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