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