could unravel
Regular verb: unravel - unravelled- unravelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unravel
you could unravel
she could unravel
we could unravel
you could unravel
they could unravel 	I could be unravelling
you could be unravelling
she could be unravelling
we could be unravelling
you could be unravelling
they could be unravelling	I could have unravelled
you could have unravelled
she could have unravelled
we could have unravelled
you could have unravelled
they could have unravelled	I could have been unravelling
you could have been unravelling
she could have been unravelling
we could have been unravelling
you could have been unravelling
they could have been unravelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not unravel
you could not unravel
she could not unravel
we could not unravel
you could not unravel
they could not unravel 	I could not be unravelling
you could not be unravelling
she could not be unravelling
we could not be unravelling
you could not be unravelling
they could not be unravelling	I could not have unravelled
you could not have unravelled
she could not have unravelled
we could not have unravelled
you could not have unravelled
they could not have unravelled	I could not have been unravelling
you could not have been unravelling
she could not have been unravelling
we could not have been unravelling
you could not have been unravelling
they could not have been unravelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unravel?
could you unravel?
could she unravel?
could we unravel?
could you unravel?
could they unravel? 	could I be unravelling?
could you be unravelling?
could she be unravelling?
could we be unravelling?
could you be unravelling?
could they be unravelling? 	could I have unravelled?
could you have unravelled?
could she have unravelled?
could we have unravelled?
could you have unravelled?
could they have unravelled? 	could I have been unravelling?
could you have been unravelling?
could she have been unravelling?
could we have been unravelling?
could you have been unravelling?
could they have been unravelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not unravel?
could you not unravel?
could she not unravel?
could we not unravel?
could you not unravel?
could they not unravel? 	could I not be unravelling?
could you not be unravelling?
could she not be unravelling?
could we not be unravelling?
could you not be unravelling?
could they not be unravelling? 	could I not have unravelled?
could you not have unravelled?
could she not have unravelled?
could we not have unravelled?
could you not have unravelled?
could they not have unravelled? 	could I not have been unravelling?
could you not have been unravelling?
could she not have been unravelling?
could we not have been unravelling?
could you not have been unravelling?
could they not have been unravelling?