I must dance you must dance she must dance we must dance you must dance they must dance
V-ing form
I must be dancing you must be dancing she must be dancing we must be dancing you must be dancing they must be dancing
Perfect
I must have danced you must have danced she must have danced we must have danced you must have danced they must have danced
V-ing perfect
I must have been dancing you must have been dancing she must have been dancing we must have been dancing you must have been dancing they must have been dancing
Negation
Simple form
I mustn't dance you mustn't dance she mustn't dance we mustn't dance you mustn't dance they mustn't dance
V-ing form
I mustn't be dancing you mustn't be dancing she mustn't be dancing we mustn't be dancing you mustn't be dancing they mustn't be dancing
Perfect
I mustn't have danced you mustn't have danced she mustn't have danced we mustn't have danced you mustn't have danced they mustn't have danced
V-ing perfect
I mustn't have been dancing you mustn't have been dancing she mustn't have been dancing we mustn't have been dancing you mustn't have been dancing they mustn't have been dancing
Interrogative form
Simple form
must I dance? must you dance? must she dance? must we dance? must you dance? must they dance?
V-ing form
must I be dancing? must you be dancing? must she be dancing? must we be dancing? must you be dancing? must they be dancing?
Perfect
must I have danced? must you have danced? must she have danced? must we have danced? must you have danced? must they have danced?
V-ing perfect
must I have been dancing? must you have been dancing? must she have been dancing? must we have been dancing? must you have been dancing? must they have been dancing?
Interro-negative form
Simple form
mustn't I dance? mustn't you dance? mustn't she dance? mustn't we dance? mustn't you dance? mustn't they dance?
V-ing form
mustn't I be dancing? mustn't you be dancing? mustn't she be dancing? mustn't we be dancing? mustn't you be dancing? mustn't they be dancing?
Perfect
mustn't I have danced? mustn't you have danced? mustn't she have danced? mustn't we have danced? mustn't you have danced? mustn't they have danced?
V-ing perfect
mustn't I have been dancing? mustn't you have been dancing? mustn't she have been dancing? mustn't we have been dancing? mustn't you have been dancing? mustn't they have been dancing?