can underprice
Regular verb: underprice - underpriced- underpriced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can underprice
you can underprice
he can underprice
we can underprice
you can underprice
they can underprice 	I can be underpricing
you can be underpricing
he can be underpricing
we can be underpricing
you can be underpricing
they can be underpricing	I can have underpriced
you can have underpriced
he can have underpriced
we can have underpriced
you can have underpriced
they can have underpriced	I can have been underpricing
you can have been underpricing
he can have been underpricing
we can have been underpricing
you can have been underpricing
they can have been underpricing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot underprice
you cannot underprice
he cannot underprice
we cannot underprice
you cannot underprice
they cannot underprice 	I cannot be underpricing
you cannot be underpricing
he cannot be underpricing
we cannot be underpricing
you cannot be underpricing
they cannot be underpricing	I cannot have underpriced
you cannot have underpriced
he cannot have underpriced
we cannot have underpriced
you cannot have underpriced
they cannot have underpriced	I cannot have been underpricing
you cannot have been underpricing
he cannot have been underpricing
we cannot have been underpricing
you cannot have been underpricing
they cannot have been underpricing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I underprice?
can you underprice?
can he underprice?
can we underprice?
can you underprice?
can they underprice? 	can I be underpricing?
can you be underpricing?
can he be underpricing?
can we be underpricing?
can you be underpricing?
can they be underpricing? 	can I have underpriced?
can you have underpriced?
can he have underpriced?
can we have underpriced?
can you have underpriced?
can they have underpriced? 	can I have been underpricing?
can you have been underpricing?
can he have been underpricing?
can we have been underpricing?
can you have been underpricing?
can they have been underpricing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not underprice?
can you not underprice?
can he not underprice?
can we not underprice?
can you not underprice?
can they not underprice? 	can I not be underpricing?
can you not be underpricing?
can he not be underpricing?
can we not be underpricing?
can you not be underpricing?
can they not be underpricing? 	can I not have underpriced?
can you not have underpriced?
can he not have underpriced?
can we not have underpriced?
can you not have underpriced?
can they not have underpriced? 	can I not have been underpricing?
can you not have been underpricing?
can he not have been underpricing?
can we not have been underpricing?
can you not have been underpricing?
can they not have been underpricing?