English verb conjugation
OUGHT TO UNDERESTIMATE

Regular verb: underestimate - underestimated - underestimated

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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