English verb conjugation
MUST UNTWIST

Regular verb: untwist - untwisted - untwisted

Affirmation

Simple form	V-ing form
I must untwist you must untwist he must untwist we must untwist you must untwist they must untwist	I must be untwisting you must be untwisting he must be untwisting we must be untwisting you must be untwisting they must be untwisting
Perfect	V-ing perfect
I must have untwisted you must have untwisted he must have untwisted we must have untwisted you must have untwisted they must have untwisted	I must have been untwisting you must have been untwisting he must have been untwisting we must have been untwisting you must have been untwisting they must have been untwisting

Negation

Simple form	V-ing form
I mustn't untwist you mustn't untwist he mustn't untwist we mustn't untwist you mustn't untwist they mustn't untwist	I mustn't be untwisting you mustn't be untwisting he mustn't be untwisting we mustn't be untwisting you mustn't be untwisting they mustn't be untwisting
Perfect	V-ing perfect
I mustn't have untwisted you mustn't have untwisted he mustn't have untwisted we mustn't have untwisted you mustn't have untwisted they mustn't have untwisted	I mustn't have been untwisting you mustn't have been untwisting he mustn't have been untwisting we mustn't have been untwisting you mustn't have been untwisting they mustn't have been untwisting

Interrogative form

Simple form	V-ing form
must I untwist? must you untwist? must he untwist? must we untwist? must you untwist? must they untwist?	must I be untwisting? must you be untwisting? must he be untwisting? must we be untwisting? must you be untwisting? must they be untwisting?
Perfect	V-ing perfect
must I have untwisted? must you have untwisted? must he have untwisted? must we have untwisted? must you have untwisted? must they have untwisted?	must I have been untwisting? must you have been untwisting? must he have been untwisting? must we have been untwisting? must you have been untwisting? must they have been untwisting?

Interro-negative form

Simple form	V-ing form
mustn't I untwist? mustn't you untwist? mustn't he untwist? mustn't we untwist? mustn't you untwist? mustn't they untwist?	mustn't I be untwisting? mustn't you be untwisting? mustn't he be untwisting? mustn't we be untwisting? mustn't you be untwisting? mustn't they be untwisting?
Perfect	V-ing perfect
mustn't I have untwisted? mustn't you have untwisted? mustn't he have untwisted? mustn't we have untwisted? mustn't you have untwisted? mustn't they have untwisted?	mustn't I have been untwisting? mustn't you have been untwisting? mustn't he have been untwisting? mustn't we have been untwisting? mustn't you have been untwisting? mustn't they have been untwisting?