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