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