English verb conjugation
COULD UNDERPRICE

Regular verb: underprice - underpriced - underpriced

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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