I could unwind you could unwind he could unwind we could unwind you could unwind they could unwind
V-ing form
I could be unwinding you could be unwinding he could be unwinding we could be unwinding you could be unwinding they could be unwinding
Perfect
I could have unwound you could have unwound he could have unwound we could have unwound you could have unwound they could have unwound
V-ing perfect
I could have been unwinding you could have been unwinding he could have been unwinding we could have been unwinding you could have been unwinding they could have been unwinding
Negation
Simple form
I could not unwind you could not unwind he could not unwind we could not unwind you could not unwind they could not unwind
V-ing form
I could not be unwinding you could not be unwinding he could not be unwinding we could not be unwinding you could not be unwinding they could not be unwinding
Perfect
I could not have unwound you could not have unwound he could not have unwound we could not have unwound you could not have unwound they could not have unwound
V-ing perfect
I could not have been unwinding you could not have been unwinding he could not have been unwinding we could not have been unwinding you could not have been unwinding they could not have been unwinding
Interrogative form
Simple form
could I unwind? could you unwind? could he unwind? could we unwind? could you unwind? could they unwind?
V-ing form
could I be unwinding? could you be unwinding? could he be unwinding? could we be unwinding? could you be unwinding? could they be unwinding?
Perfect
could I have unwound? could you have unwound? could he have unwound? could we have unwound? could you have unwound? could they have unwound?
V-ing perfect
could I have been unwinding? could you have been unwinding? could he have been unwinding? could we have been unwinding? could you have been unwinding? could they have been unwinding?
Interro-negative form
Simple form
could I not unwind? could you not unwind? could he not unwind? could we not unwind? could you not unwind? could they not unwind?
V-ing form
could I not be unwinding? could you not be unwinding? could he not be unwinding? could we not be unwinding? could you not be unwinding? could they not be unwinding?
Perfect
could I not have unwound? could you not have unwound? could he not have unwound? could we not have unwound? could you not have unwound? could they not have unwound?
V-ing perfect
could I not have been unwinding? could you not have been unwinding? could he not have been unwinding? could we not have been unwinding? could you not have been unwinding? could they not have been unwinding?