I must bugle you must bugle he must bugle we must bugle you must bugle they must bugle
V-ing form
I must be bugling you must be bugling he must be bugling we must be bugling you must be bugling they must be bugling
Perfect
I must have bugled you must have bugled he must have bugled we must have bugled you must have bugled they must have bugled
V-ing perfect
I must have been bugling you must have been bugling he must have been bugling we must have been bugling you must have been bugling they must have been bugling
Negation
Simple form
I must not bugle you must not bugle he must not bugle we must not bugle you must not bugle they must not bugle
V-ing form
I must not be bugling you must not be bugling he must not be bugling we must not be bugling you must not be bugling they must not be bugling
Perfect
I must not have bugled you must not have bugled he must not have bugled we must not have bugled you must not have bugled they must not have bugled
V-ing perfect
I must not have been bugling you must not have been bugling he must not have been bugling we must not have been bugling you must not have been bugling they must not have been bugling
Interrogative form
Simple form
must I bugle? must you bugle? must he bugle? must we bugle? must you bugle? must they bugle?
V-ing form
must I be bugling? must you be bugling? must he be bugling? must we be bugling? must you be bugling? must they be bugling?
Perfect
must I have bugled? must you have bugled? must he have bugled? must we have bugled? must you have bugled? must they have bugled?
V-ing perfect
must I have been bugling? must you have been bugling? must he have been bugling? must we have been bugling? must you have been bugling? must they have been bugling?
Interro-negative form
Simple form
must I not bugle? must you not bugle? must he not bugle? must we not bugle? must you not bugle? must they not bugle?
V-ing form
must I not be bugling? must you not be bugling? must he not be bugling? must we not be bugling? must you not be bugling? must they not be bugling?
Perfect
must I not have bugled? must you not have bugled? must he not have bugled? must we not have bugled? must you not have bugled? must they not have bugled?
V-ing perfect
must I not have been bugling? must you not have been bugling? must he not have been bugling? must we not have been bugling? must you not have been bugling? must they not have been bugling?