could unroll
Regular verb: unroll - unrolled- unrolled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unroll
you could unroll
he could unroll
we could unroll
you could unroll
they could unroll 	I could be unrolling
you could be unrolling
he could be unrolling
we could be unrolling
you could be unrolling
they could be unrolling	I could have unrolled
you could have unrolled
he could have unrolled
we could have unrolled
you could have unrolled
they could have unrolled	I could have been unrolling
you could have been unrolling
he could have been unrolling
we could have been unrolling
you could have been unrolling
they could have been unrolling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not unroll
you could not unroll
he could not unroll
we could not unroll
you could not unroll
they could not unroll 	I could not be unrolling
you could not be unrolling
he could not be unrolling
we could not be unrolling
you could not be unrolling
they could not be unrolling	I could not have unrolled
you could not have unrolled
he could not have unrolled
we could not have unrolled
you could not have unrolled
they could not have unrolled	I could not have been unrolling
you could not have been unrolling
he could not have been unrolling
we could not have been unrolling
you could not have been unrolling
they could not have been unrolling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unroll?
could you unroll?
could he unroll?
could we unroll?
could you unroll?
could they unroll? 	could I be unrolling?
could you be unrolling?
could he be unrolling?
could we be unrolling?
could you be unrolling?
could they be unrolling? 	could I have unrolled?
could you have unrolled?
could he have unrolled?
could we have unrolled?
could you have unrolled?
could they have unrolled? 	could I have been unrolling?
could you have been unrolling?
could he have been unrolling?
could we have been unrolling?
could you have been unrolling?
could they have been unrolling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not unroll?
could you not unroll?
could he not unroll?
could we not unroll?
could you not unroll?
could they not unroll? 	could I not be unrolling?
could you not be unrolling?
could he not be unrolling?
could we not be unrolling?
could you not be unrolling?
could they not be unrolling? 	could I not have unrolled?
could you not have unrolled?
could he not have unrolled?
could we not have unrolled?
could you not have unrolled?
could they not have unrolled? 	could I not have been unrolling?
could you not have been unrolling?
could he not have been unrolling?
could we not have been unrolling?
could you not have been unrolling?
could they not have been unrolling?