Conjugación del verbo inglés
MUST UNDERRUN

Verbo irregular: underrun - underran - underrun

Afirmación

Forma simple	Forma con V-ing
I must underrun you must underrun he must underrun we must underrun you must underrun they must underrun	I must be underruning you must be underruning he must be underruning we must be underruning you must be underruning they must be underruning
Perfecto	Perfecto con V-ing
I must have underrun you must have underrun he must have underrun we must have underrun you must have underrun they must have underrun	I must have been underruning you must have been underruning he must have been underruning we must have been underruning you must have been underruning they must have been underruning

Negación

Forma simple	Forma con V-ing
I must not underrun you must not underrun he must not underrun we must not underrun you must not underrun they must not underrun	I must not be underruning you must not be underruning he must not be underruning we must not be underruning you must not be underruning they must not be underruning
Perfecto	Perfecto con V-ing
I must not have underrun you must not have underrun he must not have underrun we must not have underrun you must not have underrun they must not have underrun	I must not have been underruning you must not have been underruning he must not have been underruning we must not have been underruning you must not have been underruning they must not have been underruning

Forma interrogativa

Forma simple	Forma con V-ing
must I underrun? must you underrun? must he underrun? must we underrun? must you underrun? must they underrun?	must I be underruning? must you be underruning? must he be underruning? must we be underruning? must you be underruning? must they be underruning?
Perfecto	Perfecto con V-ing
must I have underrun? must you have underrun? must he have underrun? must we have underrun? must you have underrun? must they have underrun?	must I have been underruning? must you have been underruning? must he have been underruning? must we have been underruning? must you have been underruning? must they have been underruning?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not underrun? must you not underrun? must he not underrun? must we not underrun? must you not underrun? must they not underrun?	must I not be underruning? must you not be underruning? must he not be underruning? must we not be underruning? must you not be underruning? must they not be underruning?
Perfecto	Perfecto con V-ing
must I not have underrun? must you not have underrun? must he not have underrun? must we not have underrun? must you not have underrun? must they not have underrun?	must I not have been underruning? must you not have been underruning? must he not have been underruning? must we not have been underruning? must you not have been underruning? must they not have been underruning?