English verb conjugation
MUST UNTUNE

Regular verb: untune - untuned - untuned

Affirmation

Simple form	V-ing form
I must untune you must untune he must untune we must untune you must untune they must untune	I must be untuning you must be untuning he must be untuning we must be untuning you must be untuning they must be untuning
Perfect	V-ing perfect
I must have untuned you must have untuned he must have untuned we must have untuned you must have untuned they must have untuned	I must have been untuning you must have been untuning he must have been untuning we must have been untuning you must have been untuning they must have been untuning

Negation

Simple form	V-ing form
I must not untune you must not untune he must not untune we must not untune you must not untune they must not untune	I must not be untuning you must not be untuning he must not be untuning we must not be untuning you must not be untuning they must not be untuning
Perfect	V-ing perfect
I must not have untuned you must not have untuned he must not have untuned we must not have untuned you must not have untuned they must not have untuned	I must not have been untuning you must not have been untuning he must not have been untuning we must not have been untuning you must not have been untuning they must not have been untuning

Interrogative form

Simple form	V-ing form
must I untune? must you untune? must he untune? must we untune? must you untune? must they untune?	must I be untuning? must you be untuning? must he be untuning? must we be untuning? must you be untuning? must they be untuning?
Perfect	V-ing perfect
must I have untuned? must you have untuned? must he have untuned? must we have untuned? must you have untuned? must they have untuned?	must I have been untuning? must you have been untuning? must he have been untuning? must we have been untuning? must you have been untuning? must they have been untuning?

Interro-negative form

Simple form	V-ing form
must I not untune? must you not untune? must he not untune? must we not untune? must you not untune? must they not untune?	must I not be untuning? must you not be untuning? must he not be untuning? must we not be untuning? must you not be untuning? must they not be untuning?
Perfect	V-ing perfect
must I not have untuned? must you not have untuned? must he not have untuned? must we not have untuned? must you not have untuned? must they not have untuned?	must I not have been untuning? must you not have been untuning? must he not have been untuning? must we not have been untuning? must you not have been untuning? must they not have been untuning?