do I not refer? do you not refer? does he not refer? do we not refer? do you not refer? do they not refer?
Present continuous
am I not referring? are you not referring? is he not referring? are we not referring? are you not referring? are they not referring?
Preterite
did I not refer? did you not refer? did he not refer? did we not refer? did you not refer? did they not refer?
Preterite continuous
was I not referring? were you not referring? was he not referring? were we not referring? were you not referring? were they not referring?
Present perfect
have I not referred? have you not referred? has he not referred? have we not referred? have you not referred? have they not referred?
Present perfect continuous
have I not been referring? have you not been referring? has he not been referring? have we not been referring? have you not been referring? have they not been referring?
Pluperfect
had I not referred? had you not referred? had he not referred? had we not referred? had you not referred? had they not referred?
Pluperfect continuous
had I not been referring? had you not been referring? had he not been referring? had we not been referring? had you not been referring? had they not been referring?
Future
will I not refer? will you not refer? will he not refer? will we not refer? will you not refer? will they not refer?
Future continuous
will I not be referring? will you not be referring? will he not be referring? will we not be referring? will you not be referring? will they not be referring?
Future perfect
will I not have referred? will you not have referred? will he not have referred? will we not have referred? will you not have referred? will they not have referred?
Future perfect continuous
will I not have been referring? will you not have been referring? will he not have been referring? will we not have been referring? will you not have been referring? will they not have been referring?
Conditional
Present
would I not refer? would you not refer? would he not refer? would we not refer? would you not refer? would they not refer?
Present continuous
would I not be referring? would you not be referring? would he not be referring? would we not be referring? would you not be referring? would they not be referring?
Past
would I not have referred? would you not have referred? would he not have referred? would we not have referred? would you not have referred? would they not have referred?
Past continuous
would I not have been referring? would you not have been referring? would he not have been referring? would we not have been referring? would you not have been referring? would they not have been referring?