can underrun
Irregular verb: underrun - underran- underrun

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can underrun
you can underrun
he can underrun
we can underrun
you can underrun
they can underrun 	I can be underruning
you can be underruning
he can be underruning
we can be underruning
you can be underruning
they can be underruning	I can have underrun
you can have underrun
he 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
he can have been underruning
we can have been underruning
you can have been underruning
they can have been underruning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot underrun
you cannot underrun
he cannot underrun
we cannot underrun
you cannot underrun
they cannot underrun 	I cannot be underruning
you cannot be underruning
he cannot be underruning
we cannot be underruning
you cannot be underruning
they cannot be underruning	I cannot have underrun
you cannot have underrun
he 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
he cannot have been underruning
we cannot have been underruning
you cannot have been underruning
they cannot have been underruning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I underrun?
can you underrun?
can he underrun?
can we underrun?
can you underrun?
can they underrun? 	can I be underruning?
can you be underruning?
can he be underruning?
can we be underruning?
can you be underruning?
can they be underruning? 	can I have underrun?
can you have underrun?
can he 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 he have been underruning?
can we have been underruning?
can you have been underruning?
can they have been underruning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not underrun?
can you not underrun?
can he 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 he 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 he 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 he not have been underruning?
can we not have been underruning?
can you not have been underruning?
can they not have been underruning?