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