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