English verb conjugation
SHALL UNDERESTIMATE

Regular verb: underestimate - underestimated - underestimated

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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