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