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