I must bird-dog you must bird-dog he must bird-dog we must bird-dog you must bird-dog they must bird-dog
V-ing form
I must be bird-doging you must be bird-doging he must be bird-doging we must be bird-doging you must be bird-doging they must be bird-doging
Perfect
I must have bird-doged you must have bird-doged he must have bird-doged we must have bird-doged you must have bird-doged they must have bird-doged
V-ing perfect
I must have been bird-doging you must have been bird-doging he must have been bird-doging we must have been bird-doging you must have been bird-doging they must have been bird-doging
Negation
Simple form
I must not bird-dog you must not bird-dog he must not bird-dog we must not bird-dog you must not bird-dog they must not bird-dog
V-ing form
I must not be bird-doging you must not be bird-doging he must not be bird-doging we must not be bird-doging you must not be bird-doging they must not be bird-doging
Perfect
I must not have bird-doged you must not have bird-doged he must not have bird-doged we must not have bird-doged you must not have bird-doged they must not have bird-doged
V-ing perfect
I must not have been bird-doging you must not have been bird-doging he must not have been bird-doging we must not have been bird-doging you must not have been bird-doging they must not have been bird-doging
Interrogative form
Simple form
must I bird-dog? must you bird-dog? must he bird-dog? must we bird-dog? must you bird-dog? must they bird-dog?
V-ing form
must I be bird-doging? must you be bird-doging? must he be bird-doging? must we be bird-doging? must you be bird-doging? must they be bird-doging?
Perfect
must I have bird-doged? must you have bird-doged? must he have bird-doged? must we have bird-doged? must you have bird-doged? must they have bird-doged?
V-ing perfect
must I have been bird-doging? must you have been bird-doging? must he have been bird-doging? must we have been bird-doging? must you have been bird-doging? must they have been bird-doging?
Interro-negative form
Simple form
must I not bird-dog? must you not bird-dog? must he not bird-dog? must we not bird-dog? must you not bird-dog? must they not bird-dog?
V-ing form
must I not be bird-doging? must you not be bird-doging? must he not be bird-doging? must we not be bird-doging? must you not be bird-doging? must they not be bird-doging?
Perfect
must I not have bird-doged? must you not have bird-doged? must he not have bird-doged? must we not have bird-doged? must you not have bird-doged? must they not have bird-doged?
V-ing perfect
must I not have been bird-doging? must you not have been bird-doging? must he not have been bird-doging? must we not have been bird-doging? must you not have been bird-doging? must they not have been bird-doging?