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