I must unbar you must unbar he must unbar we must unbar you must unbar they must unbar
V-ing form
I must be unbarring you must be unbarring he must be unbarring we must be unbarring you must be unbarring they must be unbarring
Perfect
I must have unbarred you must have unbarred he must have unbarred we must have unbarred you must have unbarred they must have unbarred
V-ing perfect
I must have been unbarring you must have been unbarring he must have been unbarring we must have been unbarring you must have been unbarring they must have been unbarring
Negation
Simple form
I must not unbar you must not unbar he must not unbar we must not unbar you must not unbar they must not unbar
V-ing form
I must not be unbarring you must not be unbarring he must not be unbarring we must not be unbarring you must not be unbarring they must not be unbarring
Perfect
I must not have unbarred you must not have unbarred he must not have unbarred we must not have unbarred you must not have unbarred they must not have unbarred
V-ing perfect
I must not have been unbarring you must not have been unbarring he must not have been unbarring we must not have been unbarring you must not have been unbarring they must not have been unbarring
Interrogative form
Simple form
must I unbar? must you unbar? must he unbar? must we unbar? must you unbar? must they unbar?
V-ing form
must I be unbarring? must you be unbarring? must he be unbarring? must we be unbarring? must you be unbarring? must they be unbarring?
Perfect
must I have unbarred? must you have unbarred? must he have unbarred? must we have unbarred? must you have unbarred? must they have unbarred?
V-ing perfect
must I have been unbarring? must you have been unbarring? must he have been unbarring? must we have been unbarring? must you have been unbarring? must they have been unbarring?
Interro-negative form
Simple form
must I not unbar? must you not unbar? must he not unbar? must we not unbar? must you not unbar? must they not unbar?
V-ing form
must I not be unbarring? must you not be unbarring? must he not be unbarring? must we not be unbarring? must you not be unbarring? must they not be unbarring?
Perfect
must I not have unbarred? must you not have unbarred? must he not have unbarred? must we not have unbarred? must you not have unbarred? must they not have unbarred?
V-ing perfect
must I not have been unbarring? must you not have been unbarring? must he not have been unbarring? must we not have been unbarring? must you not have been unbarring? must they not have been unbarring?