English verb conjugation
MUST UNTANGLE

Regular verb: untangle - untangled - untangled

Affirmation

Simple form	V-ing form
I must untangle you must untangle she must untangle we must untangle you must untangle they must untangle	I must be untangling you must be untangling she 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 she 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 she 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 must not untangle you must not untangle she must not untangle we must not untangle you must not untangle they must not untangle	I must not be untangling you must not be untangling she must not be untangling we must not be untangling you must not be untangling they must not be untangling
Perfect	V-ing perfect
I must not have untangled you must not have untangled she must not have untangled we must not have untangled you must not have untangled they must not have untangled	I must not have been untangling you must not have been untangling she must not have been untangling we must not have been untangling you must not have been untangling they must not have been untangling

Interrogative form

Simple form	V-ing form
must I untangle? must you untangle? must she untangle? must we untangle? must you untangle? must they untangle?	must I be untangling? must you be untangling? must she 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 she 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 she 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
must I not untangle? must you not untangle? must she not untangle? must we not untangle? must you not untangle? must they not untangle?	must I not be untangling? must you not be untangling? must she not be untangling? must we not be untangling? must you not be untangling? must they not be untangling?
Perfect	V-ing perfect
must I not have untangled? must you not have untangled? must she not have untangled? must we not have untangled? must you not have untangled? must they not have untangled?	must I not have been untangling? must you not have been untangling? must she not have been untangling? must we not have been untangling? must you not have been untangling? must they not have been untangling?