I ought to refuel you ought to refuel she 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 she 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 she 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 she 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 oughtn't to refuel you oughtn't to refuel she oughtn't to refuel we oughtn't to refuel you oughtn't to refuel they oughtn't to refuel
V-ing form
I oughtn't to be refuelling you oughtn't to be refuelling she oughtn't to be refuelling we oughtn't to be refuelling you oughtn't to be refuelling they oughtn't to be refuelling
Perfect
I oughtn't to have refuelled you oughtn't to have refuelled she oughtn't to have refuelled we oughtn't to have refuelled you oughtn't to have refuelled they oughtn't to have refuelled
V-ing perfect
I oughtn't to have been refuelling you oughtn't to have been refuelling she oughtn't to have been refuelling we oughtn't to have been refuelling you oughtn't to have been refuelling they oughtn't to have been refuelling
Interrogative form
Simple form
ought to I refuel? ought to you refuel? ought to she 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 she 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 she 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 she 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
oughtn't I to refuel? oughtn't you to refuel? oughtn't she to refuel? oughtn't we to refuel? oughtn't you to refuel? oughtn't they to refuel?
V-ing form
oughtn't I to be refuelling? oughtn't you to be refuelling? oughtn't she to be refuelling? oughtn't we to be refuelling? oughtn't you to be refuelling? oughtn't they to be refuelling?
Perfect
oughtn't I to have refuelled? oughtn't you to have refuelled? oughtn't she to have refuelled? oughtn't we to have refuelled? oughtn't you to have refuelled? oughtn't they to have refuelled?
V-ing perfect
oughtn't I to have been refuelling? oughtn't you to have been refuelling? oughtn't she to have been refuelling? oughtn't we to have been refuelling? oughtn't you to have been refuelling? oughtn't they to have been refuelling?