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