I must tune you must tune he must tune we must tune you must tune they must tune
V-ing form
I must be tuning you must be tuning he must be tuning we must be tuning you must be tuning they must be tuning
Perfect
I must have tuned you must have tuned he must have tuned we must have tuned you must have tuned they must have tuned
V-ing perfect
I must have been tuning you must have been tuning he must have been tuning we must have been tuning you must have been tuning they must have been tuning
Negation
Simple form
I must not tune you must not tune he must not tune we must not tune you must not tune they must not tune
V-ing form
I must not be tuning you must not be tuning he must not be tuning we must not be tuning you must not be tuning they must not be tuning
Perfect
I must not have tuned you must not have tuned he must not have tuned we must not have tuned you must not have tuned they must not have tuned
V-ing perfect
I must not have been tuning you must not have been tuning he must not have been tuning we must not have been tuning you must not have been tuning they must not have been tuning
Interrogative form
Simple form
must I tune? must you tune? must he tune? must we tune? must you tune? must they tune?
V-ing form
must I be tuning? must you be tuning? must he be tuning? must we be tuning? must you be tuning? must they be tuning?
Perfect
must I have tuned? must you have tuned? must he have tuned? must we have tuned? must you have tuned? must they have tuned?
V-ing perfect
must I have been tuning? must you have been tuning? must he have been tuning? must we have been tuning? must you have been tuning? must they have been tuning?
Interro-negative form
Simple form
must I not tune? must you not tune? must he not tune? must we not tune? must you not tune? must they not tune?
V-ing form
must I not be tuning? must you not be tuning? must he not be tuning? must we not be tuning? must you not be tuning? must they not be tuning?
Perfect
must I not have tuned? must you not have tuned? must he not have tuned? must we not have tuned? must you not have tuned? must they not have tuned?
V-ing perfect
must I not have been tuning? must you not have been tuning? must he not have been tuning? must we not have been tuning? must you not have been tuning? must they not have been tuning?