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