Warning, this verb may not exist. Conjugation is given as example.
Indicative
Present
don't I enthusiasm? don't you enthusiasm? doesn't he enthusiasm? don't we enthusiasm? don't you enthusiasm? don't they enthusiasm?
Present continuous
am I not enthusiasming? aren't you enthusiasming? isn't he enthusiasming? aren't we enthusiasming? aren't you enthusiasming? aren't they enthusiasming?
Preterite
didn't I enthusiasm? didn't you enthusiasm? didn't he enthusiasm? didn't we enthusiasm? didn't you enthusiasm? didn't they enthusiasm?
Preterite continuous
wasn't I enthusiasming? weren't you enthusiasming? wasn't he enthusiasming? weren't we enthusiasming? weren't you enthusiasming? weren't they enthusiasming?
Present perfect
haven't I enthusiasmed? haven't you enthusiasmed? hasn't he enthusiasmed? haven't we enthusiasmed? haven't you enthusiasmed? haven't they enthusiasmed?
Present perfect continuous
haven't I been enthusiasming? haven't you been enthusiasming? hasn't he been enthusiasming? haven't we been enthusiasming? haven't you been enthusiasming? haven't they been enthusiasming?
Pluperfect
hadn't I enthusiasmed? hadn't you enthusiasmed? hadn't he enthusiasmed? hadn't we enthusiasmed? hadn't you enthusiasmed? hadn't they enthusiasmed?
Pluperfect continuous
hadn't I been enthusiasming? hadn't you been enthusiasming? hadn't he been enthusiasming? hadn't we been enthusiasming? hadn't you been enthusiasming? hadn't they been enthusiasming?
Future
won't I enthusiasm? won't you enthusiasm? won't he enthusiasm? won't we enthusiasm? won't you enthusiasm? won't they enthusiasm?
Future continuous
won't I be enthusiasming? won't you be enthusiasming? won't he be enthusiasming? won't we be enthusiasming? won't you be enthusiasming? won't they be enthusiasming?
Future perfect
won't I have enthusiasmed? won't you have enthusiasmed? won't he have enthusiasmed? won't we have enthusiasmed? won't you have enthusiasmed? won't they have enthusiasmed?
Future perfect continuous
won't I have been enthusiasming? won't you have been enthusiasming? won't he have been enthusiasming? won't we have been enthusiasming? won't you have been enthusiasming? won't they have been enthusiasming?
Conditional
Present
wouldn't I enthusiasm? wouldn't you enthusiasm? wouldn't he enthusiasm? wouldn't we enthusiasm? wouldn't you enthusiasm? wouldn't they enthusiasm?
Present continuous
wouldn't I be enthusiasming? wouldn't you be enthusiasming? wouldn't he be enthusiasming? wouldn't we be enthusiasming? wouldn't you be enthusiasming? wouldn't they be enthusiasming?
Past
wouldn't I have enthusiasmed? wouldn't you have enthusiasmed? wouldn't he have enthusiasmed? wouldn't we have enthusiasmed? wouldn't you have enthusiasmed? wouldn't they have enthusiasmed?
Past continuous
wouldn't I have been enthusiasming? wouldn't you have been enthusiasming? wouldn't he have been enthusiasming? wouldn't we have been enthusiasming? wouldn't you have been enthusiasming? wouldn't they have been enthusiasming?