English verb conjugation
MIGHT UNDERESTIMATE

Regular verb: underestimate - underestimated - underestimated

Affirmation

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

Negation

Simple form	V-ing form
I mightn't underestimate you mightn't underestimate he mightn't underestimate we mightn't underestimate you mightn't underestimate they mightn't underestimate	I mightn't be underestimating you mightn't be underestimating he mightn't be underestimating we mightn't be underestimating you mightn't be underestimating they mightn't be underestimating
Perfect	V-ing perfect
I mightn't have underestimated you mightn't have underestimated he mightn't have underestimated we mightn't have underestimated you mightn't have underestimated they mightn't have underestimated	I mightn't have been underestimating you mightn't have been underestimating he mightn't have been underestimating we mightn't have been underestimating you mightn't have been underestimating they mightn't have been underestimating

Interrogative form

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

Interro-negative form

Simple form	V-ing form
mightn't I underestimate? mightn't you underestimate? mightn't he underestimate? mightn't we underestimate? mightn't you underestimate? mightn't they underestimate?	mightn't I be underestimating? mightn't you be underestimating? mightn't he be underestimating? mightn't we be underestimating? mightn't you be underestimating? mightn't they be underestimating?
Perfect	V-ing perfect
mightn't I have underestimated? mightn't you have underestimated? mightn't he have underestimated? mightn't we have underestimated? mightn't you have underestimated? mightn't they have underestimated?	mightn't I have been underestimating? mightn't you have been underestimating? mightn't he have been underestimating? mightn't we have been underestimating? mightn't you have been underestimating? mightn't they have been underestimating?