should underrun
Verbo irregular: underrun - underran- underrun

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

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

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

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