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