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