don't I refuel? don't you refuel? doesn't she refuel? don't we refuel? don't you refuel? don't they refuel?
Present continuous
am I not refuelling? aren't you refuelling? isn't she refuelling? aren't we refuelling? aren't you refuelling? aren't they refuelling?
Preterite
didn't I refuel? didn't you refuel? didn't she refuel? didn't we refuel? didn't you refuel? didn't they refuel?
Preterite continuous
wasn't I refuelling? weren't you refuelling? wasn't she refuelling? weren't we refuelling? weren't you refuelling? weren't they refuelling?
Present perfect
haven't I refuelled? haven't you refuelled? hasn't she refuelled? haven't we refuelled? haven't you refuelled? haven't they refuelled?
Present perfect continuous
haven't I been refuelling? haven't you been refuelling? hasn't she been refuelling? haven't we been refuelling? haven't you been refuelling? haven't they been refuelling?
Pluperfect
hadn't I refuelled? hadn't you refuelled? hadn't she refuelled? hadn't we refuelled? hadn't you refuelled? hadn't they refuelled?
Pluperfect continuous
hadn't I been refuelling? hadn't you been refuelling? hadn't she been refuelling? hadn't we been refuelling? hadn't you been refuelling? hadn't they been refuelling?
Future
won't I refuel? won't you refuel? won't she refuel? won't we refuel? won't you refuel? won't they refuel?
Future continuous
won't I be refuelling? won't you be refuelling? won't she be refuelling? won't we be refuelling? won't you be refuelling? won't they be refuelling?
Future perfect
won't I have refuelled? won't you have refuelled? won't she have refuelled? won't we have refuelled? won't you have refuelled? won't they have refuelled?
Future perfect continuous
won't I have been refuelling? won't you have been refuelling? won't she have been refuelling? won't we have been refuelling? won't you have been refuelling? won't they have been refuelling?
Conditional
Present
wouldn't I refuel? wouldn't you refuel? wouldn't she refuel? wouldn't we refuel? wouldn't you refuel? wouldn't they refuel?
Present continuous
wouldn't I be refuelling? wouldn't you be refuelling? wouldn't she be refuelling? wouldn't we be refuelling? wouldn't you be refuelling? wouldn't they be refuelling?
Past
wouldn't I have refuelled? wouldn't you have refuelled? wouldn't she have refuelled? wouldn't we have refuelled? wouldn't you have refuelled? wouldn't they have refuelled?
Past continuous
wouldn't I have been refuelling? wouldn't you have been refuelling? wouldn't she have been refuelling? wouldn't we have been refuelling? wouldn't you have been refuelling? wouldn't they have been refuelling?