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