I could wink you could wink she could wink we could wink you could wink they could wink
V-ing form
I could be winking you could be winking she could be winking we could be winking you could be winking they could be winking
Perfect
I could have winked you could have winked she 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 she 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 she 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 she 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 she 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 she 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 she wink? could we wink? could you wink? could they wink?
V-ing form
could I be winking? could you be winking? could she be winking? could we be winking? could you be winking? could they be winking?
Perfect
could I have winked? could you have winked? could she 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 she 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 she 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 she 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 she 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 she not have been winking? could we not have been winking? could you not have been winking? could they not have been winking?