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