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