don't I function? don't you function? doesn't he function? don't we function? don't you function? don't they function?
Present continuous
am I not functioning? aren't you functioning? isn't he functioning? aren't we functioning? aren't you functioning? aren't they functioning?
Preterite
didn't I function? didn't you function? didn't he function? didn't we function? didn't you function? didn't they function?
Preterite continuous
wasn't I functioning? weren't you functioning? wasn't he functioning? weren't we functioning? weren't you functioning? weren't they functioning?
Present perfect
haven't I functioned? haven't you functioned? hasn't he functioned? haven't we functioned? haven't you functioned? haven't they functioned?
Present perfect continuous
haven't I been functioning? haven't you been functioning? hasn't he been functioning? haven't we been functioning? haven't you been functioning? haven't they been functioning?
Pluperfect
hadn't I functioned? hadn't you functioned? hadn't he functioned? hadn't we functioned? hadn't you functioned? hadn't they functioned?
Pluperfect continuous
hadn't I been functioning? hadn't you been functioning? hadn't he been functioning? hadn't we been functioning? hadn't you been functioning? hadn't they been functioning?
Future
won't I function? won't you function? won't he function? won't we function? won't you function? won't they function?
Future continuous
won't I be functioning? won't you be functioning? won't he be functioning? won't we be functioning? won't you be functioning? won't they be functioning?
Future perfect
won't I have functioned? won't you have functioned? won't he have functioned? won't we have functioned? won't you have functioned? won't they have functioned?
Future perfect continuous
won't I have been functioning? won't you have been functioning? won't he have been functioning? won't we have been functioning? won't you have been functioning? won't they have been functioning?
Conditional
Present
wouldn't I function? wouldn't you function? wouldn't he function? wouldn't we function? wouldn't you function? wouldn't they function?
Present continuous
wouldn't I be functioning? wouldn't you be functioning? wouldn't he be functioning? wouldn't we be functioning? wouldn't you be functioning? wouldn't they be functioning?
Past
wouldn't I have functioned? wouldn't you have functioned? wouldn't he have functioned? wouldn't we have functioned? wouldn't you have functioned? wouldn't they have functioned?
Past continuous
wouldn't I have been functioning? wouldn't you have been functioning? wouldn't he have been functioning? wouldn't we have been functioning? wouldn't you have been functioning? wouldn't they have been functioning?