English verb conjugation
MUST TUNE

Regular verb: tune - tuned - tuned

Affirmation

Simple form	V-ing form
I must tune you must tune she must tune we must tune you must tune they must tune	I must be tuning you must be tuning she must be tuning we must be tuning you must be tuning they must be tuning
Perfect	V-ing perfect
I must have tuned you must have tuned she must have tuned we must have tuned you must have tuned they must have tuned	I must have been tuning you must have been tuning she must have been tuning we must have been tuning you must have been tuning they must have been tuning

Negation

Simple form	V-ing form
I must not tune you must not tune she must not tune we must not tune you must not tune they must not tune	I must not be tuning you must not be tuning she must not be tuning we must not be tuning you must not be tuning they must not be tuning
Perfect	V-ing perfect
I must not have tuned you must not have tuned she must not have tuned we must not have tuned you must not have tuned they must not have tuned	I must not have been tuning you must not have been tuning she 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	V-ing form
must I tune? must you tune? must she tune? must we tune? must you tune? must they tune?	must I be tuning? must you be tuning? must she be tuning? must we be tuning? must you be tuning? must they be tuning?
Perfect	V-ing perfect
must I have tuned? must you have tuned? must she have tuned? must we have tuned? must you have tuned? must they have tuned?	must I have been tuning? must you have been tuning? must she have been tuning? must we have been tuning? must you have been tuning? must they have been tuning?

Interro-negative form

Simple form	V-ing form
must I not tune? must you not tune? must she not tune? must we not tune? must you not tune? must they not tune?	must I not be tuning? must you not be tuning? must she not be tuning? must we not be tuning? must you not be tuning? must they not be tuning?
Perfect	V-ing perfect
must I not have tuned? must you not have tuned? must she not have tuned? must we not have tuned? must you not have tuned? must they not have tuned?	must I not have been tuning? must you not have been tuning? must she not have been tuning? must we not have been tuning? must you not have been tuning? must they not have been tuning?