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