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