been double-talking you must not have been double-talking they must not have been double-talking
Interrogative form
Simple form
must I double-talk? must you double-talk? must he double-talk? must we double-talk? must you double-talk? must they double-talk?
V-ing form
must I be double-talking? must you be double-talking? must he be double-talking? must we be double-talking? must you be double-talking? must they be double-talking?
Perfect
must I have double-talked? must you have double-talked? must he have double-talked? must we have double-talked? must you have double-talked? must they have double-talked?
V-ing perfect
must I have been double-talking? must you have been double-talking? must he have been double-talking? must we have been double-talking? must you have been double-talking? must they have been double-talking?
Interro-negative form
Simple form
must I not double-talk? must you not double-talk? must he not double-talk? must we not double-talk? must you not double-talk? must they not double-talk?
V-ing form
must I not be double-talking? must you not be double-talking? must he not be double-talking? must we not be double-talking? must you not be double-talking? must they not be double-talking?
Perfect
must I not have double-talked? must you not have double-talked? must he not have double-talked? must we not have double-talked? must you not have double-talked? must they not have double-talked?
V-ing perfect
must I not have been double-talking? must you not have been double-talking? must he not have been double-talking? must we not have been double-talking? must you not have been double-talking? must they not have been double-talking?