English verb conjugation
WOULD UNDERESTIMATE

Regular verb: underestimate - underestimated - underestimated

Affirmation

Simple form	V-ing form
I would underestimate you would underestimate he would underestimate we would underestimate you would underestimate they would underestimate	I would be underestimating you would be underestimating he would be underestimating we would be underestimating you would be underestimating they would be underestimating
Perfect	V-ing perfect
I would have underestimated you would have underestimated he would have underestimated we would have underestimated you would have underestimated they would have underestimated	I would have been underestimating you would have been underestimating he would have been underestimating we would have been underestimating you would have been underestimating they would have been underestimating

Negation

Simple form	V-ing form
I would not underestimate you would not underestimate he would not underestimate we would not underestimate you would not underestimate they would not underestimate	I would not be underestimating you would not be underestimating he would not be underestimating we would not be underestimating you would not be underestimating they would not be underestimating
Perfect	V-ing perfect
I would not have underestimated you would not have underestimated he would not have underestimated we would not have underestimated you would not have underestimated they would not have underestimated	I would not have been underestimating you would not have been underestimating he would not have been underestimating we would not have been underestimating you would not have been underestimating they would not have been underestimating

Interrogative form

Simple form	V-ing form
would I underestimate? would you underestimate? would he underestimate? would we underestimate? would you underestimate? would they underestimate?	would I be underestimating? would you be underestimating? would he be underestimating? would we be underestimating? would you be underestimating? would they be underestimating?
Perfect	V-ing perfect
would I have underestimated? would you have underestimated? would he have underestimated? would we have underestimated? would you have underestimated? would they have underestimated?	would I have been underestimating? would you have been underestimating? would he have been underestimating? would we have been underestimating? would you have been underestimating? would they have been underestimating?

Interro-negative form

Simple form	V-ing form
would I not underestimate? would you not underestimate? would he not underestimate? would we not underestimate? would you not underestimate? would they not underestimate?	would I not be underestimating? would you not be underestimating? would he not be underestimating? would we not be underestimating? would you not be underestimating? would they not be underestimating?
Perfect	V-ing perfect
would I not have underestimated? would you not have underestimated? would he not have underestimated? would we not have underestimated? would you not have underestimated? would they not have underestimated?	would I not have been underestimating? would you not have been underestimating? would he not have been underestimating? would we not have been underestimating? would you not have been underestimating? would they not have been underestimating?