don't I concentrate? don't you concentrate? doesn't he concentrate? don't we concentrate? don't you concentrate? don't they concentrate?
Präsentieren Sie kontinuierlich
am I not concentrating? aren't you concentrating? isn't he concentrating? aren't we concentrating? aren't you concentrating? aren't they concentrating?
Präteritum
didn't I concentrate? didn't you concentrate? didn't he concentrate? didn't we concentrate? didn't you concentrate? didn't they concentrate?
Präteritum kontinuierlich
wasn't I concentrating? weren't you concentrating? wasn't he concentrating? weren't we concentrating? weren't you concentrating? weren't they concentrating?
Präsens perfekt
haven't I concentrated? haven't you concentrated? hasn't he concentrated? haven't we concentrated? haven't you concentrated? haven't they concentrated?
Präsens perfekt kontinuierlich
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?
Plusquamperfekt
hadn't I concentrated? hadn't you concentrated? hadn't he concentrated? hadn't we concentrated? hadn't you concentrated? hadn't they concentrated?
Pluperfect ununterbrochen
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?
Futur
won't I concentrate? won't you concentrate? won't he concentrate? won't we concentrate? won't you concentrate? won't they concentrate?
Futur kontinuierlich
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?
Futur perfekt
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?
Futur perfekt kontinuierlich
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?
Bedingt
Präsens
wouldn't I concentrate? wouldn't you concentrate? wouldn't he concentrate? wouldn't we concentrate? wouldn't you concentrate? wouldn't they concentrate?
Präsentieren Sie kontinuierlich
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?
Perfekt
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?
Perfekt kontinuierlich
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?