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