I must sport you must sport he must sport we must sport you must sport they must sport
V-ing form
I must be sporting you must be sporting he must be sporting we must be sporting you must be sporting they must be sporting
Perfect
I must have sported you must have sported he must have sported we must have sported you must have sported they must have sported
V-ing perfect
I must have been sporting you must have been sporting he must have been sporting we must have been sporting you must have been sporting they must have been sporting
Negation
Simple form
I mustn't sport you mustn't sport he mustn't sport we mustn't sport you mustn't sport they mustn't sport
V-ing form
I mustn't be sporting you mustn't be sporting he mustn't be sporting we mustn't be sporting you mustn't be sporting they mustn't be sporting
Perfect
I mustn't have sported you mustn't have sported he mustn't have sported we mustn't have sported you mustn't have sported they mustn't have sported
V-ing perfect
I mustn't have been sporting you mustn't have been sporting he mustn't have been sporting we mustn't have been sporting you mustn't have been sporting they mustn't have been sporting
Interrogative form
Simple form
must I sport? must you sport? must he sport? must we sport? must you sport? must they sport?
V-ing form
must I be sporting? must you be sporting? must he be sporting? must we be sporting? must you be sporting? must they be sporting?
Perfect
must I have sported? must you have sported? must he have sported? must we have sported? must you have sported? must they have sported?
V-ing perfect
must I have been sporting? must you have been sporting? must he have been sporting? must we have been sporting? must you have been sporting? must they have been sporting?
Interro-negative form
Simple form
mustn't I sport? mustn't you sport? mustn't he sport? mustn't we sport? mustn't you sport? mustn't they sport?
V-ing form
mustn't I be sporting? mustn't you be sporting? mustn't he be sporting? mustn't we be sporting? mustn't you be sporting? mustn't they be sporting?
Perfect
mustn't I have sported? mustn't you have sported? mustn't he have sported? mustn't we have sported? mustn't you have sported? mustn't they have sported?
V-ing perfect
mustn't I have been sporting? mustn't you have been sporting? mustn't he have been sporting? mustn't we have been sporting? mustn't you have been sporting? mustn't they have been sporting?