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