do I back? do you back? does she back? do we back? do you back? do they back?
Present continuous
am I backing? are you backing? is she backing? are we backing? are you backing? are they backing?
Preterite
did I back? did you back? did she back? did we back? did you back? did they back?
Preterite continuous
was I backing? were you backing? was she backing? were we backing? were you backing? were they backing?
Present perfect
have I backed? have you backed? has she backed? have we backed? have you backed? have they backed?
Present perfect continuous
have I been backing? have you been backing? has she been backing? have we been backing? have you been backing? have they been backing?
Pluperfect
had I backed? had you backed? had she backed? had we backed? had you backed? had they backed?
Pluperfect continuous
had I been backing? had you been backing? had she been backing? had we been backing? had you been backing? had they been backing?
Future
will I back? will you back? will she back? will we back? will you back? will they back?
Future continuous
will I be backing? will you be backing? will she be backing? will we be backing? will you be backing? will they be backing?
Future perfect
will I have backed? will you have backed? will she have backed? will we have backed? will you have backed? will they have backed?
Future perfect continuous
will I have been backing? will you have been backing? will she have been backing? will we have been backing? will you have been backing? will they have been backing?
Conditional
Present
would I back? would you back? would she back? would we back? would you back? would they back?
Present continuous
would I be backing? would you be backing? would she be backing? would we be backing? would you be backing? would they be backing?
Past
would I have backed? would you have backed? would she have backed? would we have backed? would you have backed? would they have backed?
Past continuous
would I have been backing? would you have been backing? would she have been backing? would we have been backing? would you have been backing? would they have been backing?