should untwine
Regular verb: untwine - untwined- untwined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd untwine
you'd untwine
he'd untwine
we'd untwine
you'd untwine
they'd untwine 	I'd be untwining
you'd be untwining
he'd be untwining
we'd be untwining
you'd be untwining
they'd be untwining	I should've untwined
you should've untwined
he should've untwined
we should've untwined
you should've untwined
they should've untwined	I should've been untwining
you should've been untwining
he should've been untwining
we should've been untwining
you should've been untwining
they should've been untwining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't untwine
you shouldn't untwine
he shouldn't untwine
we shouldn't untwine
you shouldn't untwine
they shouldn't untwine 	I shouldn't be untwining
you shouldn't be untwining
he shouldn't be untwining
we shouldn't be untwining
you shouldn't be untwining
they shouldn't be untwining	I shouldn't have untwined
you shouldn't have untwined
he shouldn't have untwined
we shouldn't have untwined
you shouldn't have untwined
they shouldn't have untwined	I shouldn't have been untwining
you shouldn't have been untwining
he shouldn't have been untwining
we shouldn't have been untwining
you shouldn't have been untwining
they shouldn't have been untwining	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I untwine?
shouldn't you untwine?
shouldn't he untwine?
shouldn't we untwine?
shouldn't you untwine?
shouldn't they untwine? 	shouldn't I be untwining?
shouldn't you be untwining?
shouldn't he be untwining?
shouldn't we be untwining?
shouldn't you be untwining?
shouldn't they be untwining? 	shouldn't I have untwined?
shouldn't you have untwined?
shouldn't he have untwined?
shouldn't we have untwined?
shouldn't you have untwined?
shouldn't they have untwined? 	shouldn't I have been untwining?
shouldn't you have been untwining?
shouldn't he have been untwining?
shouldn't we have been untwining?
shouldn't you have been untwining?
shouldn't they have been untwining?