I ought to refuel you ought to refuel he ought to refuel we ought to refuel you ought to refuel they ought to refuel
V-ing form
I ought to be refuelling you ought to be refuelling he ought to be refuelling we ought to be refuelling you ought to be refuelling they ought to be refuelling
Perfect
I ought to have refuelled you ought to have refuelled he ought to have refuelled we ought to have refuelled you ought to have refuelled they ought to have refuelled
V-ing perfect
I ought to have been refuelling you ought to have been refuelling he ought to have been refuelling we ought to have been refuelling you ought to have been refuelling they ought to have been refuelling
Negation
Simple form
I ought not to refuel you ought not to refuel he ought not to refuel we ought not to refuel you ought not to refuel they ought not to refuel
V-ing form
I ought not to refuelling you ought not to refuelling he ought not to refuelling we ought not to refuelling you ought not to refuelling they ought not to refuelling
Perfect
I ought not to have refuelled you ought not to have refuelled he ought not to have refuelled we ought not to have refuelled you ought not to have refuelled they ought not to have refuelled
V-ing perfect
I ought not to have been refuelling you ought not to have been refuelling he ought not to have been refuelling we ought not to have been refuelling you ought not to have been refuelling they ought not to have been refuelling
Interrogative form
Simple form
ought to I refuel? ought to you refuel? ought to he refuel? ought to we refuel? ought to you refuel? ought to they refuel?
V-ing form
ought to I be refuelling? ought to you be refuelling? ought to he be refuelling? ought to we be refuelling? ought to you be refuelling? ought to they be refuelling?
Perfect
ought to I have refuelled? ought to you have refuelled? ought to he have refuelled? ought to we have refuelled? ought to you have refuelled? ought to they have refuelled?
V-ing perfect
ought to I have been refuelling? ought to you have been refuelling? ought to he have been refuelling? ought to we have been refuelling? ought to you have been refuelling? ought to they have been refuelling?
Interro-negative form
Simple form
ought I not to refuel? ought you not to refuel? ought he not to refuel? ought we not to refuel? ought you not to refuel? ought they not to refuel?
V-ing form
ought I not to be refuelling? ought you not to be refuelling? ought he not to be refuelling? ought we not to be refuelling? ought you not to be refuelling? ought they not to be refuelling?
Perfect
ought I not to have refuelled? ought you not to have refuelled? ought he not to have refuelled? ought we not to have refuelled? ought you not to have refuelled? ought they not to have refuelled?
V-ing perfect
ought I not to have been refuelling? ought you not to have been refuelling? ought he not to have been refuelling? ought we not to have been refuelling? ought you not to have been refuelling? ought they not to have been refuelling?