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