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