English verb conjugation
MUST UNTWINE

Regular verb: untwine - untwined - untwined

Affirmation

Simple form	V-ing form
I must untwine you must untwine he must untwine we must untwine you must untwine they must untwine	I must be untwining you must be untwining he must be untwining we must be untwining you must be untwining they must be untwining
Perfect	V-ing perfect
I must have untwined you must have untwined he must have untwined we must have untwined you must have untwined they must have untwined	I must have been untwining you must have been untwining he must have been untwining we must have been untwining you must have been untwining they must have been untwining

Negation

Simple form	V-ing form
I must not untwine you must not untwine he must not untwine we must not untwine you must not untwine they must not untwine	I must not be untwining you must not be untwining he must not be untwining we must not be untwining you must not be untwining they must not be untwining
Perfect	V-ing perfect
I must not have untwined you must not have untwined he must not have untwined we must not have untwined you must not have untwined they must not have untwined	I must not have been untwining you must not have been untwining he must not have been untwining we must not have been untwining you must not have been untwining they must not have been untwining

Interrogative form

Simple form	V-ing form
must I untwine? must you untwine? must he untwine? must we untwine? must you untwine? must they untwine?	must I be untwining? must you be untwining? must he be untwining? must we be untwining? must you be untwining? must they be untwining?
Perfect	V-ing perfect
must I have untwined? must you have untwined? must he have untwined? must we have untwined? must you have untwined? must they have untwined?	must I have been untwining? must you have been untwining? must he have been untwining? must we have been untwining? must you have been untwining? must they have been untwining?

Interro-negative form

Simple form	V-ing form
must I not untwine? must you not untwine? must he not untwine? must we not untwine? must you not untwine? must they not untwine?	must I not be untwining? must you not be untwining? must he not be untwining? must we not be untwining? must you not be untwining? must they not be untwining?
Perfect	V-ing perfect
must I not have untwined? must you not have untwined? must he not have untwined? must we not have untwined? must you not have untwined? must they not have untwined?	must I not have been untwining? must you not have been untwining? must he not have been untwining? must we not have been untwining? must you not have been untwining? must they not have been untwining?