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