Present
I    tread
you  tread
he   treads
we   tread
you  tread
they tread

Perfect
I    have trodden; trod
you  have trodden; trod
he   has trodden; trod
we   have trodden; trod
you  have trodden; trod
they have trodden; trod

Past
I    trod
you  trod
he   trod
we   trod
you  trod
they trod

Pluperfect
I    had trodden; trod
you  had trodden; trod
he   had trodden; trod
we   had trodden; trod
you  had trodden; trod
they had trodden; trod

Future
I    will tread
you  will tread
he   will tread
we   will tread
you  will tread
they will tread

Future perfect
I    will have trodden; trod
you  will have trodden; trod
he   will have trodden; trod
we   will have trodden; trod
you  will have trodden; trod
they will have trodden; trod

Present
I    tread
you  tread
he   tread
we   tread
you  tread
they tread

Present
I    have trodden; trod
you  have trodden; trod
he   have trodden; trod
we   have trodden; trod
you  have trodden; trod
they have trodden; trod

Imperfect
I    trod
you  trod
he   trod
we   trod
you  trod
they trod

Pluperfect
I    had trodden; trod
you  had trodden; trod
he   had trodden; trod
we   had trodden; trod
you  had trodden; trod
they had trodden; trod

Present
I    would tread
you  would tread
he   would tread
we   would tread
you  would tread
they would tread

Perfect
I    would have trodden; trod
you  would have trodden; trod
he   would have trodden; trod
we   would have trodden; trod
you  would have trodden; trod
they would have trodden; trod

Present
I    am treading
you  are treading
he   is treading
we   are treading
you  are treading
they are treading

Perfect
I    have been treading
you  have been treading
he   has been treading
we   have been treading
you  have been treading
they have been treading

Past
I    was treading
you  were treading
he   was treading
we   were treading
you  were treading
they were treading

Pluperfect
I    had been treading
you  had been treading
he   had been treading
we   had been treading
you  had been treading
they had been treading

Future
I    will be treading
you  will be treading
he   will be treading
we   will be treading
you  will be treading
they will be treading

Future perfect
I    will have been treading
you  will have been treading
he   will have been treading
we   will have been treading
you  will have been treading
they will have been treading

Present
I    would be treading
you  would be treading
he   would be treading
we   would be treading
you  would be treading
they would be treading

Perfect
I    would have been treading
you  would have been treading
he   would have been treading
we   would have been treading
you  would have been treading
they would have been treading