English verb conjugation
OUGHT TO STACK

Regular verb: stack - stacked - stacked

Affirmation

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

Negation

Simple form	V-ing form
I oughtn't to stack you oughtn't to stack she oughtn't to stack we oughtn't to stack you oughtn't to stack they oughtn't to stack	I oughtn't to be stacking you oughtn't to be stacking she oughtn't to be stacking we oughtn't to be stacking you oughtn't to be stacking they oughtn't to be stacking
Perfect	V-ing perfect
I oughtn't to have stacked you oughtn't to have stacked she oughtn't to have stacked we oughtn't to have stacked you oughtn't to have stacked they oughtn't to have stacked	I oughtn't to have been stacking you oughtn't to have been stacking she oughtn't to have been stacking we oughtn't to have been stacking you oughtn't to have been stacking they oughtn't to have been stacking

Interrogative form

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

Interro-negative form

Simple form	V-ing form
oughtn't I to stack? oughtn't you to stack? oughtn't she to stack? oughtn't we to stack? oughtn't you to stack? oughtn't they to stack?	oughtn't I to be stacking? oughtn't you to be stacking? oughtn't she to be stacking? oughtn't we to be stacking? oughtn't you to be stacking? oughtn't they to be stacking?
Perfect	V-ing perfect
oughtn't I to have stacked? oughtn't you to have stacked? oughtn't she to have stacked? oughtn't we to have stacked? oughtn't you to have stacked? oughtn't they to have stacked?	oughtn't I to have been stacking? oughtn't you to have been stacking? oughtn't she to have been stacking? oughtn't we to have been stacking? oughtn't you to have been stacking? oughtn't they to have been stacking?