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