English verb conjugation
CAN UNDERVALUE

Regular verb: undervalue - undervalued - undervalued

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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