English verb conjugation
SHALL STACK

Regular verb: stack - stacked - stacked

Affirmation

Simple form	V-ing form
I shall stack you shall stack she shall stack we shall stack you shall stack they shall stack	I shall be stacking you shall be stacking she shall be stacking we shall be stacking you shall be stacking they shall be stacking
Perfect	V-ing perfect
I shall have stacked you shall have stacked she shall have stacked we shall have stacked you shall have stacked they shall have stacked	I shall have been stacking you shall have been stacking she shall have been stacking we shall have been stacking you shall have been stacking they shall have been stacking

Negation

Simple form	V-ing form
I shall not stack you shall not stack she shall not stack we shall not stack you shall not stack they shall not stack	I shall not be stacking you shall not be stacking she shall not be stacking we shall not be stacking you shall not be stacking they shall not be stacking
Perfect	V-ing perfect
I shall not have stacked you shall not have stacked she shall not have stacked we shall not have stacked you shall not have stacked they shall not have stacked	I shall not have been stacking you shall not have been stacking she shall not have been stacking we shall not have been stacking you shall not have been stacking they shall not have been stacking

Interrogative form

Simple form	V-ing form
shall I stack? shall you stack? shall she stack? shall we stack? shall you stack? shall they stack?	shall I be stacking? shall you be stacking? shall she be stacking? shall we be stacking? shall you be stacking? shall they be stacking?
Perfect	V-ing perfect
shall I have stacked? shall you have stacked? shall she have stacked? shall we have stacked? shall you have stacked? shall they have stacked?	shall I have been stacking? shall you have been stacking? shall she have been stacking? shall we have been stacking? shall you have been stacking? shall they have been stacking?

Interro-negative form

Simple form	V-ing form
shall I not stack? shall you not stack? shall she not stack? shall we not stack? shall you not stack? shall they not stack?	shall I not be stacking? shall you not be stacking? shall she not be stacking? shall we not be stacking? shall you not be stacking? shall they not be stacking?
Perfect	V-ing perfect
shall I not have stacked? shall you not have stacked? shall she not have stacked? shall we not have stacked? shall you not have stacked? shall they not have stacked?	shall I not have been stacking? shall you not have been stacking? shall she not have been stacking? shall we not have been stacking? shall you not have been stacking? shall they not have been stacking?