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 mustn't untune you mustn't untune he mustn't untune we mustn't untune you mustn't untune they mustn't untune	I mustn't be untuning you mustn't be untuning he mustn't be untuning we mustn't be untuning you mustn't be untuning they mustn't be untuning
Perfect	V-ing perfect
I mustn't have untuned you mustn't have untuned he mustn't have untuned we mustn't have untuned you mustn't have untuned they mustn't have untuned	I mustn't have been untuning you mustn't have been untuning he mustn't have been untuning we mustn't have been untuning you mustn't have been untuning they mustn't 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
mustn't I untune? mustn't you untune? mustn't he untune? mustn't we untune? mustn't you untune? mustn't they untune?	mustn't I be untuning? mustn't you be untuning? mustn't he be untuning? mustn't we be untuning? mustn't you be untuning? mustn't they be untuning?
Perfect	V-ing perfect
mustn't I have untuned? mustn't you have untuned? mustn't he have untuned? mustn't we have untuned? mustn't you have untuned? mustn't they have untuned?	mustn't I have been untuning? mustn't you have been untuning? mustn't he have been untuning? mustn't we have been untuning? mustn't you have been untuning? mustn't they have been untuning?