English verb conjugation
SHALL THUMBTACK

Regular verb: thumbtack - thumbtacked - thumbtacked

Affirmation

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

Negation

Simple form	V-ing form
I shall not thumbtack you shall not thumbtack he shall not thumbtack we shall not thumbtack you shall not thumbtack they shall not thumbtack	I shall not be thumbtacking you shall not be thumbtacking he shall not be thumbtacking we shall not be thumbtacking you shall not be thumbtacking they shall not be thumbtacking
Perfect	V-ing perfect
I shall not have thumbtacked you shall not have thumbtacked he shall not have thumbtacked we shall not have thumbtacked you shall not have thumbtacked they shall not have thumbtacked	I shall not have been thumbtacking you shall not have been thumbtacking he shall not have been thumbtacking we shall not have been thumbtacking you shall not have been thumbtacking they shall not have been thumbtacking

Interrogative form

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

Interro-negative form

Simple form	V-ing form
shall I not thumbtack? shall you not thumbtack? shall he not thumbtack? shall we not thumbtack? shall you not thumbtack? shall they not thumbtack?	shall I not be thumbtacking? shall you not be thumbtacking? shall he not be thumbtacking? shall we not be thumbtacking? shall you not be thumbtacking? shall they not be thumbtacking?
Perfect	V-ing perfect
shall I not have thumbtacked? shall you not have thumbtacked? shall he not have thumbtacked? shall we not have thumbtacked? shall you not have thumbtacked? shall they not have thumbtacked?	shall I not have been thumbtacking? shall you not have been thumbtacking? shall he not have been thumbtacking? shall we not have been thumbtacking? shall you not have been thumbtacking? shall they not have been thumbtacking?