I ought to forget you ought to forget she ought to forget we ought to forget you ought to forget they ought to forget
V-ing form
I ought to be forgetting you ought to be forgetting she ought to be forgetting we ought to be forgetting you ought to be forgetting they ought to be forgetting
Perfect
I ought to have forgotten you ought to have forgotten she ought to have forgotten we ought to have forgotten you ought to have forgotten they ought to have forgotten
V-ing perfect
I ought to have been forgetting you ought to have been forgetting she ought to have been forgetting we ought to have been forgetting you ought to have been forgetting they ought to have been forgetting
Negation
Simple form
I oughtn't to forget you oughtn't to forget she oughtn't to forget we oughtn't to forget you oughtn't to forget they oughtn't to forget
V-ing form
I oughtn't to be forgetting you oughtn't to be forgetting she oughtn't to be forgetting we oughtn't to be forgetting you oughtn't to be forgetting they oughtn't to be forgetting
Perfect
I oughtn't to have forgotten you oughtn't to have forgotten she oughtn't to have forgotten we oughtn't to have forgotten you oughtn't to have forgotten they oughtn't to have forgotten
V-ing perfect
I oughtn't to have been forgetting you oughtn't to have been forgetting she oughtn't to have been forgetting we oughtn't to have been forgetting you oughtn't to have been forgetting they oughtn't to have been forgetting
Interrogative form
Simple form
ought to I forget? ought to you forget? ought to she forget? ought to we forget? ought to you forget? ought to they forget?
V-ing form
ought to I be forgetting? ought to you be forgetting? ought to she be forgetting? ought to we be forgetting? ought to you be forgetting? ought to they be forgetting?
Perfect
ought to I have forgotten? ought to you have forgotten? ought to she have forgotten? ought to we have forgotten? ought to you have forgotten? ought to they have forgotten?
V-ing perfect
ought to I have been forgetting? ought to you have been forgetting? ought to she have been forgetting? ought to we have been forgetting? ought to you have been forgetting? ought to they have been forgetting?
Interro-negative form
Simple form
oughtn't I to forget? oughtn't you to forget? oughtn't she to forget? oughtn't we to forget? oughtn't you to forget? oughtn't they to forget?
V-ing form
oughtn't I to be forgetting? oughtn't you to be forgetting? oughtn't she to be forgetting? oughtn't we to be forgetting? oughtn't you to be forgetting? oughtn't they to be forgetting?
Perfect
oughtn't I to have forgotten? oughtn't you to have forgotten? oughtn't she to have forgotten? oughtn't we to have forgotten? oughtn't you to have forgotten? oughtn't they to have forgotten?
V-ing perfect
oughtn't I to have been forgetting? oughtn't you to have been forgetting? oughtn't she to have been forgetting? oughtn't we to have been forgetting? oughtn't you to have been forgetting? oughtn't they to have been forgetting?