must untwist
Regular verb: untwist - untwisted- untwisted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?