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