English verb conjugation
CAN UNDERVALUE

Regular verb: undervalue - undervalued - undervalued

Affirmation

Simple form	V-ing form
I can undervalue you can undervalue she can undervalue we can undervalue you can undervalue they can undervalue	I can be undervaluing you can be undervaluing she 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 she 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 she 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 can't undervalue you can't undervalue she can't undervalue we can't undervalue you can't undervalue they can't undervalue	I can't be undervaluing you can't be undervaluing she can't be undervaluing we can't be undervaluing you can't be undervaluing they can't be undervaluing
Perfect	V-ing perfect
I can't have undervalued you can't have undervalued she can't have undervalued we can't have undervalued you can't have undervalued they can't have undervalued	I can't have been undervaluing you can't have been undervaluing she can't have been undervaluing we can't have been undervaluing you can't have been undervaluing they can't have been undervaluing

Interrogative form

Simple form	V-ing form
can I undervalue? can you undervalue? can she undervalue? can we undervalue? can you undervalue? can they undervalue?	can I be undervaluing? can you be undervaluing? can she 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 she 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 she 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't I undervalue? can't you undervalue? can't she undervalue? can't we undervalue? can't you undervalue? can't they undervalue?	can't I be undervaluing? can't you be undervaluing? can't she be undervaluing? can't we be undervaluing? can't you be undervaluing? can't they be undervaluing?
Perfect	V-ing perfect
can't I have undervalued? can't you have undervalued? can't she have undervalued? can't we have undervalued? can't you have undervalued? can't they have undervalued?	can't I have been undervaluing? can't you have been undervaluing? can't she have been undervaluing? can't we have been undervaluing? can't you have been undervaluing? can't they have been undervaluing?