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