I could parley you could parley he could parley we could parley you could parley they could parley
V-ing form
I could be parleying you could be parleying he could be parleying we could be parleying you could be parleying they could be parleying
Perfect
I could have parleyed you could have parleyed he could have parleyed we could have parleyed you could have parleyed they could have parleyed
V-ing perfect
I could have been parleying you could have been parleying he could have been parleying we could have been parleying you could have been parleying they could have been parleying
Negation
Simple form
I could not parley you could not parley he could not parley we could not parley you could not parley they could not parley
V-ing form
I could not be parleying you could not be parleying he could not be parleying we could not be parleying you could not be parleying they could not be parleying
Perfect
I could not have parleyed you could not have parleyed he could not have parleyed we could not have parleyed you could not have parleyed they could not have parleyed
V-ing perfect
I could not have been parleying you could not have been parleying he could not have been parleying we could not have been parleying you could not have been parleying they could not have been parleying
Interrogative form
Simple form
could I parley? could you parley? could he parley? could we parley? could you parley? could they parley?
V-ing form
could I be parleying? could you be parleying? could he be parleying? could we be parleying? could you be parleying? could they be parleying?
Perfect
could I have parleyed? could you have parleyed? could he have parleyed? could we have parleyed? could you have parleyed? could they have parleyed?
V-ing perfect
could I have been parleying? could you have been parleying? could he have been parleying? could we have been parleying? could you have been parleying? could they have been parleying?
Interro-negative form
Simple form
could I not parley? could you not parley? could he not parley? could we not parley? could you not parley? could they not parley?
V-ing form
could I not be parleying? could you not be parleying? could he not be parleying? could we not be parleying? could you not be parleying? could they not be parleying?
Perfect
could I not have parleyed? could you not have parleyed? could he not have parleyed? could we not have parleyed? could you not have parleyed? could they not have parleyed?
V-ing perfect
could I not have been parleying? could you not have been parleying? could he not have been parleying? could we not have been parleying? could you not have been parleying? could they not have been parleying?