do I tread? do you tread? does he tread? do we tread? do you tread? do they tread?
Present continuous
am I treading? are you treading? is he treading? are we treading? are you treading? are they treading?
Preterite
did I tread? did you tread? did he tread? did we tread? did you tread? did they tread?
Preterite continuous
was I treading? were you treading? was he treading? were we treading? were you treading? were they treading?
Present perfect
have I trod, trodden? have you trod, trodden? has he trod, trodden? have we trod, trodden? have you trod, trodden? have they trod, trodden?
Present perfect continuous
have I been treading? have you been treading? has he been treading? have we been treading? have you been treading? have they been treading?
Pluperfect
had I trod, trodden? had you trod, trodden? had he trod, trodden? had we trod, trodden? had you trod, trodden? had they trod, trodden?
Pluperfect continuous
had I been treading? had you been treading? had he been treading? had we been treading? had you been treading? had they been treading?
Future
will I tread? will you tread? will he tread? will we tread? will you tread? will they tread?
Future continuous
will I be treading? will you be treading? will he be treading? will we be treading? will you be treading? will they be treading?
Future perfect
will I have trod, trodden? will you have trod, trodden? will he have trod, trodden? will we have trod, trodden? will you have trod, trodden? will they have trod, trodden?
Future perfect continuous
will I have been treading? will you have been treading? will he have been treading? will we have been treading? will you have been treading? will they have been treading?
Conditional
Present
would I tread? would you tread? would he tread? would we tread? would you tread? would they tread?
Present continuous
would I be treading? would you be treading? would he be treading? would we be treading? would you be treading? would they be treading?
Past
would I have trod, trodden? would you have trod, trodden? would he have trod, trodden? would we have trod, trodden? would you have trod, trodden? would they have trod, trodden?
Past continuous
would I have been treading? would you have been treading? would he have been treading? would we have been treading? would you have been treading? would they have been treading?