can underrun
Verbe irrégulier : underrun - underran- underrun

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can underrun
you can underrun
she can underrun
we can underrun
you can underrun
they can underrun 	I can be underruning
you can be underruning
she can be underruning
we can be underruning
you can be underruning
they can be underruning	I can have underrun
you can have underrun
she can have underrun
we can have underrun
you can have underrun
they can have underrun	I can have been underruning
you can have been underruning
she can have been underruning
we can have been underruning
you can have been underruning
they can have been underruning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I cannot underrun
you cannot underrun
she cannot underrun
we cannot underrun
you cannot underrun
they cannot underrun 	I cannot be underruning
you cannot be underruning
she cannot be underruning
we cannot be underruning
you cannot be underruning
they cannot be underruning	I cannot have underrun
you cannot have underrun
she cannot have underrun
we cannot have underrun
you cannot have underrun
they cannot have underrun	I cannot have been underruning
you cannot have been underruning
she cannot have been underruning
we cannot have been underruning
you cannot have been underruning
they cannot have been underruning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I underrun?
can you underrun?
can she underrun?
can we underrun?
can you underrun?
can they underrun? 	can I be underruning?
can you be underruning?
can she be underruning?
can we be underruning?
can you be underruning?
can they be underruning? 	can I have underrun?
can you have underrun?
can she have underrun?
can we have underrun?
can you have underrun?
can they have underrun? 	can I have been underruning?
can you have been underruning?
can she have been underruning?
can we have been underruning?
can you have been underruning?
can they have been underruning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I not underrun?
can you not underrun?
can she not underrun?
can we not underrun?
can you not underrun?
can they not underrun? 	can I not be underruning?
can you not be underruning?
can she not be underruning?
can we not be underruning?
can you not be underruning?
can they not be underruning? 	can I not have underrun?
can you not have underrun?
can she not have underrun?
can we not have underrun?
can you not have underrun?
can they not have underrun? 	can I not have been underruning?
can you not have been underruning?
can she not have been underruning?
can we not have been underruning?
can you not have been underruning?
can they not have been underruning?