must question
Verbo regular: question - questioned- questioned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must question
you must question
she must question
we must question
you must question
they must question 	I must be questioning
you must be questioning
she must be questioning
we must be questioning
you must be questioning
they must be questioning	I must have questioned
you must have questioned
she 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
she must have been questioning
we must have been questioning
you must have been questioning
they must have been questioning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not question
you must not question
she must not question
we must not question
you must not question
they must not question 	I must not be questioning
you must not be questioning
she must not be questioning
we must not be questioning
you must not be questioning
they must not be questioning	I must not have questioned
you must not have questioned
she must not have questioned
we must not have questioned
you must not have questioned
they must not have questioned	I must not have been questioning
you must not have been questioning
she must not have been questioning
we must not have been questioning
you must not have been questioning
they must not have been questioning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I question?
must you question?
must she question?
must we question?
must you question?
must they question? 	must I be questioning?
must you be questioning?
must she be questioning?
must we be questioning?
must you be questioning?
must they be questioning? 	must I have questioned?
must you have questioned?
must she 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 she have been questioning?
must we have been questioning?
must you have been questioning?
must they have been questioning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not question?
must you not question?
must she not question?
must we not question?
must you not question?
must they not question? 	must I not be questioning?
must you not be questioning?
must she not be questioning?
must we not be questioning?
must you not be questioning?
must they not be questioning? 	must I not have questioned?
must you not have questioned?
must she not have questioned?
must we not have questioned?
must you not have questioned?
must they not have questioned? 	must I not have been questioning?
must you not have been questioning?
must she not have been questioning?
must we not have been questioning?
must you not have been questioning?
must they not have been questioning?