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