Verbo regular: concentrate - concentrated - concentrated
Indicativo
Presente
don't I concentrate? don't you concentrate? doesn't he concentrate? don't we concentrate? don't you concentrate? don't they concentrate?
Presente continuo
am I not concentrating? aren't you concentrating? isn't he concentrating? aren't we concentrating? aren't you concentrating? aren't they concentrating?
Pretérito
didn't I concentrate? didn't you concentrate? didn't he concentrate? didn't we concentrate? didn't you concentrate? didn't they concentrate?
Pretérito continuo
wasn't I concentrating? weren't you concentrating? wasn't he concentrating? weren't we concentrating? weren't you concentrating? weren't they concentrating?
Presente perfecto
haven't I concentrated? haven't you concentrated? hasn't he concentrated? haven't we concentrated? haven't you concentrated? haven't they concentrated?
Presente perfecto continuo
haven't I been concentrating? haven't you been concentrating? hasn't he been concentrating? haven't we been concentrating? haven't you been concentrating? haven't they been concentrating?
Pluscuamperfecto
hadn't I concentrated? hadn't you concentrated? hadn't he concentrated? hadn't we concentrated? hadn't you concentrated? hadn't they concentrated?
Pluscuamperfecto continuo
hadn't I been concentrating? hadn't you been concentrating? hadn't he been concentrating? hadn't we been concentrating? hadn't you been concentrating? hadn't they been concentrating?
Futuro simple
won't I concentrate? won't you concentrate? won't he concentrate? won't we concentrate? won't you concentrate? won't they concentrate?
Futuro continuo
won't I be concentrating? won't you be concentrating? won't he be concentrating? won't we be concentrating? won't you be concentrating? won't they be concentrating?
Futuro perfecto
won't I have concentrated? won't you have concentrated? won't he have concentrated? won't we have concentrated? won't you have concentrated? won't they have concentrated?
Futuro perfecto contínuo
won't I have been concentrating? won't you have been concentrating? won't he have been concentrating? won't we have been concentrating? won't you have been concentrating? won't they have been concentrating?
Condicional
Presente
wouldn't I concentrate? wouldn't you concentrate? wouldn't he concentrate? wouldn't we concentrate? wouldn't you concentrate? wouldn't they concentrate?
Presente continuo
wouldn't I be concentrating? wouldn't you be concentrating? wouldn't he be concentrating? wouldn't we be concentrating? wouldn't you be concentrating? wouldn't they be concentrating?
Passado
wouldn't I have concentrated? wouldn't you have concentrated? wouldn't he have concentrated? wouldn't we have concentrated? wouldn't you have concentrated? wouldn't they have concentrated?
Passado continuo
wouldn't I have been concentrating? wouldn't you have been concentrating? wouldn't he have been concentrating? wouldn't we have been concentrating? wouldn't you have been concentrating? wouldn't they have been concentrating?