Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must untwist untwist you must untwist untwist he must untwist untwist we must untwist untwist you must untwist untwist they must untwist untwist
V-ing form
I must be untwist untwisting you must be untwist untwisting he must be untwist untwisting we must be untwist untwisting you must be untwist untwisting they must be untwist untwisting
Perfect
I must have untwist untwisted you must have untwist untwisted he must have untwist untwisted we must have untwist untwisted you must have untwist untwisted they must have untwist untwisted
V-ing perfect
I must have been untwist untwisting you must have been untwist untwisting he must have been untwist untwisting we must have been untwist untwisting you must have been untwist untwisting they must have been untwist untwisting
Negation
Simple form
I mustn't untwist untwist you mustn't untwist untwist he mustn't untwist untwist we mustn't untwist untwist you mustn't untwist untwist they mustn't untwist untwist
V-ing form
I mustn't be untwist untwisting you mustn't be untwist untwisting he mustn't be untwist untwisting we mustn't be untwist untwisting you mustn't be untwist untwisting they mustn't be untwist untwisting
Perfect
I mustn't have untwist untwisted you mustn't have untwist untwisted he mustn't have untwist untwisted we mustn't have untwist untwisted you mustn't have untwist untwisted they mustn't have untwist untwisted
V-ing perfect
I mustn't have been untwist untwisting you mustn't have been untwist untwisting he mustn't have been untwist untwisting we mustn't have been untwist untwisting you mustn't have been untwist untwisting they mustn't have been untwist untwisting
Interrogative form
Simple form
must I untwist untwist? must you untwist untwist? must he untwist untwist? must we untwist untwist? must you untwist untwist? must they untwist untwist?
V-ing form
must I be untwist untwisting? must you be untwist untwisting? must he be untwist untwisting? must we be untwist untwisting? must you be untwist untwisting? must they be untwist untwisting?
Perfect
must I have untwist untwisted? must you have untwist untwisted? must he have untwist untwisted? must we have untwist untwisted? must you have untwist untwisted? must they have untwist untwisted?
V-ing perfect
must I have been untwist untwisting? must you have been untwist untwisting? must he have been untwist untwisting? must we have been untwist untwisting? must you have been untwist untwisting? must they have been untwist untwisting?
Interro-negative form
Simple form
mustn't I untwist untwist? mustn't you untwist untwist? mustn't he untwist untwist? mustn't we untwist untwist? mustn't you untwist untwist? mustn't they untwist untwist?
V-ing form
mustn't I be untwist untwisting? mustn't you be untwist untwisting? mustn't he be untwist untwisting? mustn't we be untwist untwisting? mustn't you be untwist untwisting? mustn't they be untwist untwisting?
Perfect
mustn't I have untwist untwisted? mustn't you have untwist untwisted? mustn't he have untwist untwisted? mustn't we have untwist untwisted? mustn't you have untwist untwisted? mustn't they have untwist untwisted?
V-ing perfect
mustn't I have been untwist untwisting? mustn't you have been untwist untwisting? mustn't he have been untwist untwisting? mustn't we have been untwist untwisting? mustn't you have been untwist untwisting? mustn't they have been untwist untwisting?