I ought to trek you ought to trek he ought to trek we ought to trek you ought to trek they ought to trek
V-ing form
I ought to be trekking you ought to be trekking he ought to be trekking we ought to be trekking you ought to be trekking they ought to be trekking
Perfect
I ought to have trekked you ought to have trekked he ought to have trekked we ought to have trekked you ought to have trekked they ought to have trekked
V-ing perfect
I ought to have been trekking you ought to have been trekking he ought to have been trekking we ought to have been trekking you ought to have been trekking they ought to have been trekking
Negation
Simple form
I ought not to trek you ought not to trek he ought not to trek we ought not to trek you ought not to trek they ought not to trek
V-ing form
I ought not to trekking you ought not to trekking he ought not to trekking we ought not to trekking you ought not to trekking they ought not to trekking
Perfect
I ought not to have trekked you ought not to have trekked he ought not to have trekked we ought not to have trekked you ought not to have trekked they ought not to have trekked
V-ing perfect
I ought not to have been trekking you ought not to have been trekking he ought not to have been trekking we ought not to have been trekking you ought not to have been trekking they ought not to have been trekking
Interrogative form
Simple form
ought to I trek? ought to you trek? ought to he trek? ought to we trek? ought to you trek? ought to they trek?
V-ing form
ought to I be trekking? ought to you be trekking? ought to he be trekking? ought to we be trekking? ought to you be trekking? ought to they be trekking?
Perfect
ought to I have trekked? ought to you have trekked? ought to he have trekked? ought to we have trekked? ought to you have trekked? ought to they have trekked?
V-ing perfect
ought to I have been trekking? ought to you have been trekking? ought to he have been trekking? ought to we have been trekking? ought to you have been trekking? ought to they have been trekking?
Interro-negative form
Simple form
ought I not to trek? ought you not to trek? ought he not to trek? ought we not to trek? ought you not to trek? ought they not to trek?
V-ing form
ought I not to be trekking? ought you not to be trekking? ought he not to be trekking? ought we not to be trekking? ought you not to be trekking? ought they not to be trekking?
Perfect
ought I not to have trekked? ought you not to have trekked? ought he not to have trekked? ought we not to have trekked? ought you not to have trekked? ought they not to have trekked?
V-ing perfect
ought I not to have been trekking? ought you not to have been trekking? ought he not to have been trekking? ought we not to have been trekking? ought you not to have been trekking? ought they not to have been trekking?