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