English verb conjugation
OUGHT TO THUMBTACK

Regular verb: thumbtack - thumbtacked - thumbtacked

Affirmation

Simple form	V-ing form
I ought to thumbtack you ought to thumbtack he ought to thumbtack we ought to thumbtack you ought to thumbtack they ought to thumbtack	I ought to be thumbtacking you ought to be thumbtacking he ought to be thumbtacking we ought to be thumbtacking you ought to be thumbtacking they ought to be thumbtacking
Perfect	V-ing perfect
I ought to have thumbtacked you ought to have thumbtacked he ought to have thumbtacked we ought to have thumbtacked you ought to have thumbtacked they ought to have thumbtacked	I ought to have been thumbtacking you ought to have been thumbtacking he ought to have been thumbtacking we ought to have been thumbtacking you ought to have been thumbtacking they ought to have been thumbtacking

Negation

Simple form	V-ing form
I oughtn't to thumbtack you oughtn't to thumbtack he oughtn't to thumbtack we oughtn't to thumbtack you oughtn't to thumbtack they oughtn't to thumbtack	I oughtn't to be thumbtacking you oughtn't to be thumbtacking he oughtn't to be thumbtacking we oughtn't to be thumbtacking you oughtn't to be thumbtacking they oughtn't to be thumbtacking
Perfect	V-ing perfect
I oughtn't to have thumbtacked you oughtn't to have thumbtacked he oughtn't to have thumbtacked we oughtn't to have thumbtacked you oughtn't to have thumbtacked they oughtn't to have thumbtacked	I oughtn't to have been thumbtacking you oughtn't to have been thumbtacking he oughtn't to have been thumbtacking we oughtn't to have been thumbtacking you oughtn't to have been thumbtacking they oughtn't to have been thumbtacking

Interrogative form

Simple form	V-ing form
ought to I thumbtack? ought to you thumbtack? ought to he thumbtack? ought to we thumbtack? ought to you thumbtack? ought to they thumbtack?	ought to I be thumbtacking? ought to you be thumbtacking? ought to he be thumbtacking? ought to we be thumbtacking? ought to you be thumbtacking? ought to they be thumbtacking?
Perfect	V-ing perfect
ought to I have thumbtacked? ought to you have thumbtacked? ought to he have thumbtacked? ought to we have thumbtacked? ought to you have thumbtacked? ought to they have thumbtacked?	ought to I have been thumbtacking? ought to you have been thumbtacking? ought to he have been thumbtacking? ought to we have been thumbtacking? ought to you have been thumbtacking? ought to they have been thumbtacking?

Interro-negative form

Simple form	V-ing form
oughtn't I to thumbtack? oughtn't you to thumbtack? oughtn't he to thumbtack? oughtn't we to thumbtack? oughtn't you to thumbtack? oughtn't they to thumbtack?	oughtn't I to be thumbtacking? oughtn't you to be thumbtacking? oughtn't he to be thumbtacking? oughtn't we to be thumbtacking? oughtn't you to be thumbtacking? oughtn't they to be thumbtacking?
Perfect	V-ing perfect
oughtn't I to have thumbtacked? oughtn't you to have thumbtacked? oughtn't he to have thumbtacked? oughtn't we to have thumbtacked? oughtn't you to have thumbtacked? oughtn't they to have thumbtacked?	oughtn't I to have been thumbtacking? oughtn't you to have been thumbtacking? oughtn't he to have been thumbtacking? oughtn't we to have been thumbtacking? oughtn't you to have been thumbtacking? oughtn't they to have been thumbtacking?