do I undo? do you undo? does he undo? do we undo? do you undo? do they undo?
Present continuous
am I undoing? are you undoing? is he undoing? are we undoing? are you undoing? are they undoing?
Preterite
did I undo? did you undo? did he undo? did we undo? did you undo? did they undo?
Preterite continuous
was I undoing? were you undoing? was he undoing? were we undoing? were you undoing? were they undoing?
Present perfect
have I undone? have you undone? has he undone? have we undone? have you undone? have they undone?
Present perfect continuous
have I been undoing? have you been undoing? has he been undoing? have we been undoing? have you been undoing? have they been undoing?
Pluperfect
had I undone? had you undone? had he undone? had we undone? had you undone? had they undone?
Pluperfect continuous
had I been undoing? had you been undoing? had he been undoing? had we been undoing? had you been undoing? had they been undoing?
Future
will I undo? will you undo? will he undo? will we undo? will you undo? will they undo?
Future continuous
will I be undoing? will you be undoing? will he be undoing? will we be undoing? will you be undoing? will they be undoing?
Future perfect
will I have undone? will you have undone? will he have undone? will we have undone? will you have undone? will they have undone?
Future perfect continuous
will I have been undoing? will you have been undoing? will he have been undoing? will we have been undoing? will you have been undoing? will they have been undoing?
Conditional
Present
would I undo? would you undo? would he undo? would we undo? would you undo? would they undo?
Present continuous
would I be undoing? would you be undoing? would he be undoing? would we be undoing? would you be undoing? would they be undoing?
Past
would I have undone? would you have undone? would he have undone? would we have undone? would you have undone? would they have undone?
Past continuous
would I have been undoing? would you have been undoing? would he have been undoing? would we have been undoing? would you have been undoing? would they have been undoing?