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 he 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 he 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 he 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 he 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 oughtn't to underestimate you oughtn't to underestimate he oughtn't to underestimate we oughtn't to underestimate you oughtn't to underestimate they oughtn't to underestimate	I oughtn't to be underestimating you oughtn't to be underestimating he oughtn't to be underestimating we oughtn't to be underestimating you oughtn't to be underestimating they oughtn't to be underestimating
Perfect	V-ing perfect
I oughtn't to have underestimated you oughtn't to have underestimated he oughtn't to have underestimated we oughtn't to have underestimated you oughtn't to have underestimated they oughtn't to have underestimated	I oughtn't to have been underestimating you oughtn't to have been underestimating he oughtn't to have been underestimating we oughtn't to have been underestimating you oughtn't to have been underestimating they oughtn't to have been underestimating

Interrogative form

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