en el diccionario PONS
I. tread <trod, trodden [or trod]> [tred] V. intr.
II. tread <trod, trodden [or trod]> [tred] V. trans.
| I | tread |
|---|---|
| you | tread |
| he/she/it | treads |
| we | tread |
| you | tread |
| they | tread |
| I | trod / ingl. am. tb. treaded |
|---|---|
| you | trod / ingl. am. tb. treaded |
| he/she/it | trod / ingl. am. tb. treaded |
| we | trod / ingl. am. tb. treaded |
| you | trod / ingl. am. tb. treaded |
| they | trod / ingl. am. tb. treaded |
| I | have | trodden / trod |
|---|---|---|
| you | have | trodden / trod |
| he/she/it | has | trodden / trod |
| we | have | trodden / trod |
| you | have | trodden / trod |
| they | have | trodden / trod |
| I | had | trodden / trod |
|---|---|---|
| you | had | trodden / trod |
| he/she/it | had | trodden / trod |
| we | had | trodden / trod |
| you | had | trodden / trod |
| they | had | trodden / trod |