I ought to purify you ought to purify he ought to purify we ought to purify you ought to purify they ought to purify
V-ing form
I ought to be purifying you ought to be purifying he ought to be purifying we ought to be purifying you ought to be purifying they ought to be purifying
Perfect
I ought to have purified you ought to have purified he ought to have purified we ought to have purified you ought to have purified they ought to have purified
V-ing perfect
I ought to have been purifying you ought to have been purifying he ought to have been purifying we ought to have been purifying you ought to have been purifying they ought to have been purifying
Negation
Simple form
I oughtn't to purify you oughtn't to purify he oughtn't to purify we oughtn't to purify you oughtn't to purify they oughtn't to purify
V-ing form
I oughtn't to be purifying you oughtn't to be purifying he oughtn't to be purifying we oughtn't to be purifying you oughtn't to be purifying they oughtn't to be purifying
Perfect
I oughtn't to have purified you oughtn't to have purified he oughtn't to have purified we oughtn't to have purified you oughtn't to have purified they oughtn't to have purified
V-ing perfect
I oughtn't to have been purifying you oughtn't to have been purifying he oughtn't to have been purifying we oughtn't to have been purifying you oughtn't to have been purifying they oughtn't to have been purifying
Interrogative form
Simple form
ought to I purify? ought to you purify? ought to he purify? ought to we purify? ought to you purify? ought to they purify?
V-ing form
ought to I be purifying? ought to you be purifying? ought to he be purifying? ought to we be purifying? ought to you be purifying? ought to they be purifying?
Perfect
ought to I have purified? ought to you have purified? ought to he have purified? ought to we have purified? ought to you have purified? ought to they have purified?
V-ing perfect
ought to I have been purifying? ought to you have been purifying? ought to he have been purifying? ought to we have been purifying? ought to you have been purifying? ought to they have been purifying?
Interro-negative form
Simple form
oughtn't I to purify? oughtn't you to purify? oughtn't he to purify? oughtn't we to purify? oughtn't you to purify? oughtn't they to purify?
V-ing form
oughtn't I to be purifying? oughtn't you to be purifying? oughtn't he to be purifying? oughtn't we to be purifying? oughtn't you to be purifying? oughtn't they to be purifying?
Perfect
oughtn't I to have purified? oughtn't you to have purified? oughtn't he to have purified? oughtn't we to have purified? oughtn't you to have purified? oughtn't they to have purified?
V-ing perfect
oughtn't I to have been purifying? oughtn't you to have been purifying? oughtn't he to have been purifying? oughtn't we to have been purifying? oughtn't you to have been purifying? oughtn't they to have been purifying?