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