I could wink you could wink he could wink we could wink you could wink they could wink
V-ing form
I could be winking you could be winking he could be winking we could be winking you could be winking they could be winking
Perfect
I could have winked you could have winked he could have winked we could have winked you could have winked they could have winked
V-ing perfect
I could have been winking you could have been winking he could have been winking we could have been winking you could have been winking they could have been winking
Negation
Simple form
I could not wink you could not wink he could not wink we could not wink you could not wink they could not wink
V-ing form
I could not be winking you could not be winking he could not be winking we could not be winking you could not be winking they could not be winking
Perfect
I could not have winked you could not have winked he could not have winked we could not have winked you could not have winked they could not have winked
V-ing perfect
I could not have been winking you could not have been winking he could not have been winking we could not have been winking you could not have been winking they could not have been winking
Interrogative form
Simple form
could I wink? could you wink? could he wink? could we wink? could you wink? could they wink?
V-ing form
could I be winking? could you be winking? could he be winking? could we be winking? could you be winking? could they be winking?
Perfect
could I have winked? could you have winked? could he have winked? could we have winked? could you have winked? could they have winked?
V-ing perfect
could I have been winking? could you have been winking? could he have been winking? could we have been winking? could you have been winking? could they have been winking?
Interro-negative form
Simple form
could I not wink? could you not wink? could he not wink? could we not wink? could you not wink? could they not wink?
V-ing form
could I not be winking? could you not be winking? could he not be winking? could we not be winking? could you not be winking? could they not be winking?
Perfect
could I not have winked? could you not have winked? could he not have winked? could we not have winked? could you not have winked? could they not have winked?
V-ing perfect
could I not have been winking? could you not have been winking? could he not have been winking? could we not have been winking? could you not have been winking? could they not have been winking?