must untwine
Regular verb: untwine - untwined- untwined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must untwine
you must untwine
she must untwine
we must untwine
you must untwine
they must untwine 	I must be untwining
you must be untwining
she must be untwining
we must be untwining
you must be untwining
they must be untwining	I must have untwined
you must have untwined
she must have untwined
we must have untwined
you must have untwined
they must have untwined	I must have been untwining
you must have been untwining
she must have been untwining
we must have been untwining
you must have been untwining
they must have been untwining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not untwine
you must not untwine
she must not untwine
we must not untwine
you must not untwine
they must not untwine 	I must not be untwining
you must not be untwining
she must not be untwining
we must not be untwining
you must not be untwining
they must not be untwining	I must not have untwined
you must not have untwined
she must not have untwined
we must not have untwined
you must not have untwined
they must not have untwined	I must not have been untwining
you must not have been untwining
she must not have been untwining
we must not have been untwining
you must not have been untwining
they must not have been untwining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I untwine?
must you untwine?
must she untwine?
must we untwine?
must you untwine?
must they untwine? 	must I be untwining?
must you be untwining?
must she be untwining?
must we be untwining?
must you be untwining?
must they be untwining? 	must I have untwined?
must you have untwined?
must she have untwined?
must we have untwined?
must you have untwined?
must they have untwined? 	must I have been untwining?
must you have been untwining?
must she have been untwining?
must we have been untwining?
must you have been untwining?
must they have been untwining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not untwine?
must you not untwine?
must she not untwine?
must we not untwine?
must you not untwine?
must they not untwine? 	must I not be untwining?
must you not be untwining?
must she not be untwining?
must we not be untwining?
must you not be untwining?
must they not be untwining? 	must I not have untwined?
must you not have untwined?
must she not have untwined?
must we not have untwined?
must you not have untwined?
must they not have untwined? 	must I not have been untwining?
must you not have been untwining?
must she not have been untwining?
must we not have been untwining?
must you not have been untwining?
must they not have been untwining?