I must refuge you must refuge she must refuge we must refuge you must refuge they must refuge
V-ing form
I must be refuging you must be refuging she must be refuging we must be refuging you must be refuging they must be refuging
Perfect
I must have refuged you must have refuged she must have refuged we must have refuged you must have refuged they must have refuged
V-ing perfect
I must have been refuging you must have been refuging she must have been refuging we must have been refuging you must have been refuging they must have been refuging
Negation
Simple form
I must not refuge you must not refuge she must not refuge we must not refuge you must not refuge they must not refuge
V-ing form
I must not be refuging you must not be refuging she must not be refuging we must not be refuging you must not be refuging they must not be refuging
Perfect
I must not have refuged you must not have refuged she must not have refuged we must not have refuged you must not have refuged they must not have refuged
V-ing perfect
I must not have been refuging you must not have been refuging she must not have been refuging we must not have been refuging you must not have been refuging they must not have been refuging
Interrogative form
Simple form
must I refuge? must you refuge? must she refuge? must we refuge? must you refuge? must they refuge?
V-ing form
must I be refuging? must you be refuging? must she be refuging? must we be refuging? must you be refuging? must they be refuging?
Perfect
must I have refuged? must you have refuged? must she have refuged? must we have refuged? must you have refuged? must they have refuged?
V-ing perfect
must I have been refuging? must you have been refuging? must she have been refuging? must we have been refuging? must you have been refuging? must they have been refuging?
Interro-negative form
Simple form
must I not refuge? must you not refuge? must she not refuge? must we not refuge? must you not refuge? must they not refuge?
V-ing form
must I not be refuging? must you not be refuging? must she not be refuging? must we not be refuging? must you not be refuging? must they not be refuging?
Perfect
must I not have refuged? must you not have refuged? must she not have refuged? must we not have refuged? must you not have refuged? must they not have refuged?
V-ing perfect
must I not have been refuging? must you not have been refuging? must she not have been refuging? must we not have been refuging? must you not have been refuging? must they not have been refuging?