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