English verb conjugation
MUST UNTANGLE

Regular verb: untangle - untangled - untangled

Affirmation

Simple form	V-ing form
I must untangle you must untangle he must untangle we must untangle you must untangle they must untangle	I must be untangling you must be untangling he must be untangling we must be untangling you must be untangling they must be untangling
Perfect	V-ing perfect
I must have untangled you must have untangled he must have untangled we must have untangled you must have untangled they must have untangled	I must have been untangling you must have been untangling he must have been untangling we must have been untangling you must have been untangling they must have been untangling

Negation

Simple form	V-ing form
I mustn't untangle you mustn't untangle he mustn't untangle we mustn't untangle you mustn't untangle they mustn't untangle	I mustn't be untangling you mustn't be untangling he mustn't be untangling we mustn't be untangling you mustn't be untangling they mustn't be untangling
Perfect	V-ing perfect
I mustn't have untangled you mustn't have untangled he mustn't have untangled we mustn't have untangled you mustn't have untangled they mustn't have untangled	I mustn't have been untangling you mustn't have been untangling he mustn't have been untangling we mustn't have been untangling you mustn't have been untangling they mustn't have been untangling

Interrogative form

Simple form	V-ing form
must I untangle? must you untangle? must he untangle? must we untangle? must you untangle? must they untangle?	must I be untangling? must you be untangling? must he be untangling? must we be untangling? must you be untangling? must they be untangling?
Perfect	V-ing perfect
must I have untangled? must you have untangled? must he have untangled? must we have untangled? must you have untangled? must they have untangled?	must I have been untangling? must you have been untangling? must he have been untangling? must we have been untangling? must you have been untangling? must they have been untangling?

Interro-negative form

Simple form	V-ing form
mustn't I untangle? mustn't you untangle? mustn't he untangle? mustn't we untangle? mustn't you untangle? mustn't they untangle?	mustn't I be untangling? mustn't you be untangling? mustn't he be untangling? mustn't we be untangling? mustn't you be untangling? mustn't they be untangling?
Perfect	V-ing perfect
mustn't I have untangled? mustn't you have untangled? mustn't he have untangled? mustn't we have untangled? mustn't you have untangled? mustn't they have untangled?	mustn't I have been untangling? mustn't you have been untangling? mustn't he have been untangling? mustn't we have been untangling? mustn't you have been untangling? mustn't they have been untangling?