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 ought not to tree you ought not to tree she ought not to tree we ought not to tree you ought not to tree they ought not to tree
V-ing form
I ought not to treeing you ought not to treeing she ought not to treeing we ought not to treeing you ought not to treeing they ought not to treeing
Perfect
I ought not to have treed you ought not to have treed she ought not to have treed we ought not to have treed you ought not to have treed they ought not to have treed
V-ing perfect
I ought not to have been treeing you ought not to have been treeing she ought not to have been treeing we ought not to have been treeing you ought not to have been treeing they ought not 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
ought I not to tree? ought you not to tree? ought she not to tree? ought we not to tree? ought you not to tree? ought they not to tree?
V-ing form
ought I not to be treeing? ought you not to be treeing? ought she not to be treeing? ought we not to be treeing? ought you not to be treeing? ought they not to be treeing?
Perfect
ought I not to have treed? ought you not to have treed? ought she not to have treed? ought we not to have treed? ought you not to have treed? ought they not to have treed?
V-ing perfect
ought I not to have been treeing? ought you not to have been treeing? ought she not to have been treeing? ought we not to have been treeing? ought you not to have been treeing? ought they not to have been treeing?