English verb conjugation
MUST RETUNE

Regular verb: retune - retuned - retuned

Affirmation

Simple form	V-ing form
I must retune you must retune he must retune we must retune you must retune they must retune	I must be retuning you must be retuning he must be retuning we must be retuning you must be retuning they must be retuning
Perfect	V-ing perfect
I must have retuned you must have retuned he must have retuned we must have retuned you must have retuned they must have retuned	I must have been retuning you must have been retuning he must have been retuning we must have been retuning you must have been retuning they must have been retuning

Negation

Simple form	V-ing form
I must not retune you must not retune he must not retune we must not retune you must not retune they must not retune	I must not be retuning you must not be retuning he must not be retuning we must not be retuning you must not be retuning they must not be retuning
Perfect	V-ing perfect
I must not have retuned you must not have retuned he must not have retuned we must not have retuned you must not have retuned they must not have retuned	I must not have been retuning you must not have been retuning he must not have been retuning we must not have been retuning you must not have been retuning they must not have been retuning

Interrogative form

Simple form	V-ing form
must I retune? must you retune? must he retune? must we retune? must you retune? must they retune?	must I be retuning? must you be retuning? must he be retuning? must we be retuning? must you be retuning? must they be retuning?
Perfect	V-ing perfect
must I have retuned? must you have retuned? must he have retuned? must we have retuned? must you have retuned? must they have retuned?	must I have been retuning? must you have been retuning? must he have been retuning? must we have been retuning? must you have been retuning? must they have been retuning?

Interro-negative form

Simple form	V-ing form
must I not retune? must you not retune? must he not retune? must we not retune? must you not retune? must they not retune?	must I not be retuning? must you not be retuning? must he not be retuning? must we not be retuning? must you not be retuning? must they not be retuning?
Perfect	V-ing perfect
must I not have retuned? must you not have retuned? must he not have retuned? must we not have retuned? must you not have retuned? must they not have retuned?	must I not have been retuning? must you not have been retuning? must he not have been retuning? must we not have been retuning? must you not have been retuning? must they not have been retuning?