must question
Regular verb: question - questioned- questioned

Affirmation 	
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I must question
you must question
he must question
we must question
you must question
they must question 	I must be questioning
you must be questioning
he must be questioning
we must be questioning
you must be questioning
they must be questioning	I must have questioned
you must have questioned
he must have questioned
we must have questioned
you must have questioned
they must have questioned	I must have been questioning
you must have been questioning
he must have been questioning
we must have been questioning
you must have been questioning
they must have been questioning	

Negation 	
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I mustn't question
you mustn't question
he mustn't question
we mustn't question
you mustn't question
they mustn't question 	I mustn't be questioning
you mustn't be questioning
he mustn't be questioning
we mustn't be questioning
you mustn't be questioning
they mustn't be questioning	I mustn't have questioned
you mustn't have questioned
he mustn't have questioned
we mustn't have questioned
you mustn't have questioned
they mustn't have questioned	I mustn't have been questioning
you mustn't have been questioning
he mustn't have been questioning
we mustn't have been questioning
you mustn't have been questioning
they mustn't have been questioning	

Interrogative form 	
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must I question?
must you question?
must he question?
must we question?
must you question?
must they question? 	must I be questioning?
must you be questioning?
must he be questioning?
must we be questioning?
must you be questioning?
must they be questioning? 	must I have questioned?
must you have questioned?
must he have questioned?
must we have questioned?
must you have questioned?
must they have questioned? 	must I have been questioning?
must you have been questioning?
must he have been questioning?
must we have been questioning?
must you have been questioning?
must they have been questioning? 	

Interro-negative form 	
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mustn't I question?
mustn't you question?
mustn't he question?
mustn't we question?
mustn't you question?
mustn't they question? 	mustn't I be questioning?
mustn't you be questioning?
mustn't he be questioning?
mustn't we be questioning?
mustn't you be questioning?
mustn't they be questioning? 	mustn't I have questioned?
mustn't you have questioned?
mustn't he have questioned?
mustn't we have questioned?
mustn't you have questioned?
mustn't they have questioned? 	mustn't I have been questioning?
mustn't you have been questioning?
mustn't he have been questioning?
mustn't we have been questioning?
mustn't you have been questioning?
mustn't they have been questioning?