English verb conjugation
COULD UNDERVALUE

Regular verb: undervalue - undervalued - undervalued

Affirmation

Simple form	V-ing form
I could undervalue you could undervalue he could undervalue we could undervalue you could undervalue they could undervalue	I could be undervaluing you could be undervaluing he could be undervaluing we could be undervaluing you could be undervaluing they could be undervaluing
Perfect	V-ing perfect
I could have undervalued you could have undervalued he could have undervalued we could have undervalued you could have undervalued they could have undervalued	I could have been undervaluing you could have been undervaluing he could have been undervaluing we could have been undervaluing you could have been undervaluing they could have been undervaluing

Negation

Simple form	V-ing form
I could not undervalue you could not undervalue he could not undervalue we could not undervalue you could not undervalue they could not undervalue	I could not be undervaluing you could not be undervaluing he could not be undervaluing we could not be undervaluing you could not be undervaluing they could not be undervaluing
Perfect	V-ing perfect
I could not have undervalued you could not have undervalued he could not have undervalued we could not have undervalued you could not have undervalued they could not have undervalued	I could not have been undervaluing you could not have been undervaluing he could not have been undervaluing we could not have been undervaluing you could not have been undervaluing they could not have been undervaluing

Interrogative form

Simple form	V-ing form
could I undervalue? could you undervalue? could he undervalue? could we undervalue? could you undervalue? could they undervalue?	could I be undervaluing? could you be undervaluing? could he be undervaluing? could we be undervaluing? could you be undervaluing? could they be undervaluing?
Perfect	V-ing perfect
could I have undervalued? could you have undervalued? could he have undervalued? could we have undervalued? could you have undervalued? could they have undervalued?	could I have been undervaluing? could you have been undervaluing? could he have been undervaluing? could we have been undervaluing? could you have been undervaluing? could they have been undervaluing?

Interro-negative form

Simple form	V-ing form
could I not undervalue? could you not undervalue? could he not undervalue? could we not undervalue? could you not undervalue? could they not undervalue?	could I not be undervaluing? could you not be undervaluing? could he not be undervaluing? could we not be undervaluing? could you not be undervaluing? could they not be undervaluing?
Perfect	V-ing perfect
could I not have undervalued? could you not have undervalued? could he not have undervalued? could we not have undervalued? could you not have undervalued? could they not have undervalued?	could I not have been undervaluing? could you not have been undervaluing? could he not have been undervaluing? could we not have been undervaluing? could you not have been undervaluing? could they not have been undervaluing?