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