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