English verb conjugation
CAN UNDERPRICE

Regular verb: underprice - underpriced - underpriced

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?