don't I brief? don't you brief? doesn't he brief? don't we brief? don't you brief? don't they brief?
Presente contínuo
am I not briefing? aren't you briefing? isn't he briefing? aren't we briefing? aren't you briefing? aren't they briefing?
Pretérito
didn't I brief? didn't you brief? didn't he brief? didn't we brief? didn't you brief? didn't they brief?
Preterito contínuo
wasn't I briefing? weren't you briefing? wasn't he briefing? weren't we briefing? weren't you briefing? weren't they briefing?
Presente perfeito
haven't I briefed? haven't you briefed? hasn't he briefed? haven't we briefed? haven't you briefed? haven't they briefed?
Presente perfeito contínuo
haven't I been briefing? haven't you been briefing? hasn't he been briefing? haven't we been briefing? haven't you been briefing? haven't they been briefing?
Mais perfeito
hadn't I briefed? hadn't you briefed? hadn't he briefed? hadn't we briefed? hadn't you briefed? hadn't they briefed?
Contínuo mais perfeito
hadn't I been briefing? hadn't you been briefing? hadn't he been briefing? hadn't we been briefing? hadn't you been briefing? hadn't they been briefing?
Futuro
won't I brief? won't you brief? won't he brief? won't we brief? won't you brief? won't they brief?
Futuro contínuo
won't I be briefing? won't you be briefing? won't he be briefing? won't we be briefing? won't you be briefing? won't they be briefing?
futuro perfeito
won't I have briefed? won't you have briefed? won't he have briefed? won't we have briefed? won't you have briefed? won't they have briefed?
futuro perfeito contínuo
won't I have been briefing? won't you have been briefing? won't he have been briefing? won't we have been briefing? won't you have been briefing? won't they have been briefing?
Condicional
Presente
wouldn't I brief? wouldn't you brief? wouldn't he brief? wouldn't we brief? wouldn't you brief? wouldn't they brief?
Presente contínuo
wouldn't I be briefing? wouldn't you be briefing? wouldn't he be briefing? wouldn't we be briefing? wouldn't you be briefing? wouldn't they be briefing?
Passado
wouldn't I have briefed? wouldn't you have briefed? wouldn't he have briefed? wouldn't we have briefed? wouldn't you have briefed? wouldn't they have briefed?
Passado contínuo
wouldn't I have been briefing? wouldn't you have been briefing? wouldn't he have been briefing? wouldn't we have been briefing? wouldn't you have been briefing? wouldn't they have been briefing?