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