I could shun you could shun he could shun we could shun you could shun they could shun
V-ing form
I could be shunning you could be shunning he could be shunning we could be shunning you could be shunning they could be shunning
Perfect
I could have shunned you could have shunned he could have shunned we could have shunned you could have shunned they could have shunned
V-ing perfect
I could have been shunning you could have been shunning he could have been shunning we could have been shunning you could have been shunning they could have been shunning
Negation
Simple form
I could not shun you could not shun he could not shun we could not shun you could not shun they could not shun
V-ing form
I could not be shunning you could not be shunning he could not be shunning we could not be shunning you could not be shunning they could not be shunning
Perfect
I could not have shunned you could not have shunned he could not have shunned we could not have shunned you could not have shunned they could not have shunned
V-ing perfect
I could not have been shunning you could not have been shunning he could not have been shunning we could not have been shunning you could not have been shunning they could not have been shunning
Interrogative form
Simple form
could I shun? could you shun? could he shun? could we shun? could you shun? could they shun?
V-ing form
could I be shunning? could you be shunning? could he be shunning? could we be shunning? could you be shunning? could they be shunning?
Perfect
could I have shunned? could you have shunned? could he have shunned? could we have shunned? could you have shunned? could they have shunned?
V-ing perfect
could I have been shunning? could you have been shunning? could he have been shunning? could we have been shunning? could you have been shunning? could they have been shunning?
Interro-negative form
Simple form
could I not shun? could you not shun? could he not shun? could we not shun? could you not shun? could they not shun?
V-ing form
could I not be shunning? could you not be shunning? could he not be shunning? could we not be shunning? could you not be shunning? could they not be shunning?
Perfect
could I not have shunned? could you not have shunned? could he not have shunned? could we not have shunned? could you not have shunned? could they not have shunned?
V-ing perfect
could I not have been shunning? could you not have been shunning? could he not have been shunning? could we not have been shunning? could you not have been shunning? could they not have been shunning?