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