I must sport you must sport she must sport we must sport you must sport they must sport
V-ing form
I must be sporting you must be sporting she must be sporting we must be sporting you must be sporting they must be sporting
Perfect
I must have sported you must have sported she 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 she 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 she 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 she 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 she 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 she 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 she sport? must we sport? must you sport? must they sport?
V-ing form
must I be sporting? must you be sporting? must she be sporting? must we be sporting? must you be sporting? must they be sporting?
Perfect
must I have sported? must you have sported? must she 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 she 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 she 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 she 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 she 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 she have been sporting? mustn't we have been sporting? mustn't you have been sporting? mustn't they have been sporting?